Yoshi Adachi's

Meg Laboratory Reference Manual

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Table of Contents
(to be read as one looks at the MEG160 drop down menu, left to right)

 

File • Acquis • Edit • MRI • Analysis • Tool • Property • View • Window • Help

 

 

1. File..................................................................11
1.1 New ................................................................................................................................ 11
1.2 Open............................................................................................................................... 11
1.3 Transfer... ........................................................................................................................ 11
1.4 Suspended File List ......................................................................................................... 12
1.5 Save ............................................................................................................................... 12
1.6 Save As... ........................................................................................................................ 12
1.7 Close ............................................................................................................................... 12
1.8 Close All .......................................................................................................................... 13
1.9 Pack MEG file.................................................................................................................. 13
1.10 Unpack MEG file............................................................................................................ 13
1.11 Grand Average............................................................................................................... 13
1.12 Export ............................................................................................................................ 13
1.13 Import ............................................................................................................................ 14
1.14 Block Export .................................................................................................................. 14
1.15 Navigator File ................................................................................................................ 15
1.15.1 Axial View............................................................................................................... 15
1.15.2 Coronal View.......................................................................................................... 15
1.15.3 Sagittal View........................................................................................................... 15
1.16 BESA Export.................................................................................................................. 15
1.16.1 Electrode Configuration.......................................................................................... 15
1.16.2 Position File............................................................................................................ 16
1.16.3 ASCII Data ............................................................................................................. 16
1.16.4 Surface Point File................................................................................................... 16
1.17 MRI File ......................................................................................................................... 17
1.17.1 Create MRI File from DICOM-3 file ........................................................................ 17
1.17.2 Create MRI File from pixel data.............................................................................. 18
1.17.3 Create MRI File from digitizer data......................................................................... 19
1.17.4 Setup Head Coordinate System............................................................................. 20
1.18 MEG Marker Positioning................................................................................................ 21
1.19 Print... ............................................................................................................................ 23
1.20 Print Preview ................................................................................................................. 23
1.21 Print Setup..................................................................................................................... 23
1.22 Exit ............................................................................................................................... 23

 

2. Acquis..................................................................24
2.1 System Definition............................................................................................................. 25
2.1.1 System Scale ........................................................................................................... 25
2.1.2 Channel Definition.................................................................................................... 26
2.2 Auto Tuning Setup ........................................................................................................... 27
2.3 Auto Tuning...................................................................................................................... 27
2.4 Manual Tuning................................................................................................................. 28
2.5 DC offset Tuning.............................................................................................................. 28
2.6 File.................................................................................................................................. 29
2.6.1 Load ......................................................................................................................... 29
2.6.2 Save As .................................................................................................................... 29
2.6.3 Load Init File............................................................................................................. 29
2.6.4 Save Init File ............................................................................................................ 30
2.6.5 Save As Text File...................................................................................................... 30
2.7 MEG Measurement ......................................................................................................... 31
2.8 Options ............................................................................................................................ 32
2.9 Control Panel................................................................................................................... 32
2.10 ReBoot DAQ.................................................................................................................. 32
2.11 Shutdown DAQ.............................................................................................................. 33
2.12 Maintenance.................................................................................................................. 33
2.12.1 Abort DAQ.............................................................................................................. 33

 

3. Edit......................................................................34
3.1 Undo............................................................................................................................... 34
3.2 Cut.................................................................................................................................. 34
3.3 Copy ............................................................................................................................... 34
3.4 Paste ............................................................................................................................... 35
3.5 Comment........................................................................................................................ 35
3.6 Patient Info ...................................................................................................................... 36
3.7 Channel Info .................................................................................................................... 36
3.8 Macro Command............................................................................................................. 37
3.9 HPF ................................................................................................................................ 38
3.10 LPF............................................................................................................................... 39
3.11 BPF............................................................................................................................... 39
3.12 BEF ............................................................................................................................... 40
3.13 Customized Filter........................................................................................................... 40
3.14 Moving Average............................................................................................................. 40
3.15 Baseline Correct ............................................................................................................ 42
3.16 Absolute........................................................................................................................ 42
3.17 Multiply .......................................................................................................................... 44
3.18 Power ............................................................................................................................ 44
3.19 Channel Math. Operation .............................................................................................. 45
3.19.1 Maximum................................................................................................................ 46
3.19.2 Minimum................................................................................................................. 46
3.19.3 Average .................................................................................................................. 47
3.19.4 Weighted Average .................................................................................................. 47
3.19.5 RMS ....................................................................................................................... 48
3.20 File Math. Operation ...................................................................................................... 48
3.20.1 Add......................................................................................................................... 49
3.20.2 Subtract.................................................................................................................. 49
3.20.3 Concatenate........................................................................................................... 49
3.21 Extract ........................................................................................................................... 50
3.22 Thin out.......................................................................................................................... 50
3.23 Patch ............................................................................................................................. 51
3.24 Forward Problem........................................................................................................... 51
3.25 Noise Reduction ............................................................................................................ 52
3.26 Averaging...................................................................................................................... 53

 

4. MRI......................................................................54
4.1 Create MRI File from DICOM-3 file.................................................................................. 54
4.2 Create MRI File from pixel data....................................................................................... 54
4.3 Create MRI File from digitizer data.................................................................................. 55
4.4 Setup Head Coordinate System...................................................................................... 55
4.5 MRI Filename .................................................................................................................. 56
4.6 Pick MRI Marker .............................................................................................................. 57
4.7 MEG Marker Positioning.................................................................................................. 58
4.8 MRI-MEG Matching ......................................................................................................... 58

 

5. Analysis...............................................................59
5.1 Sphere Model .................................................................................................................. 60
5.2 Dipole Fitting.................................................................................................................... 61
5.3 Multi Dipole Fitting ........................................................................................................... 61
5.3 Multi Dipole Fitting ........................................................................................................... 62
5.4 Lead Field Reconstruction............................................................................................... 63
5.5 Manual Dipole Fitting....................................................................................................... 64
5.6 Arrange MSI Entries ........................................................................................................ 65
5.6.1 Right to Left.............................................................................................................. 65
5.6.2 Left to Right.............................................................................................................. 65
5.6.3 Anterior to Posterior.................................................................................................. 65
5.6.4 Posterior to Anterior.................................................................................................. 65
5.6.5 Superior to Inferior ................................................................................................... 65
5.6.6 Inferior to Superior ................................................................................................... 66
5.6.7 by Intensity in descending order(+) .......................................................................... 66
5.6.8 by Intensity in ascending order (-) ............................................................................ 66
5.7 Medical Opinion............................................................................................................... 67
5.8 Delete MSI Entry ............................................................................................................. 68
5.8.1 Delete current Entry ................................................................................................. 68
5.8.2 Delete series Entries ................................................................................................ 68
5.8.3 Delete specified Entries............................................................................................ 69
5.8.4 Delete multiple Entries ............................................................................................. 69
5.8.5 Delete all Entries ...................................................................................................... 70
5.9 Book Mark ....................................................................................................................... 70
5.10 Entry Book Mark from MSI ............................................................................................ 71
5.11 Delete Book Mark Entry................................................................................................. 72
5.11.1 Delete current Entry................................................................................................ 72
5.11.2 Delete series Entries .............................................................................................. 72
5.11.3 Delete specified Entries.......................................................................................... 72
5.11.4 Delete all Entries .................................................................................................... 72

 

6. Tool......................................................................73
6.1 Statistics of Data.............................................................................................................. 73
6.2 Statistics of MSI............................................................................................................... 74
6.3 Auto Correlation............................................................................................................... 75
6.4 Cross Correlation............................................................................................................. 76
6.5 Correlation...................................................................................................................... 76
6.6 Correlation Map ............................................................................................................... 77
6.7 File Correlation ................................................................................................................ 77
6.8 t-test ............................................................................................................................... 78
6.9 Time-Integral.................................................................................................................... 79
6.10 FFT Amplitude ............................................................................................................... 80
6.11 FFT Power ..................................................................................................................... 81
6.12 FFT Phase..................................................................................................................... 82
6.13 FFT Map........................................................................................................................ 83
6.14 Time-FFT Map ............................................................................................................... 84

 

7. Property...............................................................85
7.1 Basic Info......................................................................................................................... 85
7.2 Patient Info ...................................................................................................................... 85
7.3 History Info ...................................................................................................................... 85
7.4 Channel Info .................................................................................................................... 85
7.5 Calibration Info ................................................................................................................ 85
7.6 FLL Info ........................................................................................................................... 86
7.7 Amp and Filter Info .......................................................................................................... 86
7.8 Acquis Condition Info....................................................................................................... 86
7.9 Trigger Event Info ............................................................................................................ 86
7.10 MRI Info......................................................................................................................... 86
7.11 MRI-MEG Matching Info ................................................................................................ 86
7.12 Measured Data Info....................................................................................................... 86
7.13 Magnetic Source Info..................................................................................................... 87
7.14 Book Mark ..................................................................................................................... 87
7.15 Save Any Properties As ................................................................................................. 87

 

8. View ....................................................................88
8.1 Toolbar............................................................................................................................ 88
8.2 Status Bar........................................................................................................................ 88
8.3 Layout............................................................................................................................. 89
8.3.1 Standard Layout....................................................................................................... 89
8.3.2 Waveform Leftside ................................................................................................... 90
8.3.3 Waveform Upside..................................................................................................... 90
8.4 Standard 3-View.............................................................................................................. 91
8.5 Standard 4-View.............................................................................................................. 91
8.6 Title View......................................................................................................................... 91
8.6.1 Show........................................................................................................................ 91
8.6.2 Patient Info............................................................................................................... 91
8.6.3 File Extension........................................................................................................... 92
8.6.4 Acquis Condition ...................................................................................................... 92
8.7 Waveform View................................................................................................................ 93
8.7.1 Full Size ................................................................................................................... 93
8.7.2 Show........................................................................................................................ 93
8.7.3 Display Range.......................................................................................................... 94
8.7.4 EEG scale ................................................................................................................ 94
8.7.5 Overlap..................................................................................................................... 94
8.7.6 Parallel ..................................................................................................................... 95
8.7.7 Gridmap ................................................................................................................... 95
8.7.8 Tesla......................................................................................................................... 96
8.7.9 A/D ........................................................................................................................... 96
8.7.10 Voltage ................................................................................................................... 96
8.7.11 RMS only................................................................................................................ 96
8.7.12 RMS also................................................................................................................ 98
8.7.13 Splitter Waveform................................................................................................... 99
8.7.13.1 Full Size ............................................................................................... 99
8.7.13.2 Show.................................................................................................. 100
8.7.13.3 Overlap............................................................................................... 100
8.7.13.4 Parallel ............................................................................................... 100
8.7.13.5 Tesla................................................................................................... 100
8.7.13.6 A/D ..................................................................................................... 100
8.7.13.7 Voltage ............................................................................................... 101
8.7.13.8 Select Channel................................................................................... 101
8.7.14 Background .......................................................................................................... 102
8.7.15 Outline.................................................................................................................. 102
8.7.16 Epoch Frame........................................................................................................ 102
8.7.17 X-Cursor............................................................................................................... 102
8.7.18 Y-Cursor ............................................................................................................... 103
8.7.18.1 Show.................................................................................................. 103
8.7.18.2 Mouse Cursor..................................................................................... 104
8.7.18.3 Maximum............................................................................................ 104
8.7.18.4 Minimum............................................................................................. 105
8.7.18.5 RMS ................................................................................................... 105
8.7.19 Book Mark ............................................................................................................ 105
8.7.20 Non-MEG Channels on Gridmap ......................................................................... 105
8.8 Contour Map View......................................................................................................... 107
8.8.1 Full Size ................................................................................................................. 107
8.8.2 Show...................................................................................................................... 107
8.8.3 Measured Contour.................................................................................................. 107
8.8.4 Measured + Theoretical Contour............................................................................ 108
8.8.5 Measured + Theoretical + Residual Contour.......................................................... 108
8.8.6 Auto........................................................................................................................ 109
8.8.7 2-Color Contour....................................................................................... 109
8.8.8 Line Contour........................................................................................................... 110
8.8.9 Gradation Contour.................................................................................................. 110
8.8.10 Line Gradation Contour .........................................................................................111
8.8.11 Auto Gain...............................................................................................................111
8.8.12 Whole Area........................................................................................................... 112
8.8.13 Background .......................................................................................................... 112
8.8.14 Outline.................................................................................................................. 112
8.8.15 Channel Position .................................................................................................. 112
8.8.16 Channel Number .................................................................................................. 113
8.9 MRI View....................................................................................................................... 114
8.9.1 Full Size ................................................................................................................. 114
8.9.2 Show .......................................................................................................................... 114
8.9.3 Axial View ................................................................................................................... 114
8.9.4 Coronal View .............................................................................................................. 115
8.9.5 Sagittal View............................................................................................................... 115
8.9.6 Background ................................................................................................................ 115
8.9.7 MR-Image .............................................................................................................. 115
8.9.8 MEG Sensor........................................................................................................... 115
8.9.9 MEG Marker........................................................................................................... 115
8.9.10 MRI Marker .......................................................................................................... 115
8.9.11 Sphere Model ....................................................................................................... 115
8.9.12 Contour Map ........................................................................................................ 116
8.9.13 Dipole................................................................................................................... 116
8.9.14 Coordinate Frame ................................................................................................ 116
8.9.15 Slice Position........................................................................................................ 116
8.9.16 Display All............................................................................................................. 116
8.9.17 Link to Dipole #1 .................................................................................................. 116
8.9.18 Link to Dipole #2 .................................................................................................. 116
8.9.19 No Link to Dipole.................................................................................................. 116
8.9.20 Reference Dipoles................................................................................................ 117
8.9.21 Reference Dipoles of Other File........................................................................... 118
8.10 MSI Report View.......................................................................................................... 119
8.10.1 Full Size ............................................................................................................... 119
8.10.2 Show.................................................................................................................... 119
8.10.3 MEG Coordinate .................................................................................................. 119
8.10.4 MRI Coordinate .................................................................................................... 119
8.10.5 Head Coordinate .................................................................................................. 119
8.11 MSI Select View........................................................................................................... 120
8.12 Select View Format...................................................................................................... 121
8.12.1 Show.................................................................................................................... 121
8.12.2 Waveform View .................................................................................................... 121
8.12.3 MRI View.............................................................................................................. 121
8.12.4 Colored by Label .................................................................................................. 121
8.12.5 Colored by Time ................................................................................................... 121
8.12.6 Colored by GOF................................................................................................... 122
8.12.7 Colored by Intensity.............................................................................................. 122
8.12.8 Colored by Time order.......................................................................................... 122
8.12.9 Colored by GOF order.......................................................................................... 122
8.12.10 Colored by Intensity order .................................................................................. 122
8.13 Search Next................................................................................................................. 123
8.14 Select View All ............................................................................................................. 123
8.15 Series View.................................................................................................................. 123
8.15.1 Show.................................................................................................................... 124
8.15.2 Waveform View .................................................................................................... 124
8.15.3 MRI View.............................................................................................................. 124
8.15.4 Contour Map Window........................................................................................... 124
8.15.5 MR-Image Window............................................................................................... 124
8.16 Series View of All MSI.................................................................................................. 125
8.17 Graphic Attribute.......................................................................................................... 126
8.17.1 Frame Attribute..................................................................................................... 127
8.17.2 Waveform Attribute............................................................................................... 128
8.17.3 Contour Attribute .................................................................................................. 128
8.17.4 MRI Attribute ........................................................................................................ 129
8.17.5 Serial/Select View Attribute .................................................................................. 129
8.17.6 Initial View Attribute .............................................................................................. 130
8.17.7 Init All Attribute...................................................................................................... 130
8.17.8 Import All Attribute ................................................................................................ 130
8.18 Associated windows .................................................................................................... 131
8.18.1 Minimize ............................................................................................................... 131
8.18.2 Maximize .............................................................................................................. 131
8.18.3 Normalize ............................................................................................................. 131
8.18.4 Close.................................................................................................................... 131
8.18.5 Minimize others .................................................................................................... 132
8.18.6 Maximize others ................................................................................................... 132
8.18.7 Normalize others .................................................................................................. 132
8.18.8 Close others ......................................................................................................... 132
8.18.9 Minimize all .......................................................................................................... 132
8.18.10 Maximize all ....................................................................................................... 132
8.18.11 Normalize all....................................................................................................... 132
8.18.12 Close all ............................................................................................................. 132
8.19 Select Channel ............................................................................................................ 133
8.20 MSI Using Channel...................................................................................................... 133

 

9. Window .............................................................134
9.1 New Window.................................................................................................................. 134
9.2 Cascade ........................................................................................................................ 134
9.3 Tile Horizontal................................................................................................................ 134
9.4 Tile Vertical .................................................................................................................... 134
9.5 Arrange Icons ................................................................................................................ 134

 

10. Help.................................................................134