Insight II Next-Generation EEG Review
NeoPrism Analysis Suite
Quick Start Guide
|
Persyst Development
Corporation |
January 29, 2004
Insight II Description
Insight II is the Next-Generation of EEG Review for the Persyst EEG Suite. Insight II incorporates many new enhancements to Insight including fully-integrated Reveal (iReveal) and MagicMarker (iMagicMarker).
Insight II is launched by selecting Start|Programs|Insight|InsightII
There’s no price in crease from Insight to Insight II, and Insight II includes the new NeoPrism analysis suite free of charge.
NeoPrism is a highly advanced suite of voltage, frequency, and advance analysis tools fully integrated with Insight II including: Time Domain Analysis, Frequency Domain Analysis, Principal Component Analysis, Matching Pursuit, Bispectrum, and Discrete and Continuous Wavelet Transforms, and much, much more.
The following document provides preliminary operational notes, and there will be a full User Guide with advanced Clinical Applications Notes detailing the use of the complete NeoPrism analysis suite.
Animated screen tours of Insight II with Neo Prism are on
this CD-ROM. From the CD Main Menu, select Applications Notes & Demos,
then Insight II Next-Generation EEG.
Table of Contents (select links below to jump to that
section)
User Cursors and Fine Time and Amplitude
Measurement
4
Multiple Adornments Connected to the EEGPage.
32
Hidden (but Functional) Adornments.
33
Adding Cursors to Underlays.
36
The PersystLayout (*.lay) file format has been replaced with the PersystLayoutXML (*.psx) file format. Like the original *.lay format, this file does not contain EEG data, but contains comments/events added from within Insight II and other attributes that describe the EEG record. The file format is XML and can be edited by any XML editor.
The *.lay format is still supported for labs that use both Insight and Insight II. The default format is selected from the main menu File|Default Layout Format. The layout format can also be selected from the Save As dialog.
EEGPage Sizing
Resizing the main window, adding adornments and docking dialog bars may reduce the width allotted to the EEGPage. When this happens, the duration of the displayed EEG can be held fixed (e.g., at 10 seconds) by squishing the waveforms or it can be reduced (without squishing) to fit the reduced page width. The rectangle with the horizontal blue arrow in the toolbar below is used to toggle between these two modes.
Similarly the vertical blue arrow controls how the display is rearranged when the height of the EEGPage is changed. The square with the blue trim fixes the size of the EEGPage to the current dimensions. The square with the diagonal arrow shows the EEGPage Size properties, which allows exact control of the displayed dimensions.
User Cursors and Fine Time and Amplitude Measurement
The screen below shows five spikes, each marked by a User Cursor. (The name User Cursor is used to distinguish this feature from the Windows Mouse Cursor. When the usage is clear, just the name Cursor is used.) A Cursor is inserted by right clicking on the EEGPage at the time of interest to display the context menu and selecting Insert Cursor. Precise positioning is aided by using the Track mode for the Mouse Cursor – from the toolbar with the mouse cursors and magnifying glass, select the arrow with the vertical line on the left. The Cursor (shown below) on the far left is selected as indicated by the down arrow at the top. The position of the selected Cursor(s) can be moved with the Right/Left keys or by dragging it from the top. (Use the Ctrl key to drag multiple selected cursors.)
Multiple Cursors can be selected by using the Ctrl key. All the Cursors can be deselected by clicking (not on a Cursor) at the very top of the EEGPage. Right click the top of a Cursor to display its context menu, which allows you to select/deselect, erase or edit the Cursor. Right click on the EEGPage to display its context menu and select Cursor Control to select all/none, erase all/selected, edit (Properties) or show the Cursor times. Here is the same screen with all Cursors selected and the Cursor Control|Show Times feature turned on. Note that View|Times must be turned on because the Cursor times are show in the Time row.
The resolution of the displayed times (currently showed as hours:minutes:seconds.hundredths) can be increased by selecting View|Display Options and increasing the Second Resolution.
The color and the name of the Cursors may be changed. If the Name of a Cursor is not blank, the Name will be displayed rather than the time.
By default, the Cursors times are fixed, and the Cursors are hidden when the EEGPage is scrolled. To keep a Cursor on the visible EEGPage, edit the Cursor and select the System Cursor option. This will help you measure the duration and amplitude of similar events on may different pages. As shown above in the View|Display Settings, turn on the Hightlight Selected Channel option and then add three cursors. Select channel F4-Ref and note that the status bar displays the delta times and amplitudes between the three selected Cursors (see the highlighted text below). Select channel FP2-Ref to see that the spike’s second-half-wave height is now 108.4 uV. Press the Ctrl key and drag all three (selected) Cursors to another event to measure it. The text in the status bar may be overritten (e.g., by hovering the Mouse Cursor over a toolbar), but it can be redisplayed by reselecting the channel (or doing anything that redraws the EEGPage). Select just a single Cursor to show its time and absolute amplitude in the status bar. If no channel is selected, then just the cursor times or deltas will be displayed.
The deltas between cursors can also be displayed by selecting Cursor Control|Properties from the EEGPage context menu.
Often you want a single, easily place able Cursor that “follows” your movements across multiple EEG pages. Choose View|Cursor at Caret Time to enable this feature. When the EEGPage has input focus, the Caret is displayed as a flashing down arrow outline. Clicking on the EEGPage updates the position of the Caret and the attached Cursor (if Cursor at Caret Time is enabled). Again, the attached Cursor and consequently the Caret can be moved with the Left/Right keys or by dragging. The right hand side of the status bar indicates the time at the start of the displayed EEGPage, the time of the Caret and the time of the Mouse Cursor. If a channel is currently selected, then the Mouse Cursor display also includes the amplitude of the channel.
A
Cursors or Ranges may also be used to manipulate the salient parts of Events (or Comments). The Comment “Hello” was inserted by selecting Insert Event|Comment from the EEGPage context menu. The event’s properties can be edited by right clicking on the event to display its context menu or double clicking on it. The endpoints of the Comment event are displayed as a Range. (Choose Insert Event|UserMark to add a more complex event that allows multiple points to be noted with Cursors.)
The current set of Cursors and Ranges can be saved with a Bookmark event. Select Insert|Bookmark to capture the current Cursors. Click on the Bookmark displayed in the Comment List’s Bookmarks tab to restore the Cursors as shown below.
Adornments
Right click on the EEGPage to display the list of Adornments and select FFT as shown below.
Depending on the program settings, described below, you may be prompted with the Adornment properties. Select OK.
This results in the side-by-side FFT power spectra shown below. As you scroll the EEGPage, the FFT is updated.
Data Ranges
Right
click on the Adornment to display its context menu and select Properties, then select the
Insert a
Range on the EEGPage and set the
Cursors and Ranges
Right
click on the Adornment and select
Like the Cursors and Ranges on the EEGPage, the Cursors and Ranges on the Adornment are moved by selecting them at the top and dragging them. (Use the Ctrl key to move multiple selected Cursors.) The Left/Right keys can also be used, but you must first deselect the Cursors on the EEGPage. (The Left/Right keys are first applied to the EEGPage, if any selected Cursors exist, and then each consecutive Adornment.)
Right click on the Adornment and select Insert Vertical Adornment|Cursor Output. Right click on the Cursor Output Adornment and select Insert Vertical Adornment|Topograph to display the spatial distribution of the high frequency activity.
Adornment Definitions
Right click on an Adornment and select Definitions to display the dialog below.
Use this feature to save and apply frequently used sets of Adornment attributes. The “Prompt for Definition” and “Prompt for Properties” settings for this attribute have not yet been set, so the checkboxes are grayed.
Adornment Montages
The Adornments created previously can be removed by right clicking on each and selecting Delete. A faster way to remove multiple Adornments is via the Adornment Montage control highlighted below – select “NA”.
Frequently used sets of Adornments (e.g., the FFT/Cursor Output/Topograph combination above) can be captured in a named Adornment Montage by selecting Montage|Save Adornment Montage from the main menu.
Bookmarks
Bookmark events capture the current EEGPage settings (montage name, sensitivity, etc.), the current Cursors and Ranges and the current Adornments. This allows very specific page layouts to be captured and stored in the PersystLayoutXML file. Select Insert|Bookmark from the main menu to add a Bookmark. To redisplay a Bookmark, select the Bookmark tab at the bottom of the Comment List. For example, Bookmark1 for the record below restores the three Cursors that are averaged to create a Voltage Plot.
Events/Comments
The names Events and Comments are used interchangeably. The only exception is that a very simple type of event (text and start/end times) is called a Comment event.
Event Filters
The Navigation Bar (below the EEGPage) and the Comment List both allow display of a filtered subset of events. Select View|Display Options|Filter Comments to control which events are selected.
The filtered subset can include events from a particular Origin or more specifically those events whose text matches a given string. The event colors are set whether or not the events are displayed in the filtered set.
Event Review
Events can be reviewed in succession by using the Comment List. Turn on the Cursor at Caret Time option to better highlight the selected event. Use the Down key to select the next event in the list. Use the Delete key to delete the current event and select the next event. The screen below shows the Reveal spikes being reviewed in this manner.
Note that when the scan montage (in this case LaplacianNoFpzOz) is used, the six-segment spike fit created by Reveal will be shown on the prominent channel. Turn this feature off by deselecting View|Display Options|EEG Page|Select Event Glyphs.
Custom Filters
Custom Filters are available in addition to the Time Constant, High Filter and Notch Filter.
New filters can be designed by selecting View|Display Options|EEG Page|Filter Types.
Montage Bar Updates
The Montage Bar supports drag rectangles for selecting channels. Channels can also be repositioned via drag and drop. Channels (or Instruments, see below) can be temporarily hidden, which aids the detailed analysis, e.g., Matching Pursuit, of a subset of channels by giving them more vertical space.
Legend Bar
Select View|Legend Bar to show calibration marks on the right side of the EEGPage when subsets of channels are displayed at a different sensitivity (i.e., they override the Master Control). Right click on the Legend Bar and select Show Values to display the amplitudes of the channels at the Caret Time as shown below.
Non-Channel Instruments
Instruments other than EEG channels may be displayed on the EEGPage. Select one or more Channels, right click on the Montage Bar and select Insert Instruments as shown below.
The result with the added FFG Spectrograms is shown below. The Instruments are saved and restored with the rest of the montage when you select Montage|Save Montage.
Use the Legend Bar to find the Instrument values at the Caret Time. If the Instrument has multiple values at a given instant, then the maximum value is reported along with the y-axis point for the maximum. (In this example the frequency resolution is low, 2.91 Hz, because the time resolution is high, 0.32 sec.)
Underlays
A subset of the Vertical Adornments (those that have an x-axis corresponding the time-axis of the EEG) may be displayed under the EEGPage for easier comparison. Some of the Adornments/Underlays are computationally intensive and make take minutes to complete – their progress can be monitored via the status bar and may be stopped with the ESC key.
Integrated MagicMarker
Integrated Display
Rather than launching MagicMarker from the Tools menu, it is now available directly from Insight II via the MMarker toolbar. The MagicMarker display is shown in the main window by selecting the MMarker button. Analysis is started/paused with the Play button (right arrow). While data is being processed, the Status animation (planet with circling arrow) will move continuously. When MMarker is waiting for more data to be acquired, the Status animation will cycle once every second. Select the Properties button to define the analysis engines, panels, display duration, etc.
The name LTMPage (Long Term Monitoring) is used to describe the MagicMarker display, and it is essentially an EEGPage that displays a longer time scale. Like the EEGPage, Cursors can be added and their times/values are displayed in the status bar.
Multiple Engines
The creation of multiple analysis Engines allows the display of instruments with different sampling rates (epoch durations). Each engine can be assigned it’s own attributes by selecting it and pressing Edit. When a new Instrument is created, it is attached to the first valid Engine in the list. For example, a FFT_Spectrogram will be attached to the first FFTEngine in the list. The Engine list order can be changed with the Up/Down buttons.
There are new Engine types that allow a greater variety of analysis options, like the Phillips Monitor Engine for displaying critical care diagnostics such as heart rate and blood pressure. Data created by the Engines is stored in a file with an .mg2 extension. Once the analysis has been started, no new Engines can be added and their properties are fixed, but new Instruments can be added.
After the Engines and Instruments have been created, the Instruments can be assigned to Panels, which are similar to Montages. Any changes to the Engines, Instruments or Panels need to be saved by updating the Definitions file PSMagic.mmx. (Note: the Auto Save Changes feature has been removed because this resulted in new Engine settings being lost when the Engine attributes were restored from the .mg2 file.)
Montage Bar
The
Montage Bar for the MMarker Panel
is located on the far left side of the display like it is on the EEGPage. To
save horizontal space, the Instrument names are not shown, but the Instruments
can still be selected and edited. Below, the two Spectrogram instruments are
selected, in preparation for editing so that common settings, e.g., the contour
palette or range, can be changed in concert.
More vertical space can be reclaimed by selecting Hide Instrument Names, which may be helpful when the screen is split vertically to display the EEGPage. The Instrument Name will be shown in a Tooltip window by letting the Mouse Cursor hover over the Montage Bar.
Legend Bar
Similar to its use on the EEGPage, the Legend Bar can be displayed and will either show the y-axis range or the Instrument value at the Caret Time.
Preferences
Split to EEGPage on the Preferences tab of the Properties Sheet allows you to control whether splitting the display will create an EEGPage, as shown above, or another MMarker Panel. Sync EEGPage Time updates the “connected” EEGPage when the Caret on the LTMPage is updated (e.g., by clicking on the LTMPage). The “connected” EEGPage is either the default EEGPage display (shown by selecting the Review) button, or an EEGPage created by splitting the MMarker window. The “connected” EEGPage is changed by clicking on that page and activating it.
One Touch EEG
The One Touch EEG feature is activated via the Cursor with a plus sign at the top left.
When in this mode, clicking on the LTMPage will activate the EEGPage connected to the Review button. Clicking on the EEGPage will return you to the LTMPage. (This feature actually returns you to the last previous pane/tab, so you can jump back and forth between any two displays.) Choose the Select Cursor (plain arrow) when you are done with One Touch feature.
AutoStart/End
Click on the down arrow on the right side of the MMarker button to display the AutoStart/End options.
Analysis can be automatically started after a record is opened by selection the AutoStart option. When this option is turned on, the Start button will toggle for ten seconds after a record is opened giving you time to stop the automatic start if you want. Simply press the Start button to stop the automatic countdown. In general, there is no way for Insight to know when the collection of a record is complete, i.e., the cessation of data being added to the file may just reflect a pause in the acquisition. As such, the AutoEnd option should only be used in cases where you know that the data acquisition is complete (offline).
Complete control over the automatic launching and shutdown of Insight, MagicMarker and Reveal is available from LightHouse.
Integrated Reveal
Similar to the integrated MagicMarker, Reveal is also available from an Insight toolbar.
Press the Reveal button to display the standard Reveal window.
Multiple Adornments Connected to the EEGPage
Multiple Adornments can be connected to the EEGPage as their source of data. In the example below, first an FFT adornment as inserted and then an FFT Spectrogram adornment. The multiple adornments can be saved as a named Adornment Montage or Bookmark to simplify their recreation.
Hidden (but Functional) Adornments
The topographic displays below show the power in two FFT bands.
If the desired information is contained only in the Topographic maps, th