GE Vivid 7 Service Manual
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GE HEALTHCARE DIRECTION FC091194, REVISION 11 VIVID 7 SERVICE MANUAL Chapter 4 - Functional Checks 4 - 37 4-3-6-6 2D Soft Menu Controls 4-3-6-7 Check Compress, Contour, Reject and Tilt Table 4-9 4-way rocker used for Soft Menu control KEYDESCRIPTION A 4-way rocker (4-way multi direction switch) used to; - access mode-specific menus on the screen. - select a menu option. - adjust option-related values. When using the Rocker; - the vertical arrows are used to select the menu options. - the horizontal arrows are used to adjust the values. Table 4-10 2D Mode: Check Compress, Contour, Reject and Tilt StepTaskExpected Result(s) 1. Use the vertical arrows to select Compress. Use the horizontal arrows to adjust Compress. Compress controls the amount of contrast in the 2D image. An index number is displayed in the status window to indicate the relative level of compression. 2. Use the vertical arrows to select Contour. Use the horizontal arrows to adjust Contour. Contour controls image processing related to the extent of edge enhancement applied to an image. 3. Use the vertical arrows to select Reject. Use the horizontal arrows to adjust Reject. When Reject is increased, low-level echoes and noise are rejected and appear darker in the 2D image. An index number is displayed in the status window to indicate the relative level of rejection. 4. Use the vertical arrows to select Tilt. Use the horizontal arrows to adjust Tilt. Tilts the axis of the 2D image to the left or right. By using this control in combination with Angle control, the image can be “aligned” to the direction of interest, and frame rates be optimized. By default the axis of symmetry of a 2D image is vertical.
GE HEALTHCARE
DIRECTION FC091194, REVISION 11 VIVID 7 SERVICE MANUAL
4 - 38 Section 4-3 - Functional Checks
4-3-6-8 Check DDP, Diff, Power and Dynamic Range
Table 4-11 2D Mode: Check DDP, Diff, Power and Dynamic Range
StepTaskExpected Result(s)
1. Use the vertical arrows to select DDP (Data
Dependent Processing).
Use the horizontal arrows to adjust DDP. Performs temporal processing which reduces random
noise without affecting the motion of significant tissue
structures.
An index number is displayed in the status window
(under Proc) to indicate the relative DDP level.
2. Use the vertical arrows to select Diff.
Use the horizontal arrows to turn Diff On/Off. Affects the level of reverberations in the image.
When turned ON, the frame rate (or the number of
focal zones) will decrease,
while the reverberations
will be attenuated.
3.
Use the vertical arrows to select Power.
Use the horizontal arrows to adjust Power. Controls the amount of acoustic power applied in all
modes.
When power is set to maximum, it is equal to or less
than the maximum acoustic power permitted by the
FDA.
The Thermal Index (TI) and the Mechanical Index (MI)
are displayed on the screen.
4.
Use the vertical arrows to select Dynamic Range.
Use the horizontal arrows to adjust Dynamic Range.
Enables control of the dynamic range or contrast of
the image.
When Dynamic Range is set high, the image is softer
and more low-level data is visible.
GE HEALTHCARE DIRECTION FC091194, REVISION 11 VIVID 7 SERVICE MANUAL Chapter 4 - Functional Checks 4 - 39 4-3-7 M Mode Checks 4-3-7-1 Introduction 4-3-7-2 Preparations Use a phantom when doing these tests. 1.) Connect one of the probes, to the scanner’s left-most probe connector. -See 3-6-5 Probe Connection on page 3-21 for info about connecting the probes. -See Section 9-26 Probes on page 9-80 for available probes. 2.) Turn ON the scanner. -See see 4-2-2 Power ON/ Boot UP on page 4-3 for info about booting the scanner. The 2D Mode window is displayed (default mode). 3.) Press M-MODE to bring up an M-Mode picture on the screen.Figure 4-29 M-Mode Screen Example
GE HEALTHCARE DIRECTION FC091194, REVISION 11 VIVID 7 SERVICE MANUAL 4 - 40 Section 4-3 - Functional Checks 4-3-7-2 Preparations (cont’d) Figure 4-30 M Mode, Freeze and Cine Replay controls Exit Gain * Mode Dependant Keys Horizontal Sweep* Frequency Focus Contour Up/Down Color Maps Soft menu Compress Reject Dynamic Range Power Freeze Controls marked with * are also available in freeze and cine replay SteCurZoom Alt. PW CW TVI 2D MM Color Tra ck B al lU pd at e M e nu Act. Win Act. Mode Img. Size1/2/4 Menu Measure Exit Caliper Img. Store 2DAlt. R P Zoom Display zoom HR zoom Image size Small/large 2D sector top/bottom display side by side display M-Mode
GE HEALTHCARE
DIRECTION FC091194, REVISION 11 VIVID 7 SERVICE MANUAL
Chapter 4 - Functional Checks 4 - 41
4-3-7-3 Check Horizontal Sweep, Frequency, Focus and Contour
Table 4-12 M-Mode: Check Horizontal Sweep, Frequency, Focus and Contour
StepTaskExpected Result(s)
1. Adjust HORIZONTAL SWEEP
Adjusts the horizontal refresh rate of the M-Mode area
of the display.
Horizontal sweep does not change the acquisition
resolution, so you can change the horizontal sweep in
replay without any loss of quality.
2. Adjust FREQUENCY
Rotate the knob clockwise to increase the probe’s
operating frequency. The probe’s operating frequency is increased.
The selected frequency is displayed in the status
window.
For some probes/applications the lowest frequency
settings will be Octave imaging settings.
3. Adjust FOCUS
Changes the location of the focal point(s).
A triangular focus marker indicates the depth of the
focal point.
4.Adjust CONTOUR
Controls image processing related to the extent of edge
enhancement applied to an image.
GE HEALTHCARE DIRECTION FC091194, REVISION 11 VIVID 7 SERVICE MANUAL 4 - 42 Section 4-3 - Functional Checks 4-3-7-4 Check Compress, Reject, Power and Dynamic Range Table 4-13 M-Mode Soft menu Controls check StepTask Expected Result(s) 1. Adjust Compress Controls the amount of contrast in the image. An index number is displayed in the status window to indicate the relative level of compression. 2. Adjust Reject Adjust reject level. When Reject is increased, low-level echoes are rejected and appear darker in the image. An index number in the status window indicates the relative level of rejection. 3. Adjust Power Controls acoustic power in all modes. When power is set to maximum, it is equal to or less than the maximum acoustic power permitted by the FDA. Both Thermal Index (TI) and Mechanical Index (MI) are displayed on the screen. 4.Adjust Dynamic Range Enables control of the dynamic range or contrast of the image. When dynamic range is set to High, the image is softer and more low-level data is visible.
GE HEALTHCARE DIRECTION FC091194, REVISION 11 VIVID 7 SERVICE MANUAL Chapter 4 - Functional Checks 4 - 43 4-3-8 Color Mode Checks 4-3-8-1 Introduction Color Flow screens is 2D or M Mode screens with colors representing blood or tissue movement. Color Flow may be selected both from 2D mode or from M mode or a combination of these. 4-3-8-2 Preparations Use a phantom when doing these tests. 1.) Connect one of the probes, to the scanner’s left-most probe connector. -See Probe Connection on page 3-21 for info about connecting the probes. -See Chapter 9 - , section 9-26 for available probes. 2.) Turn ON the scanner. -See 4-2-2 - Power ON/ Boot UP on page 4-3 for info about booting the scanner The 2D Mode window is displayed (default mode). 4-3-8-3 Color 2D Mode Press COLOR . 4-3-8-4 Color M Mode 1.) Press MM (M Mode) to bring up an M Mode display on the screen. 2.) Press COLOR .
GE HEALTHCARE DIRECTION FC091194, REVISION 11 VIVID 7 SERVICE MANUAL 4 - 44 Section 4-3 - Functional Checks 4-3-8-4 Color M Mode (cont’d) Figure 4-31 Color Flow Mode Controls Exit Depth Gain * Mode Dependant Keys Horiz. sweep (Color M-Mode only) * Scale Baseline * LVR Invert * Variance * Color maps * Simultaneous (Color 2D only) Angio (Color 2D only) Cineloop (in Freeze, Color 2D mode only) Soft menu Sample Volume Tissue Priority * DDP (Color 2D only) * Frequency Frame rate Radial avg. Lateral avg. Power Freeze Controls marked with * are also available in freeze and cine replay ColorZoom TVI Zoom Display zoom HR zoom Image size (Color M-Mode) Small/large 2D sector top/bottom display side by side display
GE HEALTHCARE DIRECTION FC091194, REVISION 11 VIVID 7 SERVICE MANUAL Chapter 4 - Functional Checks 4 - 45 4-3-8-5 Check Horizontal Sweep, PRF, Baseline, LVR and Invert Table 4-14 Color Flow Mode Controls Check StepTask Expected Result(s) 1. Adjust Horizontal Sweep (Color M-Mode only) Adjusts the horizontal refresh rate of the M-Mode area of the display. 2. Adjust Baseline Adjusts the color map to emphasize flow either toward or away from the probe. Baseline is available in both Live and Freeze. 3. Change PRF (Pulse Repetition Frequency) Adjusts the repetition rate of the Doppler pulses transmitted to acquire the data for color flow mapping. The PRF (Nyquist limit) should be adjusted so that no aliasing occur, while still having a good resolution of velocities, meaning the Nyquist limit should be somewhat above the maximum velocity found in the data. 4.Adjust LVR (Low Velocity Rejection LVR, also called Wall Moti on Filter, enables the extent of low velocity removal to be adjusted. 5.Invert Enables the color scheme assigned to positive and negative velocities to be inverted. Invert is available in live and Cine Replay.
GE HEALTHCARE DIRECTION FC091194, REVISION 11 VIVID 7 SERVICE MANUAL 4 - 46 Section 4-3 - Functional Checks 4-3-8-6 Check Variance, Color Maps and Cineloop Table 4-15 Color Flow Mode: Check Variance, Color Maps and Cineloop StepTask Expected Result(s) 6. Adjust Variance Controls the amount of variance data added to a color display. Variance enables computer-aided detection of non- luminary flow (e.g. jets or regurgitation). Variance is available in live and cine replay. 7. Select Color Maps Displays a menu of color map options. Use the trackball to point to a color map and press SELECT to activate the desired color map. Each color map is assigning different color hues to different velocities. 8. Make Cineloop (in Freeze, Color 2D mode only) Starts cine loop acquisition.