GE Vivid 7 Service Manual

							
GE HEALTHCARE
DIRECTION FC091194, REVISION 11    VIVID 7 SERVICE MANUAL 
Chapter 4 - Functional Checks 4 - 57
4-3-11 Tissue Velocity Imaging (TVI) Checks
4-3-11-1 Introduction TVI calculates and color codes the velocities in tissue. The tissue velocity information is acquired by 
sampling of tissue Doppler veloci ty values at discrete points.
4-3-11-2 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 , page 3-21 for info about connecting the probes
-See  Probes, 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.) If needed, adjust the Display’s  Brightness and Contrast setting. 
4.) Press  TVI
. 
						

							
GE HEALTHCARE
DIRECTION FC091194, REVISION 11    VIVID 7 SERVICE MANUAL 
4 - 58 Section 4-3 - Functional Checks
4-3-11-2      Preparations (cont’d) Figure 4-34   Doppler Mode Controls
Mode Dependant Keys
2D Width
Scale
Transparency
Threshold
Invert *
Tissue Tracking
Simultaneous *
Cineloop (Freeze only)
Color Maps
Soft menu
Tissue Priority *
Frame Rate
Compress *
Reject *
Frequency
Lateral Average
Radial Average
Baseline *
Power
TVI
Freeze
2D
Alt.
Alternatives
Anat. M-Mode
Curved Anat. M-Mode
Zoom
Display zoom
HR zoom
Controls marked with * (asterisk) are  also available in freeze and cine replay 
						

							
GE HEALTHCARE
DIRECTION FC091194, REVISION 11    VIVID 7 SERVICE MANUAL 
Chapter 4 - Functional Checks 4 - 59
4-3-11-3 Check 2D Width, Scale,  Transparency and Threshold
  
Table 4-23    TVI Mode Controls Checks
StepTaskExpected Result(s)
1. Adjust 2D WIDTH
Controls the size or angular width of the 2D sector. 
2. Adjust  SCALE
Controls the repetition rate of the Doppler pulses 
transmitted to acquire the data for color mapping. 
The scale value influences the Nyquist limit (the ability 
to detect maximal velocity without color aliasing.
3. Adjust  TRANSPARENCY
Controls the degree of transparency of the TVI color.
4.Adjust THRESHOLD.
Controls the level of greyscal e intensity that is used as 
a threshold for color. 
						

							
GE HEALTHCARE
DIRECTION FC091194, REVISION 11    VIVID 7 SERVICE MANUAL 
4 - 60 Section 4-3 - Functional Checks
4-3-11-4 Check Invert, Tissue Tracking, Simultaneous and Color Maps  
  
Table 4-24    TVI Mode Controls Checks
St e pTa s kExpected Result(s)
5. Press  INVERT
 
Enables the color scheme assigned to positive and 
negative tissue velocities to be inverted. 
Invert is available in live and cine replay.
6. Press  TISSUE TRACKING
 
Starts Tissue Tracking mode.
7. Choose  COLOR MAPS
Displays a drop down menu of different colorization 
maps.
Use the trackball to select the desired map and press 
Select to activate the map. 
						

							
GE HEALTHCARE
DIRECTION FC091194, REVISION 11    VIVID 7 SERVICE MANUAL 
Chapter 4 - Functional Checks 4 - 61
4-3-11-5 Check Tissue Priority, Frame Rate, Compress, Reject, Frequency, Lateral & Radial Average,  Baseline and Power
    
Table 4-25    TVI Mode: Soft Menu Controls Check 
StepTask Expected Result(s)
8. Adjust  TISSUE PRIORITY 
Emphasizes either the color of the TVI or the greyscale 
tissue detail of the 2D image.
Tissue priority is avail able in both Live and Freeze.
9. Adjust  FRAME RATE
 
Controls the line density. When adjusting frame rate, 
there is a trade off between spatial and temporal 
resolution.
10. Adjust  COMPRESS
 
Controls the amount of color compression. The color 
bar is adjusted accordingly.
11.Adjust REJECT 
Adjust the cut-off level for the low velocity of TVI to be 
discarded when generating the color image.
12.Adjust  FREQUENCY 
Enables the adjustment of  the transmission frequency 
to control the sensitivity or the level of penetration. 
						

							
GE HEALTHCARE
DIRECTION FC091194, REVISION 11    VIVID 7 SERVICE MANUAL 
4 - 62 Section 4-3 - Functional Checks
13.Adjust  LATERAL AVERAGE 
Smooths the image by averaging collected data along 
the same horizontal line. An increase of the lateral 
averaging will reduce noise, but  this will also reduce the 
lateral resolution.
14. Adjust  RADIAL AVERAGE
 
Smooths the image by averaging collected data along 
the same radial line. An increase of the radial 
averaging will reduce noise, but  this will also reduce the 
radial resolution.
15. Adjust  BASELINE
 
Adjusts the color map to emphasize tissue motion 
either toward or away from the probe.
Baseline is available in both Live and Freeze.
16. 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 level permitted 
by regulatory standards.
The Thermal Index (TI) and the Mechanical Index (MI) 
are displayed on the screen.
Table 4-25    TVI Mode: Soft Menu Controls Check 
StepTask Expected Result(s) 
						

							
GE HEALTHCARE
DIRECTION FC091194, REVISION 11    VIVID 7 SERVICE MANUAL 
Chapter 4 - Functional Checks 4 - 63
4-3-12 Contrast Checks
Refer to Chapter 5 in Vivid 7 User Manual.
4-3-13 Stress Echo
Refer to Chapter 4 in Vivid 7 User Manual. 
						

							
GE HEALTHCARE
DIRECTION FC091194, REVISION 11    VIVID 7 SERVICE MANUAL 
4 - 64 Section 4-3 - Functional Checks
4-3-14 Measurements and Multi Image Checks
4-3-14-1 Introduction to Measurements & Analysis (M&A) • A complete M&A software package for  Cardiac is included in the Vivid 7. 
• The M&A software runs on the Back-End Processor.
• In this test, we just check one measurement, Calipers.
4-3-14-2 Preparations, M&A Figure 4-35   Measurement Keys
Table 4-26     Measurement Key Checks
StepTask Expected Result(s)
1. Generate a 2D image 
(see 4-3-6 - 2D Mode (B mode) Checks  for details).A 2D image is active on the screen
2. Press FREEZE
 on the Operator Panel The last scanned picture is on the screen.
3. Scroll back until you find the picture you want to do the 
measurement on. The picture of interest is on the screen.
F
 1F  2F  3F  4
Measure
Assign and Measure
Measure and Assign
Caliper
Measure and Assign
(when in measure 
mode))
Menu
Fast access to the 
Measurement menu
(when in measure mode) 
						

							
GE HEALTHCARE
DIRECTION FC091194, REVISION 11    VIVID 7 SERVICE MANUAL 
Chapter 4 - Functional Checks 4 - 65
4-3-14-3 Check Caliper Measurement, Distance
4-3-14-4 Check Post-measurement assignment labels
   
Table 4-27     Measurement Key Checks
StepTask Expected Result(s)
4. Press MEASURE
 on the Operator Panel.
Select  Caliper  in the Measurement menu.
or
Press  CALIPER
 on the Operator Panel.
Press the  CALIPER
 mode dependant button The Measurement menu with a list of studies is 
displayed in the Parameters window on the screen. 
When entering the Measurement mode for the first 
time, the Caliper tool is selected by default. 
When re-entering the Measurement mode, the first 
measurement in the actual study that has not been 
performed is selected by default.
5. Use the Trackball to move the cursor to the start point 
of the measurement. The cursor points to the start point for the 
measurement.
6. Press SELECT
 to anchor the start point of the 
measurement. The start point of the measurement is marked, and a 
line between the mark and the active cursor indicates 
the distance.
7.Use the trackball to move the cursor to the end point of 
the measurement.The current distance value is displayed in the 
Measurement result table and is instantaneously 
updated when moving the cursor.
8.
Press 
SELECT to mark the end point for the 
measurement.
The measurement display color on the 2D image 
changes from green to red after completion of the 
measurement.
The measurement result is displayed in the 
Measurement result table.
9.Trackball to the measurement result in the 
Measurement result table.The highlighted parameter label is assigned to the 
measurement. 
Table 4-28     Post-measurement assignment labels
StepTask Expected Result(s)
10. Trackball to the actual measurement in the 
Measurement Result Window.
Press SELECT
 on the Operator Panel. A Parameter menu is displayed.
11. Trackball through the Parameter label menu to 
highlight the desired label.
Press  SELECT
 on the Operator Panel. The highlighted parameter label is assigned to the 
measurement. 
						

							
GE HEALTHCARE
DIRECTION FC091194, REVISION 11    VIVID 7 SERVICE MANUAL 
4 - 66 Section 4-3 - Functional Checks
4-3-15 Multi Image Checks
4-3-15-1 Introduction to Multi Image This unit has a special function for displaying tw o or four examination pictures at the same time
 
4-3-15-2 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 , page 3-21 for info about connecting the probes
-See  Probes, page 9-80 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).
If needed, adjust the Display’s Brightness and Contrast setting.
3.) Store four cineloops.
4-3-15-3 1,2,4
 Key Check
   
Table 4-29    Use of Multi Image Key
KeyDescription
Enables multiple image display windows in which tw o or four images can be viewed simultaneously. 
When reducing the number of images, the  active window will always be kept.
Table 4-30     Multi Image Checks
StepTaskExpected Result(s)
1.
Press the 1,2,4 Key once to display two images on the 
screen. 2 Images are displayed on the screen.
2. Press the 1,2,4
 Key once more to display four images 
on the screen. 4 Images are displayed on the screen.
3. Press the 1,2,4
 Key again to reduce the number of 
images on the screen. 1 image is displayed on the screen.
1/2/4