GE Logiq P5 User Manual

Mode Measurements
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To view a worksheet (continued)
The system displays the worksheet for the current study. 
 Figure 7-33. OB Worksheet
To return to scanning, do one of the following:
• Select the Worksheet Display key. 
• Press Esc.
• Select the Exit button. 

General Measurements and Calculations
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To view a worksheet (continued)
To view a different worksheet, select the worksheet key for the 
desired worksheet. 
 Figure 7-34. Worksheet Display Touch Panel: OB Study
To view worksheet data for a particular mode, select the key for 
that mode. To view a worksheet with data for more than one 
mode, select Expand Worksheet.
If a worksheet has more data on a second page, to view the next 
page, adjust the...

Mode Measurements
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To edit a worksheet
To change data on a worksheet:
1.  To position the cursor at the field you want to change, move 
the Trackball.
The field is highlighted.
2. Press Set.
3.  Type the new data in the field.
The new data is displayed in blue to indicate that it was 
manually entered.
To delete or exclude data on a worksheet:
1.  To position the cursor at the field you want to delete or 
exclude, move the Trackball.
The field is...

General Measurements and Calculations
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Generic Measurements
Overview
Each exam category has a Generic study. The Generic studies 
provide you quick access to measurements such as volume, 
angle, A/B ratio, and % stenosis. The particular measurements 
available in each Generic study vary, depending on the exam 
category and the mode. This section describes generic 
measurements, organized by mode.
To access Generic studies:
1.  On the Control...

Generic Measurements
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B-Mode Measurements
In B-Mode, the Generic study includes the following 
measurements:
• % Stenosis
• Volume
• Angle
• A/B Ratio
 Figure 7-35. B-Mode Generic Study
NOTE:  The following instructions assume that you first scan the patient 
and then press Freeze. 

General Measurements and Calculations
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% Stenosis
You can calculate % Stenosis by diameter or by area.
Diameter
NOTE:  When you use diameter to calculate the %stenosis, always take 
the measurement from a cross-sectional view of the vessel.
To calculate percent stenosis by diameter:
1.  From the Generic Touch Panel, select % Stenosis. 
2. Select %sten(Diam).
The system displays an active caliper.
3.  Make a distance measurement of the inner area...

Generic Measurements
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% Stenosis (continued)
AreaTo calculate percent stenosis by area:
1.  From the Generic Touch Panel, select % Stenosis. 
2. Select %sten(Area).
The system displays a trace caliper.
3.  Make a trace measurement of the inner area of the blood 
vessel.
NOTE:  To erase an open trace, move the Trackball.
The system displays a second trace caliper. 
4.  Make a trace measurement of the outer area of the blood 
vessel.
The system...

General Measurements and Calculations
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Vo l u m e
The volume calculation can be made from any of the following 
measurements: 
• One distance
• Two distances
• Three distances
• One ellipse
•  One distance and one ellipse
For details on how to make a distance measurement, See 
‘Distance measurement’ for more information..
For details on how to make an ellipse measurement, See 
‘Circumference and area (ellipse) measurement’ for more...

Generic Measurements
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Volume (continued)
To make a volume calculation using one ellipse: 
1. Select Volume.
2.  Make one ellipse measurement.
3. Select Volume.
The system displays the ellipse measurement and the 
volume in the Results Window.
To make a volume calculation using one ellipse and one 
distance: 
1. Select Volume.
2.  Make one distance measurement and one ellipse 
measurement.
3. Select Volume.
The system displays the distance and...

General Measurements and Calculations
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Volume (continued)
 Figure 7-36. Volume Calculation Examples
1. One distance
2. Two distances
3. Three distances
4. One ellipse
5.  One distance and one ellipseTable 7-3: Volume Calculations
Calc NameInput Measurements
Volume (spherical) One distance
Volume (prolate spheroidal) Two distances, d1>d2
Volume (spheroidal) Three distances
Volume (prolate spheroidal) One ellipse: (d1 major axis, d2 minor axis)...