GE Logiq P5 User Manual
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Mode Measurements LOGIQ 5 Basic User Manual 7-71 Direction 2300002-100 Rev. 2 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 7-72 LOGIQ 5 Basic User Manual Direction 2300002-100 Rev. 2 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 Page Change knob.
Mode Measurements LOGIQ 5 Basic User Manual 7-73 Direction 2300002-100 Rev. 2 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 highlighted. 2. Do one of the following: • To delete the field, select Delete Value. • To exclude the field, select Exclude Value. The data in the field is not visible and is not included in worksheet calculations. • To include a value that you previously excluded, select Exclude Value. To type a comment on a worksheet: 1. Select Examiner’s Comments. The Examiner’s Comments window opens. 2. Type comments about the exam. 3. To close the Examiner’s Comments window, select Examiner’s Comments. HINTSSome fields on the worksheet are view only, and others you can change or select. To easily see which fields you can change or select, move the Trackball. As the cursor moves over a field that you can change or select, the field is highlighted.
General Measurements and Calculations 7-74 LOGIQ 5 Basic User Manual Direction 2300002-100 Rev. 2 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 Panel, press Measure. 2. On the Touch Panel, select Exam Calcs. 3. On the Touch Panel, select the Generic folder. Calculation formulas are available in the Advanced Reference Manual.
Generic Measurements LOGIQ 5 Basic User Manual 7-75 Direction 2300002-100 Rev. 2 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 7-76 LOGIQ 5 Basic User Manual Direction 2300002-100 Rev. 2 % 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 of the blood vessel. The system displays an active caliper for the second distance measurement. 4. Make a distance measurement of the outer area of the blood vessel. The system displays each distance measurement and the % Stenosis in the Results Window. For details on how to make a distance measurement, See ‘Distance measurement’ for more information.. NOTE: For the diameter calculation, do NOT take a distance measurement from a longitudinal view. This may lead to an inaccurate assessment of % stenosis.
Generic Measurements LOGIQ 5 Basic User Manual 7-77 Direction 2300002-100 Rev. 2 % 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 displays the two area measurements and percent stenosis in the Results Window. See ‘Circumference and area (trace) measurement’ for more information.
General Measurements and Calculations 7-78 LOGIQ 5 Basic User Manual Direction 2300002-100 Rev. 2 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 information.. NOTE: IMPORTANT!! If you want to make a volume calculation using one or two distances, you must select Volume BEFORE you make the measurements. To make a volume calculation using one or two distances: 1. Select Volume. 2. Make one or two distance measurements. 3. Select Volume. The system displays the distances and the volume in the Results Window. To make a volume calculation using three distances: 1. Make three distance measurements. NOTE: Three distances should be done in the dual format mode (side by side images). One measurement is usually made in the sagittal plane and two measurements in the axial plane. To use the dual format mode, press the L or R key on front panel. 2. Select Volume. The system displays the distances and the volume in the Results Window.
Generic Measurements LOGIQ 5 Basic User Manual 7-79 Direction 2300002-100 Rev. 2 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 ellipse measurement and the volume in the Results Window. Calculation formulas are available in the ADVANCED- REFERENCE-MANUAL. HINTS• Volumes are most accurate when measurements are taken in the sagittal and axial scan planes. • To display sagittal and axial plane images simultaneously, use the side-by-side dual format option.
General Measurements and Calculations 7-80 LOGIQ 5 Basic User Manual Direction 2300002-100 Rev. 2 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) Volume (spheroidal) One distance d1, and one ellipse (d2 major axis, d3 minor axis) 12 3 45