GE Logiq P5 User Manual

							Pediatrics Calculations
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Pediatrics Calculations
Overview
Pediatrics measurements offer two different types of 
measurement studies:
•  Generic. The Generic Calculations study is common to all 
applications. See ‘Generic Measurements’ for more 
information.
• Pediatrics. 
•  This chapter describes Pediatrics B-Mode 
measurements.
•  The Pediatrics M-Mode measurements are common to 
other applications. See ‘M-Mode Measurements’ for 
more information. 
•  The Pediatrics Doppler measurements are common to 
other applications. See ‘Doppler Mode Measurements’ 
for more information. 
						

							Pediatrics
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Pediatrics
B-Mode Measurements
 Figure 13-1. Pediatrics B-Mode Measurement Touch Panel
The following generic measurements are common to other 
exam applications:
• %Stenosis
• Volume
• Angle
• A/B Ratio
See ‘B-Mode Measurements’ for more information. 
						

							Pediatrics Calculations
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B-Mode Measurements (continued)
Hip Dysplasia
MeasurementThe HIP calculation assists in assessing the development of the 
infant hip. In this calculation, three straight lines are 
superimposed on the image and aligned with the anatomical 
features. The two angles are computed, displayed, and can be 
used by the physician in making a diagnosis.
The three lines are:
1
1.  The baseline connects the osseous acetabulum convexity to 
the point where the joint capsule and the perichondrium 
unite with the iliac bone.
2.  The inclination line connects the osseous convexity to 
labrum acetabulare.
3.  The Acetabulum roof line connects the lower edge of the 
osilium to the osseous convexity.
The α (Alpha) angle is the supplement of the angle between 1 
and 3. It characterizes the osseous convexity. The β (Beta) 
angle is the angle between lines 1 and 2. It characterizes the 
bone supplementing additional roofing by the cartilaginous 
convexity.
 Figure 13-2. Hip Dysplasia 
1Source: R GRAF, journal of Pediatric Orthopedics, 4: 735-
740(1984)
Anatomical Landmarks
a. Ilium d. Bony Roof
b. Iliac Bone e. Cartilaginous acetabular roof
c. Labrum f. Femoral Head 
						

							Pediatrics
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B-Mode Measurements (continued)
Hip Dysplasia
Measurement
(continued)To make a Hip Dysplasia measurement: 
MeasureFrom the Touch Panel, select HIP. 
A horizontal dotted line displays. 
To place the baseline, move the Trackball. Position the crosshairs edge at the 
osseous convexity of the ilium.
To rotate or change inclination, adjust the Ellipse control or the Hip 
Orientation knob. 
SetTo fix the baseline, press Set. 
The system displays a second dotted line at an angle.
To place the line along the inclination line of the osseous convexity to labrum 
acetabulare, move the Trackball. 
To rotate or change inclination, adjust the Ellipse control or the Hip 
Orientation knob. 
SetTo fix the second measurement line, press Set.
The system displays a third dotted line at an angle. 
						

							Pediatrics Calculations
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B-Mode Measurements (continued)
Hip Dysplasia
Measurement
(continued)
To place the caliper along the acetabular roof line, move the Trackball. 
To rotate or change inclination, adjust the Ellipse control or the Hip 
Orientation knob. 
SetTo fix the third measurement line and complete measurement, press Set. 
The system displays the hip measurements (α and β) in the Results Window. 
						

							Pediatrics
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B-Mode Measurements (continued)
Alpha HIPThe Alpha HIP measurement measures the angle between the 
iliac baseline and the bony roof line. To make an Alpha HIP 
measurement: 
MeasureFrom the Touch Panel, select Alpha HIP. 
A horizontal dotted line displays. 
To place the baseline, move the Trackball. Position the crosshairs edge at the 
osseous convexity of the ilium.
To rotate or change inclination, adjust the Ellipse control or the Hip 
Orientation knob.
SetTo fix the baseline, press Set. 
The system displays a second dotted line at an angle. 
To place the caliper along the acetabular roof line, move the Trackball.
To rotate or change inclination, adjust the Ellipse control or the Hip 
Orientation knob. 
SetTo fix the second measurement line, press Set. 
The system displays the alpha hip measurement (α) in the Results Window. 
						

							Pediatrics Calculations
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B-Mode Measurements (continued)
d:D Ratio
MeasurementThe d:D Ratio measurement measures the percentage of the 
femoral head coverage under the bony roof. To make this 
measurement:
MeasureFrom the Touch Panel, select d:D Ratio. 
A horizontal dotted line displays. 
Use the Trackball to place the baseline along the ilium. Position the crosshairs 
edge at the osseous convexity of the ilium.
Use the Ellipse control or the Hip Orientation Touch Panel knob to adjust or 
change inclination. 
SetPress Set to fix the baseline. 
The system displays a circle representing the femoral head. Use the Trackball 
to position the circle.
Use the Ellipse control to size the femoral head circumference.
SetPress Set to fix the femoral head circumference. 
The system displays the d:D ratio for the femoral head in the Results Window. 
						

							Pediatrics
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Chapter 14
Report Generation
Describes how to generate reports. 
						

							Report Generation
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