GE Logiq P5 User Manual

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Chapter 7
General Measurements and
Calculations
Describes how to perform general measurements and 
calculations. 

General Measurements and Calculations
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Introduction
Measurements and calculations derived from ultrasound images 
are intended to supplement other clinical procedures available 
to the attending physician. The accuracy of measurements is not 
only determined by system accuracy, but also by the use of 
proper medical protocols by the user. When appropriate, be sure 
to note any protocols associated with a particular measurement 
or calculation....

Introduction
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Exam workflow
For each patient, the system organizes information by exam 
category, study, and measurement. The definitions of these 
terms are as follows:
• Exam Category – the highest level of an ultrasound exam. 
Categories include the following:
• Abdomen
• Obstetrics
• Gynecology
• Cardiology
• Vascular
• Urology
• Small Parts
• Pediatrics
• Study – a logical grouping of measurements. After you 
choose an exam category, the...

General Measurements and Calculations
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Exam workflow (continued)
The following shows a workflow example for an obstetrics exam. 
For details on how to start a new patient, See ‘Beginning a New 
Patient’ for more information.
         NEW PATIENT
 (Exam Category)
Abdomen             OBSTETRICSGynecology Cardiology Pediatrics
(Study)
Generic                  OB-1OB-2/3 OB-General Fetal Heart
(Measurement)
                    GSCRL BPD FL 

Introduction
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Location of Measurement Controls
 Figure 7-1. Locating Measurement Controls
1. Measure. Activates a measurement caliper and the 
associated calculation package.
2. Set. Fixes the caliper for measurements and completes the 
measurement sequence.
3. Clear. During a measurement sequence, erases the 
measuring caliper and measurement data from the display. 
When not performing a measurement sequence, clears all 
calipers and measurements...

General Measurements and Calculations
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Description of calipers
While you are making a measurement, the measurement caliper 
is either active (open plus sign) or fixed (closed plus sign). An 
active caliper is yellow and a fixed caliper is green.
The system allows you to identify measurements by number or 
by unique symbol. If you choose Number as the Cursor Type, 
after you complete a measurement, it is assigned a number. If 
you choose Symbol as...

Introduction
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List of general measurements
The following table shows the types of general measurements 
available when you press Measure but do not choose a specific 
calculation. The type of measurement depends on the current 
scan mode and the number of times Measure is pressed.
NOTE:  The type of measurement repeats as you press Measure. For 
example, in M–Mode, when you press Measure the fourth time, 
the Tissue depth measurement is available,...

General Measurements and Calculations
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General Instructions
You can take measurements in all modes and image formats, 
including real-time, frozen, CINE, or VCR playback. After you 
select an exam category, the available calculations are 
displayed on the Touch Panel.
Measurement and calculation results
As you take measurements, each measurement is given a 
sequential number on the display and in the Results Window. 
The system can display nine...

Introduction
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Selecting a calculation (continued)
If there is a measurement listed in the Results Window that has 
not been assigned a calculation, to assign the measurement:
1. Press Measure.
2.  To select the measurement in the Results Window, move 
the Trackball to the measurement.
The measurement is highlighted.
3. Press Set.
The system displays a list of applicable calculations. For 
example, if it is a distance measurement, the list includes...

General Measurements and Calculations
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Specifying measurement and display options
The Options tab allows you to specify the following 
measurement and display options:
•  Whether to display the Results Window and Summary 
Window
•  The cursor size 
•  The number of heart rate cycles to use to calculate heart 
rate
•  Where to position the Results Window on the monitor 
display
•  Choose whether the Doppler waveform is automatically or 
manually...