User's Manual

Chapter 4: Measurements 35
Measurements
Area and circumference measurements
Areaandcircumferencemeasurementsuseanellipsewithcalipers.Youcanmeasurethe
following:
•Areaincm
2
• Circumferenceincm
To measure area or circumference
1 Ona frozenimage,pressCalipers.
2 PressEllipse.
Note: Ifyouexceedtheallowednumberofmeasurements,Ellipseisnotavailabl e.
3 Usethetouchpad toadjustthesizeandpositionoftheellipse.Clickingtogglesbetween
positionandsize.
Tosavetheimagewiththemeasurementsdisplayed,see“Tosavean
image”onpage 28.
Measurement accuracy
Themeasurementsprovidedbythesystemdonotdefineaspecificphysiologicaloranatomical
parameter.Rather,themeasurementsareofaphysicalpropertysuchasdistanceforevaluation
bytheclinician.Theaccuracyvaluesrequirethatyoucanplacethecalipersoveronepixel.The
valuesdonotincludeacousticanomalies
ofthebody.
The2Dlineardistancemeasurementresultsaredisplayedincentimeterswithoneplacepast
thedecimalpoint,ifthemeasurementistenorgreater;twoplacespastthedecimalpoint,ifthe
measurementislessthanten.
Thelineardistancemeasurementcomponentshavetheaccuracyandrangeshown
inthe
followingtables.