User's Manual

Table Of Contents
Chapter 4: Measurements and Calculations 61
Measurements
To trace IMT manually
InmanuallytracingIMT,theuserdefine sthe
location.
1 Onafrozen2Dimage,pressthe
CALCSkey
2 Fromthecalculationsmenu,selecta
measurementname.
3 SelectEditonscreen,andthenselectManual,
andthenselectSketch.
Asinglecaliperappears,andTraceappears
nexttothemeasurement.
4 Dothefollowingforthedesired
adventitiamediaboundaryandthenforthe
lumenintimaboundary:
a Positionthe
caliperatthebeginningofthe
boundary,andpressthe
SELECTkey.
b Usingthetouchpad,markpointsby
movingthecalipertothenextdesired
pointandpressingthe
SELECTkey.
Tomakeacorrection,selectUndo
onscreenorpressthe
BACKSPACEkeyto
deletethelastsegment.
c Pressthe
SETkeytocompletethetraceline.
5 Savethecalculation.(See“Tosavea
calculation”onpage 45.)
To sketch IMT
TheIMTsketchmeasurement involvestwo
userdefinedsketchlinesthatyoucanadjust
manually.
1 Onafrozen2Dimage,pressthe
CALCSkey
2 Fromthecalculationsmenu,selecta
measurementname.
3 SelectEditonscreen,andthenselectManual.
Asinglecaliperappearsonscreen,andSketch
appearsnexttothemeasurement.
4 Dothefollowingforthedesired
adventitiamediaboundaryandthenforthe
lumenintimaboundary:
a Positionthecaliperat
thebeginningofthe
boundaryandpressthe
SELECTkey.
b Usingthetouchpad,markpointsby
movingthecalipertothenextdesired
pointandpressingthe
SELECTkey.
Tomakeacorrection,selectUndo
onscreenorpressthe
BACKSPACEkeyto
deletethelastsegment.
c Pressthe
SETkeytocompletethetraceline.
d Ifnecessary,adjustoreditthe
measurement.See“IMTtooloptions”on
page 60.
e Savethecalculation.(See“Tosavea
calculation”onpage 45.)
OB calculations
EFWiscalculatedonlyafterappropriate
measurementsarecompleted.Ifany oneofthese
parametersresultsinanEDDgreaterthanwhat
theOBcalculationtablesprovide,theEFWisnot
displayed.
WARNING:
Make sure that you have selected
the OB exam type and the OB
author for the OB calculation table
you intend to use. See “Results from
System-Defined OB Measurements
and Table Authors” on page 62.
To avoid incorrect obstetrics
calculations, verify with a local
clock and calendar that the systems
date and time settings are correct
before each use of the system. The
system does not automatically
adjust for daylight savings time
changes.