User's Manual

Table Of Contents
Chapter 2: System Setup 23
Setup
contrastimages,andpositivenumbersshow
lowercontrastimages.
UnitsUnitsforpatientheightandweightin
cardiacexams:in/ft/lbsorcm/m/kg.
LanguageThesystemlanguage.Changingthe
languagerequiresrestartingthesystem.
Color SchemeThebackgroundcolorofthe
display.
Auto save Pat. FormAutomaticallysavesthe
patientinformationformasanimageinthe
patient’sfile.
System Information setup
TheSystemInformationsetuppagedisplays
systemhardwareandsoftwareversions,and
licenseinformation.
Seealso“Toenteralicensekey”onpage 72.
USB Devices setup
OntheUSBDevicessetuppage,youcanview
informationaboutconnectedUSBdevices,
includingspaceavailability.Youcanalsospecify
afileformatforimagesandclipsinpatientexams
thatyouexporttoaUSBstoragedevice.(See“To
exportpatientexamstoaUSBstoragedevice”on
page 38.)
To specify a file format for exported images
1 OntheUSBDevicessetuppage,selectExport.
2 UnderUSB Export,selectanexporttype:
SiteLinkorganizesfilesinaSiteLinkstyle
folderstructure.ClipsexportinH.264
videosavedasMP4files.Toviewthem,
SonoSiterecommendsQuickTime7.0or
later.
DICOMcreatesfilesreadablebyaDICOM
reader.
DICOMisanoptionalfeature.
3 Selectanimageformatforyourexporttype.
ForJPEGimageformat,alsoselectaJPEG
compression.(Seealso“LimitationsofJPEG
format.”)
Ahighcompressionhasasmallerfilesizebut
lessdetail.
ForSiteLinkexporttype,theimageformat
affectsonlystillimages.For
DICOMexport
type,theimageformataffectsbothstill
imagesandclips.
4 ForSiteLinkexporttype,selectasortorder
underSort By.
Toreturntothepreviousscreen,selectDevices.
Limitations of JPEG format
WhentransferringorexportingimagesinJPEG
format,thesystemuseslossycompression.Lossy
compressionmaycreateimagesthathaveless
absolutedetailthanBMPformatandthatdon’t
renderidenticallytotheoriginalimages.
Insomecircumstances,lossycompressedimages
maybeinappropriateforclinicaluse.For
example,ifyou
useimagesinSonoCalcIMT
software,youshouldtransferorexportthem
usingBMPformat.SonoCalcIMTsoftwareusesa
sophisticatedalgorithmtomeasureimages,and
lossycompressionmaycauseerrors.
Formoreinformationonusinglossycompressed
images,consultthe industryliterature,including
thefollowingreferences:
“PhysicsinMedicine
andBiology,Quality
AssessmentofDSA,UltrasoundandCT
DigitalImagesCompressedwiththeJPEG
Protocol,”DOkkalidesetal1994PhysMed
Biol3914071421doi:
10.1088/00319155/39/9/0 08
www.iop.org/EJ/abstract/00319155/39/9/008
“CanadianAssociationofRadiologists,CAR
StandardsforIrreversibleCompressionin
DigitalDiagnosticImagingwithin
Radiology,”Approved:June2008.
www.car.ca/Files/%5CLossy_Compression.
pdf