Edge Ultrasound System Betriebsanweisung Seite 35

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Seitenansicht 34
Chapter 2: System Setup 23
Setup
SiteLink organizes files in a SiteLink-style
folder structure. Clips export in H.264 video
saved as MP4 files. To view them, SonoSite
recommends QuickTime 7.0 or later.
DICOM creates files readable by a DICOM
reader. DICOM is an optional feature.
3 Select an image format for your export type. For
JPEG image format, also select a JPEG
compression. (See also “Limitations of JPEG
format.”)
A high compression has a smaller file size but
less detail.
For SiteLink export type, the image format
affects only still images. For DICOM export type,
the image format affects both still images and
clips.
4 For SiteLink export type, select a sort order
under Sort By.
To return to the previous screen, select Devices.
To include private tags
If you use DICOM export type and a SonoSite
software product, include private tags on the
images.
On the USB Devices setup page, select Include
private tags.
Note: Because the tags may be incompatible
with some earlier archivers, keep this check box
unselected unless you use SonoSite software
products. For more information, see the Edge
system’s
DICOM conformance statement.
Limitations of JPEG format
When transferring or exporting images in JPEG
format, the system uses
lossy compression.
Lossy
compression may create images that have less
absolute detail than BMP format and that don’t
render identically to the original images.
In some circumstances, lossy-compressed images
may be inappropriate for clinical use. For example, if
you use images in SonoCalc® IMT software, you
should transfer or export them using BMP format.
SonoCalc IMT software uses a sophisticated
algorithm to measure images, and lossy
compression may cause errors.
For more information on using lossy-compressed
images, consult the industry literature, including the
following references:
“Physics in Medicine and Biology, Quality
Assessment of DSA, Ultrasound and CT Digital
Images Compressed with the JPEG Protocol,” D
Okkalides et al 1994 Phys Med Biol 39
1407-1421 doi:
10.1088/0031-9155/39/9/008
www.iop.org/EJ/abstract/0031-9155/39/9/00
8
“Canadian Association of Radiologists, CAR
Standards for Irreversible Compression in Digital
Diagnostic Imaging within Radiology,”
Approved: June 2008.
www.car.ca/Files/%5CLossy_Compression. pdf
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