Section 9.0
MAN 06–0017H
ZIEHM QUANTUM User’s Manual Page 125 of 220
9.0 CINE & DIGITAL SUBTRACTION MODE
DSA Mode of Subtracted Angiography
The DSA functionality.
9.1 DSA/CINE FUNCTIONS
Subtracted Dynamic Image Acquisition (DSA/CINE)
Digital Subtraction Angiography (DSA)
DSA is always performed by storing a sequence of images captured at a specified rate, between 1
to 15 Frames per second. The DSA function is used to acquire high quality dynamic subtracted
images, which is important when viewing Pain Management images of the spine and simple
peripheral injections.
When DSA is selected, the imaging system optimizes the CCD camera’s operating parameters for
subtracted image acquisition, and the imaging system selects values for LUT, Window/Level,
Noise Reduction, and other parameters which make the image suitable for DSA.
Frame Rates of 1 to 15 Frames Per Second (FPS) can be selected, depending on the options
included with the system and on the rate that is appropriate for the medical procedure.
During DSA the system will automatically display on the reference monitor a representative
native image with some of the DSA special settings for CCD camera, making the image on the
reference monitor a little flatter than a normal fluoroscopic image but provides a live native un
subtracted image during DSA acquisition. The subtracted (DSA) image will be displayed on the
live monitor. This provides the operator with both a live un-subtracted and subtracted image at
the same time.
Optionally: The user may have the service installer select in the service mode one of two Input
Look Up Tables and set Window and Level values to suit individual needs of image contrast and
brightness. Factory defaults are set to normal viewing range for most operators.
Optionally: When selected for operation, the DSA injection of the vascular anatomy is normally
fully opacified when the operator releases the foot switch or hand switch. The reference monitor
will continue to display the regions of the vascular anatomy that had the greatest contrast during
injection; this is considered a Maximum Opacified image.
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