Digital subtraction angiography applied to peripheral runoff studies
Thesis/Dissertation
·
OSTI ID:5658837
Peripheral runoff studies are one of the most common, yet one of the most painful, of angiographic studies. Digital subtraction followed by image contrast enhancement can help reduce both the pain and the risk associated with angiographic examinations by reducing the amount of iodine contrast media required to view the vasculature being studied. Unfortunately, conventional digital subtraction techniques require one iodine injection for each view. Although pain is reduced, the total amount of the toxic iodine injected is not. In addition, multiple injection techniques might increase the total time required to perform the study. Thus, there is great incentive to perform peripheral angiographic studies using digital subtraction via a single injection for multiple views. Single injection, multiple view peripheral angiography possesses many technical difficulties. Patient motion and positioning inaccuracies can significantly reduce the quality of the subtracted images. Although patient motion can be significantly reduced in the periphery by appropriate restraints and instructions to the patients, positioning errors between the mask and contrast frames can lead to uncorrectable misregistration artifacts due to the effects of parallax. Continuously sweeping the imaging chain along the length of the legs might prove advantageous, as it reduces the time wasted while waiting for a stepping table to get to its next position and stop vibrating. However, a continuous sweep would introduce blurring in the image. To test the feasibility of digital acquisition during continuous sweeping in peripheral runoff studies, a pilot system was built by interfacing a conventional moving table fluoroscopy system to a digital acquisition system and a control computer. Images were acquired at preselected positions while panning the table during the study period.
- Research Organization:
- Utah Univ., Salt Lake City, UT (USA)
- OSTI ID:
- 5658837
- Country of Publication:
- United States
- Language:
- English
Similar Records
Intra-arterial digital subtraction angiography of the spinal cord
Digital subtraction angiography in extremity trauma
Work in progress. Intra-arterial digital subtraction angiography: evaluation in 150 patients
Conference
·
Wed May 01 00:00:00 EDT 1985
· Radiology; (United States)
·
OSTI ID:5482090
Digital subtraction angiography in extremity trauma
Conference
·
Mon Oct 01 00:00:00 EDT 1984
· Radiology; (United States)
·
OSTI ID:6444709
Work in progress. Intra-arterial digital subtraction angiography: evaluation in 150 patients
Journal Article
·
Fri Jul 01 00:00:00 EDT 1983
· Radiology; (United States)
·
OSTI ID:5819501