Effects of spatial resolution and spectral purity on transvenous coronary angiography images
- and others
Measurements have been made on the National Synchrotron Light Source (NSLS) Coronary Angiography X17B2 beamline under ideal and real imaging conditions to investigate the optimal imaging conditions for spatial resolution and spectral purity. The spatial resolution tests were performed using two multielement Si(Li) detectors (600 element, 0.5mm, pixel-pixel spacing; 1200 element, 0.25mm pixel-pixel spacing. Images were taken of phantoms containing iodine contrast agent over a wide range of incident beam absorption conditions. Patient images were also obtained using the same viewing projection with both detectors. Harmonics present in the imaging beam can be reduced by operating the superconducting wiggler source at reduced field strength. At regions of high absorption in the patient, the harmonics present can contribute to the detected signal. Iodine phantom images were obtained at a wiggler field strength of 3 Tesla (E{sub c}=13.3keV) and 4 Tesla (E{sub c}= I 7.8keV) for comparison. As before, patient images were obtained using the same projection at both wiggler fields. Results of the detector resolution and wiggler eld measurements will be presented for the phantoms as well as the patient scans.
- Research Organization:
- Brookhaven National Lab., Upton, NY (United States); Stanford Univ., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016; FG03-87ER60527
- OSTI ID:
- 10192151
- Report Number(s):
- BNL-60861; CONF-940714-38; ON: DE95002191; HA0207010/KP0401000
- Resource Relation:
- Conference: 5. international meeting on synchrotron radiation instrumentation,Stony Brook, NY (United States),18-22 Jul 1994; Other Information: PBD: [1994]
- Country of Publication:
- United States
- Language:
- English
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