Compton-backscattering x-ray source for coronary angiography
An X-ray source utilizing Compton-backscattered (CB) photons in a 75-MeV electron storage ring containing an infrared FEL is proposed for producing 33.17-keV X-rays (Iodine K-edge) for coronary angiography. The X-ray intensity into a 4-mrad cone is computed as 7.21 [times] 10[sup 14]/sec for a 500-mA electron beam colliding with 0.2-J/bunch, 3.22-[mu]m photons from an in-ring IR-FEL at the 353.21-MHz rate of a SLAC-PEP 500-kW RF system. The resultant average flux at the patient is 6.4 [times] 10[sup 7] photons/pixel/4-msec aver a 12-cm diameter circle at 3-m from the interaction point for the 0.5 [times]0.5-mm[sup 2] pixel size of the present Si(Li) array of the BNL-SMERF Angiography Facility. This flux is 2.1 times larger than obtains at SMERF at a comparable source-to-patient distance and over an area sufficient to encompass the entire coronary region. However, the X-Ray energy spread due to kinematics alone is 2.63-keV, a factor of 35 larger then SMERF, and presents the major difficulty for the digital subtraction angiography method (DSA) envisioned.
- Research Organization:
- Brookhaven National Lab., Upton, NY (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 7136250
- Report Number(s):
- BNL-48016; CONF-921116-13; ON: DE93003473
- Resource Relation:
- Conference: 12. international conference on the application of accelerators in research and industry, Denton, TX (United States), 2-5 Nov 1992
- Country of Publication:
- United States
- Language:
- English
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BIOMEDICAL RADIOGRAPHY
RADIATION SOURCES
COMPTON EFFECT
CORONARIES
RADIATION FLUX
STORAGE RINGS
ARTERIES
BASIC INTERACTIONS
BLOOD VESSELS
BODY
CARDIOVASCULAR SYSTEM
DIAGNOSTIC TECHNIQUES
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
INTERACTIONS
MEDICINE
NUCLEAR MEDICINE
ORGANS
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SCATTERING
550602* - Medicine- External Radiation in Diagnostics- (1980-)