Electronic scanning-slit fluorography
Thesis/Dissertation
·
OSTI ID:6546998
A prototype slit scanner, that attaches to the x-ray tube collimator housing, was designed and constructed. It can be programmed to scan at preselected constant speed during pulsed x-ray exposures or in preselected stepping distances between individual pulses in a sequence of pulsed exposures. In the latter case the scanner is stationary during x-ray exposure pulses to minimize motion blurring or the slit edges. Imaging time of 1-2 seconds was achieved using multiple scanning slits. Small focal-spot size and large number of pixels are favored for higher dose utilization, shorter imaging time, and lower x-ray tube loading, as well as the for better spatial resolution. An image of a lung/chest phantom shows better visibility of low-contrast details, especially in poorly penetrated areas, when compared with the image obtained and displayed under the same conditions, but using a conventional grid to reject scattered radiation. Dual energy technique provides superior separation of bone and soft-tissue images if a more efficient scatter rejection method is used. Electronic scanning-slit fluorography was applied to digital subtraction angiography of a dog.
- Research Organization:
- Utah Univ., Salt Lake City (USA)
- OSTI ID:
- 6546998
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
550602* -- Medicine-- External Radiation in Diagnostics-- (1980-)
61 RADIATION PROTECTION AND DOSIMETRY
62 RADIOLOGY AND NUCLEAR MEDICINE
655003 -- Medical Physics-- Dosimetry
ANIMALS
BIOMEDICAL RADIOGRAPHY
BODY
BODY AREAS
CHEST
CONSTRUCTION
CONTRAST MEDIA
DESIGN
DIAGNOSTIC TECHNIQUES
DOGS
DOSES
ELECTROMAGNETIC RADIATION
IMAGE INTENSIFIERS
IONIZING RADIATIONS
LUNGS
MAMMALS
MEDICINE
MOCKUP
NUCLEAR MEDICINE
ORGANS
PHANTOMS
RADIATION DOSES
RADIATIONS
RADIOLOGY
RESOLUTION
RESPIRATORY SYSTEM
STRUCTURAL MODELS
VERTEBRATES
X RADIATION
61 RADIATION PROTECTION AND DOSIMETRY
62 RADIOLOGY AND NUCLEAR MEDICINE
655003 -- Medical Physics-- Dosimetry
ANIMALS
BIOMEDICAL RADIOGRAPHY
BODY
BODY AREAS
CHEST
CONSTRUCTION
CONTRAST MEDIA
DESIGN
DIAGNOSTIC TECHNIQUES
DOGS
DOSES
ELECTROMAGNETIC RADIATION
IMAGE INTENSIFIERS
IONIZING RADIATIONS
LUNGS
MAMMALS
MEDICINE
MOCKUP
NUCLEAR MEDICINE
ORGANS
PHANTOMS
RADIATION DOSES
RADIATIONS
RADIOLOGY
RESOLUTION
RESPIRATORY SYSTEM
STRUCTURAL MODELS
VERTEBRATES
X RADIATION