A practical attenuation compensation method for cone beam spect
Conference
·
· IEEE Trans. Nucl. Sci.; (United States)
OSTI ID:6706050
An algorithm for attenuation compensation of cone beam SPECT images has been developed and implemented. The algorithm is based on a multiplicative post-processing method previously used for parallel and fan beam geometries. This method computes the compensation from the estimated average attenuation of photons originating from each image pixel. In the present development, a uniform attenuation coefficient inside of the body contour is assumed, although the method could be extended to include a non-uniform attenuation map. The algorithm is tested with experimental projections of a phantom obtained using a cone beam collimator. Profiles through the reconstructed images are presented as a quantitative test of the improvement due to the compensation. The algorithm provides adequate compensation for attenuation in a simple uniform cylindrical phantom, and the computational time is short compared to that expected for iterative reconstruction techniques. Also observed are image distortions in some reconstructed slices when the source distribution extends beyond the edge of the cone beam axial field-of-view.
- Research Organization:
- Dept. of Radiology, Box 3949, Duke Univ. Medical Center, Durham, NC 27710
- OSTI ID:
- 6706050
- Report Number(s):
- CONF-861007-
- Conference Information:
- Journal Name: IEEE Trans. Nucl. Sci.; (United States) Journal Volume: NS-34:1
- Country of Publication:
- United States
- Language:
- English
Similar Records
Analytical fan-beam and cone-beam reconstruction algorithms withuniform attenuation correction for SPECT
Attenuation maps for SPECT determined using cone beam transmission computed tomography
Exact fan-beam and 4{pi}-acquisition cone-beam SPECT algorithms with uniform attenuation correction
Journal Article
·
Wed Jun 22 00:00:00 EDT 2005
· Physics in Medicine and Biology
·
OSTI ID:861025
Attenuation maps for SPECT determined using cone beam transmission computed tomography
Conference
·
Sat Mar 31 23:00:00 EST 1990
· IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (USA)
·
OSTI ID:6609198
Exact fan-beam and 4{pi}-acquisition cone-beam SPECT algorithms with uniform attenuation correction
Journal Article
·
Mon Nov 14 23:00:00 EST 2005
· Medical Physics
·
OSTI ID:20726908
Related Subjects
550602* -- Medicine-- External Radiation in Diagnostics-- (1980-)
62 RADIOLOGY AND NUCLEAR MEDICINE
ALGORITHMS
ATTENUATION
COLLIMATORS
COMPUTERIZED TOMOGRAPHY
DATA PROCESSING
DIAGNOSTIC TECHNIQUES
ELEMENTARY PARTICLES
EMISSION COMPUTED TOMOGRAPHY
IMAGE PROCESSING
IMAGES
ITERATIVE METHODS
MAPS
MASSLESS PARTICLES
MATHEMATICAL LOGIC
MOCKUP
PHANTOMS
PHOTONS
PROCESSING
SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY
STRUCTURAL MODELS
TIME DEPENDENCE
TOMOGRAPHY
62 RADIOLOGY AND NUCLEAR MEDICINE
ALGORITHMS
ATTENUATION
COLLIMATORS
COMPUTERIZED TOMOGRAPHY
DATA PROCESSING
DIAGNOSTIC TECHNIQUES
ELEMENTARY PARTICLES
EMISSION COMPUTED TOMOGRAPHY
IMAGE PROCESSING
IMAGES
ITERATIVE METHODS
MAPS
MASSLESS PARTICLES
MATHEMATICAL LOGIC
MOCKUP
PHANTOMS
PHOTONS
PROCESSING
SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY
STRUCTURAL MODELS
TIME DEPENDENCE
TOMOGRAPHY