Quantitative cardiac SPECT reconstruction with reduced image degradation due to patient anatomy
- Univ. of North Carolina, Chapel Hill, NC (United States)
Patient anatomy has complicated effects on cardiac SPECT images. The authors investigated reconstruction methods which substantially reduced these effects for improved image quality. A 3D mathematical cardiac-torso (MCAT) phantom which models the anatomical structures in the thorax region were used in the study. The phantom was modified to simulate variations in patient anatomy including regions of natural thinning along the myocardium, body size, diaphragmatic shape, gender, and size and shape of breasts for female patients. Distributions of attenuation coefficients and Tl-201 uptake in different organs in a normal patient were also simulated. Emission projection data were generated from the phantoms including effects of attenuation and detector response. The authors have observed the attenuation-induced artifacts caused by patient anatomy in the conventional FBP reconstructed images. Accurate attenuation compensation using iterative reconstruction algorithms and attenuation maps substantially reduced the image artifacts and improved quantitative accuracy. They conclude that reconstruction methods which accurately compensate for non-uniform attenuation can substantially reduce image degradation caused by variations in patient anatomy in cardiac SPECT.
- OSTI ID:
- 6705193
- Report Number(s):
- CONF-931051-; CODEN: IETNAE
- Journal Information:
- IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States), Vol. 41:6Pt2; Conference: NSS-MIC '93: nuclear science symposium and medical imaging conference, San Francisco, CA (United States), 30 Oct - 6 Nov 1993; ISSN 0018-9499
- Country of Publication:
- United States
- Language:
- English
Similar Records
Reconstruction of truncated TCT and SPECT data from a right-angle dual-camera system for myocardial SPECT
Limited-angle effect compensation for respiratory binned cardiac SPECT
Related Subjects
CHEST
SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY
HEART
ACCURACY
ATTENUATION
IMAGE PROCESSING
PHANTOMS
QUALITY CONTROL
THALLIUM 201
BETA DECAY RADIOISOTOPES
BODY
BODY AREAS
CARDIOVASCULAR SYSTEM
COMPUTERIZED TOMOGRAPHY
CONTROL
DAYS LIVING RADIOISOTOPES
DIAGNOSTIC TECHNIQUES
ELECTRON CAPTURE RADIOISOTOPES
EMISSION COMPUTED TOMOGRAPHY
HEAVY NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MOCKUP
NUCLEI
ODD-EVEN NUCLEI
ORGANS
PROCESSING
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
STRUCTURAL MODELS
THALLIUM ISOTOPES
TOMOGRAPHY
550601* - Medicine- Unsealed Radionuclides in Diagnostics