Data-dependent bandwidth selection for emission computed tomography reconstruction

Journal Article · Tue Jun 01 04:00:00 EDT 1993 · IEEE Transactions on Medical Imaging (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/42.232245· OSTI ID:6012051

Pawitan, Y ^[1]; O'Sullivan, F ^[2]

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1. Univ. College, Dublin (Ireland). Dept. of Statistics
2. Univ. of Washington, Seattle, WA (United States). Dept. of Statistics

At present, the choice of bandwidth in emission computed tomography (ECT) reconstruction is done by subjective means. Here the authors develop an automated objective selection technique for linear reconstruction algorithms such as filtered backprojection. The approach is based on the method of unbiased risk estimation. A set of 2-dimensional validation studies using computer simulated and physical phantom data from the Hoffman et al. brain phantom are then carried out. These 2-dimensional studies incorporate measured corrections for object attenuation and lack of uniformity in detector sensitivity. They find that the unbiased risk approach works very well. Over a range of count rates and brain slice source distributions, the root mean square (rms) error of the fully automated reconstruction, with the data-dependent choice of bandwidth, is around 5 percent greater than the rms error for the reconstruction with an ideal choice of the bandwidth.

• DOE Contract Number: FG06-85ER25006
• OSTI ID: 6012051
• Journal Information: IEEE Transactions on Medical Imaging (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Medical Imaging (Institute of Electrical and Electronics Engineers); (United States) Vol. 12:2; ISSN 0278-0062; ISSN ITMID4
• Country of Publication: United States
• Language: English

Related Subjects

550601* -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
ACCURACY
ALGORITHMS
BIOMEDICAL RADIOGRAPHY
BODY
BRAIN
CENTRAL NERVOUS SYSTEM
COMPUTERIZED SIMULATION
COMPUTERIZED TOMOGRAPHY
DATA COVARIANCES
DIAGNOSTIC TECHNIQUES
EMISSION COMPUTED TOMOGRAPHY
MATHEMATICAL LOGIC
MEDICINE
MOCKUP
NERVOUS SYSTEM
NUCLEAR MEDICINE
ORGANS
PHANTOMS
RADIOLOGY
SIMULATION
STRUCTURAL MODELS
TOMOGRAPHY