Segmented attenuation correction for PET

Author

Fessler, Jeffrey A.

Author_Institution

Div. of Nucl. Med., Michigan Univ., Ann Arbor, MI, USA

fYear

1992

fDate

25-31 Oct 1992

Firstpage

1182

Abstract

The authors describe a hybrid measured/calculated method for attenuation correction in positron emission tomography (PET). This unified reconstruction/segmentation method is based on a penalized weighted least-squares objective function that is minimized using iterative coordinate-descent. Two penalty functions are compared: one for a discrete object parameterization, the other for a continuous parameterization. Simulations demonstrate that the methods can reduce the additional emission image variance typically introduced by noisy attenuation correction factors

Keywords

computerised tomography; medical image processing; radioisotope scanning and imaging; simulation; additional emission image variance; continuous parameterization; discrete object parameterization; hybrid measured/calculated method; iterative coordinate-descent; noisy attenuation correction factors; penalized weighted least-squares objective function; penalty functions; positron emission tomography; segmented attenuation correction; simulations; unified reconstruction/segmentation method; Attenuation measurement; Image reconstruction; Image segmentation; Iterative methods; Noise reduction; Nuclear measurements; Nuclear medicine; Positron emission tomography; Redundancy; Smoothing methods;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference, 1992., Conference Record of the 1992 IEEE

Conference_Location

Orlando, FL

Print_ISBN

0-7803-0884-0

Type

conf

DOI

10.1109/NSSMIC.1992.301040

Filename

301040