Comparison of NEC and subjective image quality measures in 2D and 3D whole-body PET imaging

Author

Wollenweber, S.D. ; Kohlmyer, S.G. ; Stearns, C.W.

Author_Institution

Gen. Electr. Med. Syst., Milwaukee, WI, USA

Volume

3

fYear

2002

fDate

10-16 Nov. 2002

Firstpage

1393

Abstract

Twelve clinical 3D whole-body PET studies have been used to compute noise-effective counts (NEC) for comparison with observer study results. Clinical data was collected using data acquired on a GE Advance™ PET imaging system. Data acquisition for the studies was performed by acquisition of multi-frame 2D & 3D emission data along with a transmission scan. Patient weights ranged from 112 lb to 320 lb (average=178 lb); injected activity ranged from 7.7-12.9mCi (average=10.1); 2D and 3D post-injection frame acquisition start times averaged 74 and 125 minutes respectively. NEC was calculated using a k factor based upon the fraction of randoms within the patient boundary, found by segmentation of the transmission sinograms, and assuming real-time randoms subtraction.

Keywords

image segmentation; medical image processing; positron emission tomography; 0.0077 to 0.0129 Ci; 112 to 320 lb; 2D whole-body PET imaging; 3D whole-body PET imaging; 74 to 125 min; GE Advance; NEC; noise-effective counts; positron emission tomography; real-time randoms subtraction; segmentation; subjective image quality measures; transmission sinograms; Data acquisition; Event detection; Image quality; Image reconstruction; National electric code; Noise measurement; Positron emission tomography; Q measurement; Scattering; Whole-body PET;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2002 IEEE

Print_ISBN

0-7803-7636-6

Type

conf

DOI

10.1109/NSSMIC.2002.1239581

Filename

1239581