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Proceedings Paper

Very low-dose adult whole-body tumor imaging with F-18 FDG PET/CT
Author(s): Andrzej Krol; Muhammad Naveed; Mary McGrath; Michele Lisi; Cathy Lavalley; David Feiglin
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Paper Abstract

The aim of this study was to evaluate if effective radiation dose due to PET component in adult whole-body tumor imaging with time-of-flight F-18 FDG PET/CT could be significantly reduced. We retrospectively analyzed data for 10 patients with the body mass index ranging from 25 to 50. We simulated F-18 FDG dose reduction to 25% of the ACR recommended dose via reconstruction of simulated shorter acquisition time per bed position scans from the acquired list data. F-18 FDG whole-body scans were reconstructed using time-of-flight OSEM algorithm and advanced system modeling. Two groups of images were obtained: group A with a standard dose of F-18 FDG and standard reconstruction parameters and group B with simulated 25% dose and modified reconstruction parameters, respectively. Three nuclear medicine physicians blinded to the simulated activity independently reviewed the images and compared diagnostic quality of images. Based on the input from the physicians, we selected optimal modified reconstruction parameters for group B. In so obtained images, all the lesions observed in the group A were visible in the group B. The tumor SUV values were different in the group A, as compared to group B, respectively. However, no significant differences were reported in the final interpretation of the images from A and B groups.

In conclusion, for a small number of patients, we have demonstrated that F-18 FDG dose reduction to 25% of the ACR recommended dose, accompanied by appropriate modification of the reconstruction parameters provided adequate diagnostic quality of PET images acquired on time-of-flight PET/CT.

Paper Details

Date Published: 19 March 2015
PDF: 6 pages
Proc. SPIE 9417, Medical Imaging 2015: Biomedical Applications in Molecular, Structural, and Functional Imaging, 941711 (19 March 2015); doi: 10.1117/12.2082420
Show Author Affiliations
Andrzej Krol, SUNY Upstate Medical Univ. (United States)
Muhammad Naveed, SUNY Upstate Medical Univ. (United States)
Mary McGrath, SUNY Upstate Medical Univ. (United States)
Michele Lisi, SUNY Upstate Medical Univ. (United States)
Cathy Lavalley, SUNY Upstate Medical Univ. (United States)
David Feiglin, SUNY Upstate Medical Univ. (United States)


Published in SPIE Proceedings Vol. 9417:
Medical Imaging 2015: Biomedical Applications in Molecular, Structural, and Functional Imaging
Barjor Gimi; Robert C. Molthen, Editor(s)

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