The Journal of Japan Academy of Health Sciences
Online ISSN : 2433-3018
Print ISSN : 1880-0211
ISSN-L : 1880-0211
Optimization of novel respiratory-gated imaging technique in 4D-PET
Shota HosokawaKazuya KoyamaKazumasa Inoue
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2016 Volume 19 Issue 1 Pages 33-39

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Abstract
Although the novel respiratory-gated PET imaging is a commercially available technique, no details of its accuracy and its optimal parameter have been reported. Therefore, the accuracy and optimal acquisition window size were evaluated using a dynamic motion phantom which can simulate breathing movements of the human body. A PET scan was performed using a moving NEMA/IEC body phantom with six hot spheres( diameter: 10 ─ 37 mm) by changing the acquisition window size as an index of the respiration phase. In the reconstructed PET images obtained from different window sizes, the image quality was improved when the window size was narrow. Especially, the improvement of image quality for the 10 mm sphere was significantly higher than that of the other hot spheres. However, the statistical noise contained in the acquisition PET data was increased when the window size was narrow. The optimal acquisition window size was 25% of one breathing cycle.
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2016 Japan Academy of Health Sciences
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