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KMID : 1143620160200010020
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Korean Journal of Nuclear Medicine Technology
2016 Volume.20 No. 1 p.20 ~ p.23
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Evaluation about a Usefulness of ECG-Gated Scan on 13N-ammonia PET
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Kim Jae-Il
Lee Hong-Jae
Kim Jin-Eui
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Abstract
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Purpose : Because of heart movement, PET image of heart is very blur. So, PET scan gated with ECG is necessary to
improve a spatial resolution of heart PET image. In this study, we will evaluate a image quality of both gated 13N-ammonia PET scan and non-gated one.
Materials and Methods : Before s tart a heart PET, we attached a ECG electrode on patients (n = 5, aged = 54 ± 17). And we started a list mode PET scan that used by a mCT40 PET/CT (siemens, germany) during 10 minute, injected 13N-ammonia (378 ± 50 MBq) to a patients at same time. By using this list mode data, we reconstructed both gated PET image and non-gated PET image. Then we analysed a profiles of those images, performed a blind test, and subtracted
a gated image on non-gated image.
Results : FWHM of a gated image is improve d about 23% and there is a differency count distribution at a subtracted
image from non-gated image to a gated image. But in case of blind test, everybody select the gated image as a better quality among each images.
Conclusion : As a result, we can find that image quality will improve by using gated PET scan. In additional, we can calculate a EF valve, apply QGS, QPS of PET. Therefore, the gated PET scan help improving an accuracy, applying a
more information for a diagnosis.
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KEYWORD
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gated scan, ECG, 13 N-ammonia PET-CT
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