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논문 기본 정보

자료유형
학술저널
저자정보
Kang, Byung-Sam (Department of Radiological Technology, Shingu University) Son, Jin-Hyun (Department of Radiological Technology, Shingu University) Park, Hoon-Hee (Department of Radiological Technology, Shingu University) Dong, Kyung-Rae (Department of Radiological Technology, Gwangju Health College University)
저널정보
대한디지털의료영상학회 대한디지털의료영상학회논문지 대한디지털의료영상학회논문지 제13권 제3호
발행연도
2011.1
수록면
111 - 115 (5page)

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PET/CT(Positron Emission Tomography/Computed Tomography) is an examination combining morphological and functional information in one examination. The purpose of this study is to see the lowest CT dose for attenuation correction in the PET/CT maintaining good image quality when considering CT scan dose to the patients. We injected $^{18}F$-FDG and water into the cylinder shaped phantom, and obtained emission images for 3 mins and transmission images(140 kVp, 8 sec, 10~200 mA for transmission images), and reconstructed the images to PET/CT images with Iterative method. Data(Maximum, Minimum, Average, Standard Deviation) were obtained by drawing a circular ROI(Region Of Interest) on each sphere in each image set with Image J program. And then described SD according to the CT and PEC/CT images as graphes. Through the graphes, we got the relationships of mA and quality of images. SDs according to CT graph were 16.25 at 10 mA, 7.26 at 50 mA, 5.5 at 100 mA, 4.29 at 150 mA, and 3.83 at 200 mA, i.e. the higer mA, the better image quality was presented. SDs according to PET/CT graph were 1823.2 at 10 mA, 1825.1 at 50 mA, 1828.4 at 100 mA, 1813.8 at 150 mA, and 1811.3 at 200 mA. Calculated SDs at PET/CT images were maintained. This means images quality is maintained having nothing to do with mA of high and low.

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