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http://dx.doi.org/10.7742/jksr.2021.15.4.437

Image Quality and Dose Assessment According to Examination Mode during Head CT Examination  

Gang, Heon-Hyo (Department of Radiological Science, Collage of Health Sciences, Catholic University of Pusan)
Choi, Woo-Jeon (Department of Radiological Science, Collage of Health Sciences, Catholic University of Pusan)
Kim, Dong-Hyun (Department of Radiological Science, Collage of Health Sciences, Catholic University of Pusan)
Publication Information
Journal of the Korean Society of Radiology / v.15, no.4, 2021 , pp. 437-444 More about this Journal
Abstract
To evaluate the usefulness of Volume Axial Mode by comparing analyzing the exposure dose of the patients and the quality of each images from CT images obtained from high pitch mode using the local phantom or volume axial mode to determine the usefulness of he volume axial mode in diagnosing the head and cervical disease in adults. High Pitch Mode, Helical Mode, and Volume axial Mode as adult phantom were tested according to 70 kVp, 80 kVp, and 100 kVp tube voltages during an adult frontal CT scans. The equipment used was GE's Revolution (GE Healthcare, Wisconsin USA) model and iMED X-ray Phantom. The exposure dose of phantom was compared using the images obtained from each protocol, and the image quality was compared by calculating SNR and CNR by setting ROI on each image. When examined using Volume Axial Mode, the exposure dose of phantom was measured 17.12% lower than Helical Mode, 5.35% lower than High Pitch Mode, and both SNR and CNR were improved. Volume Axial Mode is a useful test that reduces investigation time without table movement using high speed rotary scanner, and in which exposure dose is reduced and image quality is improved by acquiring images in a short time of 0.28 seconds of phantom than using High Pitch Mode and Helical Mode. In addition, the fast testing time of Volume Axial Mode can be seen as the biggest advantage CT scans of emergency patients or patients with physical discomfort.
Keywords
Volume Axial Mode; SNR; CNR; DLP;
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Times Cited By KSCI : 1  (Citation Analysis)
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