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- 저자 : 정재현(Je Hyeon Jeong) (검색결과 2 건)
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MDCT를 이용한 Head Angiography검사 시 Contrast Volume 감소에 관한 연구
김정훈(Jeong hoon Kim),정재현(Je Hyeon Jeong),김기홍(Ki Hong Kim) 대한CT영상기술학회 2008 대한CT영상기술학회지 Vol.10 No.1
Purpose This study is to evaluate an effect on quality of angiographic image, when the contrast volume is reduced in head angiography by MDCT Materials and methods Total forty patients have been examined a head angiography by MDCT. Twenty patients (A group) of forty patients have been examined with contrast madia with 100ml, the other twenty patients (B group) have been examined with contrast madia with 60ml and normal saline with 40 ml. Speed of injection by auto injector was 4-5cc per Second. Dual source CT(Definition, Siemens, Erlangen, Germany) and dual auto injector (Optivantage, TYCO) were used for this study. The obtained images were reconstructed three dimension, and then that was visually evaluated by three radiological technologists. A value of CT number (Hounsfield Unit) was measured on three portion including internal carotid artery (ICA), M1 of middle cerebral aitery (MCA), Basal Artery (BA). Results In the visual evaluation, the average score of A group was 2.43±0.45, and B group was 2.40±0.44. In the value of CT number, ICA, M1 of MCA, and BA A group were 441.99±65.26, 242.84±41.72, and 331.42±58.07, respectively. B group were 413.78±51.03, 229.16±32.33, and 305.13±67.26, respectively. Conclusion When testing used quantity of the contrast media that is reduced 40%, we could know that It don’t effect the image quality, and we basically think of dangerous element about increasing a side effect of the contrast media with developing CT test. If we can reduce the amount of the using without decreasing the image quality, the study will develop more safe ai1d reliably.
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Low dose CT Virtual Colonography의 유용성 평가
김정훈(Jeong hoon Kim),정재현(Je Hyeon Jeong),김기홍(Ki Hong Kim) 대한CT영상기술학회 2008 대한CT영상기술학회지 Vol.10 No.1
Purpose We compared our study to evaluate an usefulness of a low dose CT virtual colonography. Materials and methods During February 2006, 20 patients with colon cancer were taken CT virtual colonography. A 16 MDCT (Somatom Sensation 16, Siemens, Germany) was used for this study. The variable mA according to the dose modulation program with care dose 4D was used in supine position, and the constant mA with lower dose than that was used in prone position. 5 experts including 1 radiologist, 2 radiological technologist charged in 3D processing, and 2 radiological technologist charged in CT evaluated the dose and images. Results The value of CTDIv in using care dose 4D was a mean 9.00mGy, and constant mA was a mean 3.90mGy. There was not different between the images including shape, definition, and flexibility of variable mA and constant mA (p< 0.05). Conlclusion Our data suggest that the low dose CT virtual colonography is useful in the aspect of dose and image.
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