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128 절편 이중선원 전산화단층촬영 하지동맥조영술의 영상 품질 및 방사선량: 고 피치와 저 피치의 비교
Image Quality and Radiation Dose of Lower Extremity CT Angiography in 128 Slice Dual-Source CT: Comparison of High Pitch and Low Pitch

대한영상의학회지 2014년 71권 3호 p.120 ~ p.127

박중환(Park Jung-Hwan) - Pusan National University School of Medicine Pusan National University Yangsan Hospital Department of Radiology
추기석(Choo Ki-Seok) - Pusan National University School of Medicine Pusan National University Yangsan Hospital Department of Radiology
전웅배(Jeon Ung-Bae) - Pusan National University School of Medicine Pusan National University Yangsan Hospital Department of Radiology
백승국(Baik Seung-Kug) - Pusan National University School of Medicine Pusan National University Yangsan Hospital Department of Radiology
김용우(Kim Yong-Woo) - Pusan National University School of Medicine Pusan National University Yangsan Hospital Department of Radiology
김태언(Kim Tae-Un) - Pusan National University School of Medicine Pusan National University Yangsan Hospital Department of Radiology
김창원(Kim Chang-Won) - Pusan National University School of Medicine Pusan National University Hospital Department of Radiology
정동욱(Jeong Dong-Wook) - Pusan National University School of Medicine Pusan National University Yangsan Hospital Department of Family Medicine
임수진(Lim Soo-Jin) - Gim Hae Jungang Hospital Department of Cardiology

Abstract

Purpose: The objective of this study is to compare image quality and radiation dose of high pitch (3) CT angiography (CTA) with 128-slice dual-source CT in lower extremity arteries with that of low pitch (0.6) CTA.

Materials and Methods: A total of 136 patients were divided into two groups; high pitch (3) group included 67 patients and low pitch (0.6) group included 69 patients. For quantitative analysis, we calculated the mean arterial attenuation, mean coefficient variation of arterial attenuations, mean contrast-to-noise ratio, mean figure of merit (FOM), and mean standard deviation of CT density of muscle. In addition, visual scores were used for qualitative evaluation, and radiation doses were reported in the two groups.

Results: The mean dose-length product was decreased by 31% at high pitch (409.49 ± 37.71 mGy·cm vs. 592.98 ± 59.69 mGy·cm), and the mean volume CT dose index was also significantly decreased at high pitch (2.91 ± 0.14 mGy vs. 4.70 ± 0.30 mGy). However, other quantitative analysis showed no significant intergroup differences, except in mean FOM. Visual scores showed no significant intergroup difference.

Conclusion: Despite changing the pitch from 0.6 to 3, the image quality of CTA was not degraded and radiation dose was reduced by 31%.

키워드

Multidetector Computed Tomography, Radiation, Angiography, Lower Extremity

KMID : 1103720140710030120

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주제코드

주제명(Target field)

연구대상(Population)

연구참여(Sample size)

대상성별(Gender)

질병특성(Condition Category)

연구환경(Setting)

연구설계(Study Design)

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중재명칭(Intervention Name)

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유효성결과(Recomendation)

연구비지원(Fund Source)

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DOI

KCD코드

ICD 03

건강보험코드

128 절편 이중선원 전산화단층촬영 하지동맥조영술의 영상 품질 및 방사선량: 고 피치와 저 피치의 비교 Image Quality and Radiation Dose of Lower Extremity CT Angiography in 128 Slice Dual-Source CT: Comparison of High Pitch and Low Pitch

Abstract

키워드

128 절편 이중선원 전산화단층촬영 하지동맥조영술의 영상 품질 및 방사선량: 고 피치와 저 피치의 비교
Image Quality and Radiation Dose of Lower Extremity CT Angiography in 128 Slice Dual-Source CT: Comparison of High Pitch and Low Pitch