Radiation dose exposure of computed tomography coronary angiography: comparison of dual-source, 16-slice and 64-slice CT

被引：42

作者：

Rixe, J. ^{[1
]}

Conradi, G. ^{[1
]}

Rolf, A. ^{[1
]}

Schmermund, A. ^{[2
]}

Magedanz, A. ^{[2
]}

Erkapic, D. ^{[1
]}

Deetjen, A. ^{[3
]}

Hamm, C. W. ^{[1
]}

Dill, T. ^{[1
]}

机构：

[1] Kerckhoff Heart Ctr, Dept Cardiol, D-61231 Bad Nauheim, Germany

[2] Cardioangiol Zentrum Bethanien, Frankfurt, Germany

[3] Katharinen Hosp, Dept Cardiol, D-70174 Stuttgart, Germany

来源：

HEART | 2009年 / 95卷 / 16期

关键词：

TUBE CURRENT MODULATION; MULTIDETECTOR ROW CT; IMAGE QUALITY; PERFORMANCE EVALUATION; PHANTOM MEASUREMENTS; MULTISLICE CT; CARDIAC CT; PATIENT; REDUCTION; HEART;

D O I：

10.1136/hrt.2008.161018

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

Background: Dual-source CT (DSCT) promises a significant reduction of radiation dose exposure for coronary CT angiography (CTA). Large studies on radiation dose estimates are rare. Objective: To compare radiation dose estimates of DSCT with 16- and 64-slice multidetector CT (MDCT) for non-invasive coronary angiography. Patients and design: Retrospective data analysis was performed on 292 patients: 56 patients were examined with 16- slice MDCT, 38 patients with 64-slice MDCT and 202 patients using DSCT. The effective dose (ED) estimates were calculated for all patients from the dose length product and the conversion factor k (0.017 mSv/mGy/cm), as recommended by current guidelines. Results: The mean (SD) ED for patients examined by 16-slice MDCT was 9.8 (1.8) mSv, for 64-slice MDCT 8.6 (2.8) mSv and for DSCT 11.4 (7.2) mSv. With a protocol of 100 kV tube voltage and 110 ms ECG pulsing window the mean (SD) ED was 3.8 (1.7) mSv for DSCT scanning. When DSCT with a tube voltage of 100 kV was used, a significant inverse correlation between heart rate and radiation dose exposure was found. Conclusions: When standard protocols for coronary CTA with 16-, 64-slice MDCT and DSCT scanners are used, the radiation dose is still high. However, using optimised and individually adjusted protocols low estimated radiation doses can be achieved.

引用

页码：1337 / 1342

页数：6

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