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KMID : 0357520140370040307
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Journal of Radiological Science and Technology
2014 Volume.37 No. 4 p.307 ~ p.313
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The Clinical Usefulness Evaluation of Normal Saline Injection in Coronary Artery Computed Tomography Angiography(Coronary CTA)
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Jung Kang-Kyo
Lee Mi-Hwa
Cho Pyong-Kon
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Abstract
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The purpose of this study is that in coronary artery angiography computed tomography (coronary CTA), to gain high quality of image and to use low dose radiation by administrating normal saline and converting the mode of scanning heart rate (HR) characteristics before infusing contrast media. All patients data (total specimens: 200, male: 108, female: 92) were measured by using appropriate mode of scanning the heart rate (HR) after injection of saline. in addition we measured radiation dose (CTDIvol, effective dose) in all examinations. CT number and noise, and blurring of coronary artery (proximal RCA, middle RCA, proximal LCA) were measured and compared. The result of this study after injection of saline, mean heart rate was decreased about 4.8±0.3 bpm (beats per minute). 33 patients (13%) got converting scan mode due to reducing heart rate (HR). In prospective gating mode, radiation dose were measured less 6.0±1.0 mSv (54.1%) than retrospective gating mode. Also showed a significant difference in heart rate decrease in image evaluation.
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KEYWORD
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Coronary CTA, Heart rate, Normal saline, Contrast media, Scan mode
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