Low Radiation Dose and High Image Quality of 320-Row Coronary Computed Tomography Angiography Using a Small Dose of Contrast Medium and Refined Scan Timing Prediction
| Autor: | Hiroshi Hamasaki, Tsukasa Kojima, Yoshiki Asayama, Toyoyuki Kato, Takeshi Kamitani, Masatoshi Kondo, Takashi Shirasaka, Yuzo Yamasaki, Michinobu Nagao |
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| Rok vydání: | 2020 |
| Předmět: |
Male
Computed Tomography Angiography Image quality Contrast Media Coronary Artery Disease Radiation Dosage 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Ct number medicine.artery Hounsfield scale Ascending aorta medicine Humans Low dose ct Drug Dosage Calculations Radiology Nuclear Medicine and imaging Aged Retrospective Studies medicine.diagnostic_test business.industry Coronary computed tomography angiography Middle Aged Radiographic Image Enhancement Contrast medium Angiography Feasibility Studies Female Nuclear medicine business 030217 neurology & neurosurgery |
| Zdroj: | Journal of Computer Assisted Tomography. 44:7-12 |
| ISSN: | 0363-8715 |
| DOI: | 10.1097/rct.0000000000000951 |
| Popis: | OBJECTIVE The aim of the study was to investigate the feasibility of coronary computed tomography (CT) angiography with a low kilovoltage peak scan and a refined scan timing prediction using a small contrast medium (CM) dose. METHODS In protocol A, 120-kVp scanning and a standard CM dose were used. The scan timing was fixed. In protocol B, 80 kVp and a 60% CM dose were used. The scan timing was determined according to the interval from the CM arrival to the peak time in the ascending aorta. We measured the CT number and recorded the radiation dose. RESULTS Higher CT numbers were observed in the left circumflex (proximal, P = 0.0235; middle, P = 0.0007; distal, P < 0.0001) in protocol B compared with protocol A. The radiation dose in protocol B was significantly lower than in protocol A (2.2 ± 0.9 vs 4.3 ± 1.7 mSv). CONCLUSIONS Low-contrast, low-radiation dose, high-image quality coronary CT angiography can be performed with low kilovoltage peak scanning and a refined scan timing prediction. |
| Databáze: | OpenAIRE |
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