| Yao Liping,Zhang Li,Ding Ming,Yu Lingwei,Sun Kun,Li Huimin.Assessment of coronary artery by prospective ECG-triggered 256 multi-slice CT on children with congenital heart diseases[J].Chinese Journal of Radiological Medicine and Protection,2016,36(7):534-539 |
| Assessment of coronary artery by prospective ECG-triggered 256 multi-slice CT on children with congenital heart diseases |
| Received:November 11, 2015 |
| DOI：10.3760/cma.j.issn.0254-5098.2016.07.012 |
| KeyWords:Coronary artery Congenital heart disease Prospective ECG-triggered 256-MSCT angiography Radiation dosage |
| FundProject:上海市科委基础研究重点项目（12JC1406600） |
| Author Name | Affiliation | E-mail | | Yao Liping | Department of Cardiothoracic Surgery, Department of Radiology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, China | | | Zhang Li | Department of Cardiothoracic Surgery, Department of Radiology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, China | | | Ding Ming | Department of Cardiothoracic Surgery, Department of Radiology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, China | | | Yu Lingwei | Department of Cardiothoracic Surgery, Department of Radiology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, China | | | Sun Kun | Department of Cardiothoracic Surgery, Department of Radiology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, China | | | Li Huimin | Department of Cardiothoracic Surgery, Department of Radiology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, China | lihuiminphd@163.com |
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| Abstract:: |
| Objective To investigate the image quality and radiation dosage of the prospective ECG-triggered 256 multi-slice computer tomography (MSCT) angiography in accessing coronary artery (CA) on children. Methods Coronary arteries of ninety-three children were evaluated using prospective ECG-triggered 256-MSCT with the same system setting. Seventy-four patients had the heart rate records and a four-point scoring system was applied to study the capability of MSCT in detecting CA. The signal, noise and contrast-to-noise ratio (CNR) were analyzed to investigate the association of image quality with age (n=74). Then volumetric CT dose index (CTDIvol), dose-length product (DLP) and effective dose (E) were utilized to study the association of radiation dosage with age (n=93). Results On 74 patients with heart records, the detection rate for original, proximal, middle, distal and all 11 segments of CA was 100%, 97%, 92%, 78% and 91%, respectively. No influence of age was found on their detection (all P > 0.05). E of group A,B,C and D were 1.8, 1.3, 0.8 and 0.7 mSv, respectively. A strong negative correlation was found between E and age (r=-0.803, P < 0.01). Higher DLP was found on elder patients, though no correlation was found between ages vs. DLP(r=0.124, P > 0.05). No correlation was found between noise vs. age (r=0.041, P > 0.05). Significantly larger signals,CNR and E(t=3.386, 2.073, 3.825, P < 0.05)were found on younger patients (age < 3 years). Conclusions Prospective ECG-triggered 256-MSCT has considerable performance for the evaluation of coronary arteries on children. However, children under the age of 3 are not recommended for this examinary, but for examination on children ≥ 8-year old, the tube current could be further needed. |
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