• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Acta Radiologica >High-quality low-dose cardiovascular computed tomography (CCT) in pediatric patients using a 64-slice scanner
【24h】

High-quality low-dose cardiovascular computed tomography (CCT) in pediatric patients using a 64-slice scanner

机译：使用64切片扫描仪的儿科患者高质量的低剂量心血管计算断层扫描（CCT）

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Background Cardiovascular computed tomography (CCT) technology is rapidly advancing allowing to perform good quality examinations with a radiation dose as low as 1.2 mSv. However, latest generation scanners are not available in all centers. Purpose To estimate radiation dose and image quality in pediatric CCT using a standard 64-slice scanner. Material and Methods A total of 100 patients aged 6.9?±?5.4 years (mean?±?standard deviation) who underwent a 64-slice CCT scan using 80, 100, or 120 kVp, were retrospectively evaluated. Radiation effective dose was calculated on the basis of the dose length product. Two independent readers assessed the image quality through signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), and a qualitative score (3?=?very good, 2?=?good, 1?=?poor). Non-parametric tests were used. Results Fifty-five exams were not electrocardiographically (ECG) triggered, 20 had a prospective ECG triggering, and 25 had retrospective ECG triggering. The median effective dose was 1.3 mSv (interquartile range [IQR]?=?0.8–2.7 mSv). Median SNR was 30.6 (IQR?=?23.4–33.6) at 120 kVp, 29.4 (IQR?=?23.7–34.8) at 100 kVp, and 24.7 (IQR?=?19.4–34.3) at 80 kVp. Median CNR was 21.0 (IQR?=?14.8–24.4), 19.1 (IQR?=?15.6–23.9), and 25.3 (IQR?=?19.4–33.4), respectively. Image quality was very good, good, and poor in 56, 39, and 5 patients, respectively. No significant differences were found among voltage groups for SNR ( P ?=?0.486), CNR ( P ?=?0.336), and subjective image quality ( P ?=?0.296). The inter-observer reproducibility was almost perfect (κ?=?0.880). Conclusion High-quality pediatric CCT can be performed using a 64-slice scanner, with a radiation effective dose close to 2?mSv in about 50% of the cases.
机译：None

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号