Spampinato Maria Vittoria, Stalcup Seth, Matheus Maria Gisele, Byington Kathleen, Tyler Michael, Bickley Stetson, Tipnis Sameer
Department of Radiology and Radiological Science, Medical University of South Carolina, 96 Jonathan Lucas Street, MSC 323, Charleston, SC, USA.
ProDocs, LLC, 2508 Heather Lane, Bogart, GA, USA.
Radiat Prot Dosimetry. 2018 Dec 1;182(3):310-316. doi: 10.1093/rpd/ncy066.
Our goal was to define a pediatric head CT protocol able to provide images of diagnostic quality, using the least amount of radiation, in children <10 years of age, while using a filtered back projection reconstruction algorithm. Image quality of 119 pediatric head CTs was assessed using a 5-point scoring system. Exams with scores ≥2.5 were considered of sufficient diagnostic quality. The contrast-to-noise ratio (CNR) was also measured. For children <1 year and 1-9 years, all studies performed with CTDIvol ≥ 20.1 mGy (range: 9-46 mGy) and CTDIvol ≥ 27.5 mGy (range: 15-60 mGy) yielded images of diagnostic quality. All diagnostic studies had a minimum CNR of 1.4. These CTDIvol values represent a good balance between image quality and radiation burden. This information can be helpful in designing pediatric head CT protocols with further dose-reduction, namely, iterative reconstruction algorithms and automated exposure control.
我们的目标是定义一种儿科头部CT扫描方案，该方案能够在使用滤波反投影重建算法的情况下，以最少的辐射量为10岁以下儿童提供具有诊断质量的图像。使用5分制评分系统对119例儿科头部CT扫描的图像质量进行评估。得分≥2.5的检查被认为具有足够的诊断质量。同时还测量了对比噪声比（CNR）。对于1岁以下和1至9岁的儿童，所有CTDIvol≥20.1 mGy（范围：9 - 46 mGy）和CTDIvol≥27.5 mGy（范围：15 - 60 mGy）的扫描均产生了具有诊断质量的图像。所有诊断性扫描的最小CNR为1.4。这些CTDIvol值在图像质量和辐射负担之间实现了良好的平衡。这些信息有助于设计进一步降低剂量的儿科头部CT扫描方案，即迭代重建算法和自动曝光控制。
