Ghasemi Shayan Ramin, Oladghaffari Maryam, Sajjadian Fakhrosadat, Fazel Ghaziyani Mona
Radiology Department, Tabriz University of Medical Sciences, Tabriz 51368, Iran.
Radiol Res Pract. 2020 Apr 20;2020:1403957. doi: 10.1155/2020/1403957. eCollection 2020.
CT and its comprehensive usage have become one of the most indispensable components in medical field especially in the diagnosis of several diseases. SECT and DECT have developed CT diagnostic potentials in several means. In this review article we have discussed the basic principles of single-energy and dual-energy computed tomography and their important physical differences which can cause better diagnostic evaluation. Moreover, different organs diagnostic evaluations through single-energy and dual-energy computed tomography have been discussed. Conventional or single-energy CT (SECT) uses a single polychromatic X-ray beam (ranging from 70 to 140 kVp with a standard of 120 kVp) emitted from a single source and received by a single detector. The concept of dual-energy computed tomography (DECT) is almost as old as the CT technology itself; DECT initially required substantially higher radiation doses (nearly two times higher than those employed in single-energy CT) and presented problems associated with spatial misregistration of the two different kV image datasets between the two separate acquisitions. The basic principles of single-energy and dual-energy computed tomography and their important physical differences can cause better diagnostic evaluation. Moreover, different organs diagnostic evaluations through single-energy and dual-energy computed tomography have been discussed. According to diverse data and statistics it is controversial to definitely indicate the accurate comparison of image quality and dose amount.
CT及其综合应用已成为医学领域尤其是多种疾病诊断中最不可或缺的组成部分之一。单能CT（SECT）和双能CT（DECT）在多个方面拓展了CT的诊断潜力。在这篇综述文章中，我们讨论了单能和双能计算机断层扫描的基本原理及其重要的物理差异，这些差异有助于实现更好的诊断评估。此外，还探讨了通过单能和双能计算机断层扫描对不同器官的诊断评估。传统的或单能CT（SECT）使用从单个源发射并由单个探测器接收的单一多色X射线束（范围为70至140千伏峰值，标准为120千伏峰值）。双能计算机断层扫描（DECT）的概念几乎与CT技术本身一样古老；DECT最初需要更高的辐射剂量（几乎比单能CT所用剂量高两倍），并且存在两个不同千伏图像数据集在两次单独采集之间空间配准错误的问题。单能和双能计算机断层扫描的基本原理及其重要的物理差异有助于实现更好的诊断评估。此外，还探讨了通过单能和双能计算机断层扫描对不同器官的诊断评估。根据各种数据和统计，明确指出图像质量和剂量的准确比较存在争议。
