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Determination of the optimal range for virtual monoenergetic images in dual-energy CT based on physical quality parameters
Medical Physics ( IF 3.8 ) Pub Date : 2021-07-21 , DOI: 10.1002/mp.15120
Enric Fernandez-Velilla Cepria 1, 2 , Miguel Ángel González-Ballester 3, 4 , Jaume Quera Jordana 1, 2, 5 , Oscar Pera 1, 2 , Xavier Sanz Latiesas 1, 2, 5 , Palmira Foro Arnalot 1, 2, 5 , Ismael Membrive Conejo 1, 2 , Nuria Rodriguez de Dios 1, 2, 5 , Anna Reig Castillejo 1, 2 , Manuel Algara Lopez 1, 2, 6
Affiliation  

Virtual monoenergetic images (VMI) obtained from Dual-Energy Computed Tomography (DECT) with iodinated contrast are used in radiotherapy of the Head and Neck to improve the delineation of target volumes and organs at-risk (OAR). The energies used to vary from 40 to 70 keV, but noise at low keV and the use of Single Energy CT (SECT) at low kVp settings may shrink this interval. There is no guide about how to find out the optimal range where VMI has a significant improvement related to SECT images. Our study proposes a procedure to determine this optimal range, based on common image quality parameters, and establishes this range in a Siemens Somatom Confidence and a Head and Neck protocol.

中文翻译:

基于物理质量参数的双能CT虚拟单能图像最佳范围的确定

从具有碘对比剂的双能量计算机断层扫描 (DECT) 获得的虚拟单能图像 (VMI) 用于头颈部放射治疗,以改善靶区和危险器官 (OAR) 的描绘。过去的能量从 40 到 70 keV 不等,但低 keV 下的噪声和在低 kV p设置下使用单能量 CT (SECT)可能会缩小此间隔。没有关于如何找出 VMI 与 SECT 图像相关的显着改进的最佳范围的指南。我们的研究提出了一种基于常见图像质量参数确定该最佳范围的程序,并在 Siemens Somatom Confidence 和 Head and Neck 协议中建立了该范围。
更新日期:2021-09-21
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