Dosimetric changes with computed tomography automatic tube-current modulation techniques

被引：10
作者：
Spampinato S. [1 ,2 ,4 ]
Gueli A.M. [1 ,2 ]
Milone P. [2 ,3 ]
Raffaele L.A. [1 ,2 ,3 ]
机构：
[1] PH3DRA Laboratories (PHysics for Dating Diagnostic Dosimetry Research and Applications), Dipartimento di Fisica e Astronomia, Università di Catania and INFN-Catania, Via Santa Sofia 64, Catania
[2] Scuola di Specializzazione in Fisica Medica, Dipartimento di Scienze mediche chirurgiche e tecnologie avanzate “G. F. Ingrassia”, Scuola Facoltà di Medicina, Via Santa Sofia 78, Catania
[3] Unità Operativa Complessa di Radiodiagnostica e Radioterapia, Azienda Ospedaliero-Universitaria Policlinico di Catania, P. O. Gaspare Rodolico, Via Santa Sofia 78, Catania
[4] Department of Oncology, Aarhus University Hospital, Nørrebrogade 44, Aarhus
来源：
Radiological Physics and Technology | 2018年 / 11卷 / 2期
关键词：
Anthropomorphic phantom; CTDI; DLP; Noise index; Radiochromic films;
D O I：
10.1007/s12194-018-0454-5
中图分类号：
学科分类号：
摘要：
The study is aimed at a verification of dose changes for a computed tomography automatic tube-current modulation (ATCM) technique. For this purpose, anthropomorphic phantom and Gafchromic® XR-QA2 films were used. Radiochromic films were cut according to the shape of two thorax regions. The ATCM algorithm is based on noise index (NI) and three exam protocols with different NI were chosen, of which one was a reference. Results were compared with dose values displayed by the console and with Poisson statistics. The information obtained with radiochromic films has been normalized with respect to the NI reference value to compare dose percentage variations. Results showed that, on average, the information reported by the CT console and calculated values coincide with measurements. The study allowed verification of the dose information reported by the CT console for an ATCM technique. Although this evaluation represents an estimate, the method can be a starting point for further studies. © 2018, Japanese Society of Radiological Technology and Japan Society of Medical Physics.
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页码：184 / 191
页数：7
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