Proton Radiographs Using Position-Sensitive Silicon Detectors and High-Resolution Scintillators

被引：3

作者：

Briz, J. A. ^{[1
]}

Nerio, A. N. ^{[1
]}

Ballesteros, C. ^{[1
]}

Borge, M. J. G. ^{[1
]}

Martinez, P. ^{[1
]}

Perea, A. ^{[1
]}

Tavora, V. G. ^{[1
]}

Tengblad, O. ^{[1
]}

Ciemala, M. ^{[2
]}

Maj, A. ^{[2
]}

Olko, P. ^{[2
]}

Parol, W. ^{[2
]}

Pedracka, A. ^{[2
]}

Sowicki, B. ^{[2
]}

Zieblinski, M. ^{[2
]}

Nacher, E. ^{[3
]}

机构：

[1] Inst Estruct Mat CSIC, Madrid 28006, Spain

[2] Inst Fizyki Jadrowej PAN, PL-31342 Krakow, Poland

[3] Univ Valencia, Inst Fis Corpuscular, CSIC, Valencia 46980, Spain

来源：

IEEE TRANSACTIONS ON NUCLEAR SCIENCE | 2022年 / 69卷 / 04期

关键词：

LaBr3; particle tracking; proton computed tomography (pCT); proton radiograph; proton therapy; scintillation detectors; silicon detectors; HIGH-ENERGY GAMMA; SYSTEM; PHOSWICH;

D O I：

10.1109/TNS.2022.3142618

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Proton therapy is a cancer treatment technique currently in growth since it offers advantages with respect to conventional X-ray and gamma-ray radiotherapy. In particular, better control of the dose deposition allowing to reach higher conformity in the treatments causing less secondary effects. However, in order to take full advantage of its potential, improvements in treatment planning and dose verification are required. A new prototype of proton computed tomography scanner is proposed to design more accurate and precise treatment plans for proton therapy. Our prototype is formed by double-sided silicon strip detectors and scintillators of LaBr3(Ce) with high energy resolution and fast response. Here, the results obtained from an experiment performed using a 100-MeV proton beam are presented. Proton radiographs of polymethyl methacrylate (PMMA) samples of 50-mm thickness with spatial patterns in aluminum were taken. Their properties were studied, including reproduction of the dimensions, spatial resolution, and sensitivity to different materials. Structures of up to 2 mm are well resolved and the sensitivity of the system was enough to distinguish the thicknesses of 10 mm of aluminum or PMMA. The spatial resolution of the images was 0.3 line pairs per mm (MTF-10%). This constitutes the first step to validate the device as a proton radiography scanner.

引用

页码：696 / 702

页数：7

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