OPTIMISATION OF SWALLOWING CT EXAMINATION: DOSE REDUCTION AND IMAGE QUALITY

被引：6

作者：

Kobayashi, Masanao ^{[1
]}

Asada, Yasuki ^{[1
]}

Haba, Tomonobu ^{[2
]}

Matsunaga, Yuta ^{[3
]}

Matsubara, Kosuke ^{[4
]}

Minami, Kazuyuki ^{[1
]}

机构：

[1] Fujita Hlth Univ, Grad Sch Hlth Sci, 1-98 Dengakugakubo,Kutsukake Cho, Toyoake, Aichi, Japan

[2] Fujita Hlth Univ Hosp, Dept Radiol, 1-98 Dengakugakubo,Kutsukake Cho, Toyoake, Aichi, Japan

[3] Nagoya Kyoritsu Hosp, Dept Imaging, Nakagawa Ku, 1-172 Hokke, Nagoya, Aichi, Japan

[4] Kanazawa Univ, Fac Hlth Sci, Inst Med Pharmaceut & Hlth Sci, Dept Ouantum Med Technol, 5-11-80 Kodatsuno, Kanazawa, Ishikawa, Japan

来源：

RADIATION PROTECTION DOSIMETRY | 2019年 / 185卷 / 04期

关键词：

KINEMATIC ANALYSIS; LARYNGEAL CLOSURE;

D O I：

10.1093/rpd/ncz029

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This study sought to optimise the swallowing computed tomography (SCT) scan protocol for use with the new wide-area detector-row CT (ADCT) scanner and to estimate patient dose in terms of the organ-absorbed dose and the effective dose. The conventional ADCT (ADCT(ViSION)) and the new ADCT (ADCT(GENESIS)) scanner were compared using: (1) the organ-absorbed dose and the effective dose, with a phantom study, (2) the detailed organ-absorbed doses of the neck region, using a Monte Carlo simulation and (3) a relative visual quality analysis. The effective energy differed significantly between the ADCT(ViSION) (50 keV) and the ADCT(GENESIS) (57 keV). The effective doses were 2.9 and 1.9 mSv, respectively. Compared with the ADCT(ViSION), the absorbed dose was reduced by 34% with the ADCT(GENESIS). With the ADCT(GENESIS), the tube current could be reduced from 40 to 30 mA. With the optimised scan protocol, a further 25% dose reduction can be achieved.

引用

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页码：421 / 431

页数：11

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