DOSE REDUCTION IN CHEST CT EXAMINATION

被引：14

作者：

Sulieman, A. ^{[1
,2
]}

Tammam, N. ^{[2
]}

Alzimami, K. ^{[3
]}

Elnour, A. M. ^{[2
]}

Babikir, E. ^{[3
]}

Alfuraih, A. ^{[3
]}

机构：

[1] Prince Sattam bin Abdulaziz Univ, Coll Appl Med Sci, Radiol & Med Imaging Dept, Alkharj, Saudi Arabia

[2] Sudan Univ Sci & Technol, Coll Med Radiol Sci, Khartoum, Sudan

[3] King Saud Univ, Coll Appl Sci, Radiol Sci Dept, Riyadh, Saudi Arabia

来源：

RADIATION PROTECTION DOSIMETRY | 2015年 / 165卷 / 1-4期

关键词：

AUTOMATIC EXPOSURE CONTROL; COMPUTED-TOMOGRAPHY; RADIATION;

D O I：

10.1093/rpd/ncv123

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Computed tomography (CT) examinations involve relatively high doses to patients. The objectives of this study were to optimise the radiation dose for patient during CT chest scan and to estimate the lifetime cancer risk. A total of 50 patients were studied: control group (A) (38 patients) and optimisation group (B) (12 patients). The optimisation protocol was based on CT pitch increment and lowering tube current. The mean volume CT dose index (CTDIvol) was 21.17 mGy and dose length product (DLP) was 839.0 mGy cm for Group A, and CTDIvol was 8.3 mGy and DLP was 339.7 for Group B. The overall cancer risk was estimated to be 8.0 and 3.0 cancer incidence per million for Groups A and B, respectively. The patient dose optimisation during CT chest was investigated. Lowering tube current and pitch increment achieved a radiation dose reduction of up to 60 % without compromising the diagnostic findings.

引用

页码：185 / 189

页数：5

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