Optimisation of multislice computed tomography protocols in angio-CT examinations

被引：3
作者：
Strocchi S. [1 ]
Vite C. [1 ]
Callegari L. [2 ]
Conte L. [3 ]
机构：
[1] Fisica Sanitaria, Ospedale di Circolo e Fondazione Macchi, I-21100 Varese
[2] Radiologia, Ospedale di Circolo e Fondazione Macchi, I-21100 Varese
[3] Dipartimento di Scienze Cliniche e Biologiche, Università dell'Insubria
来源：
La radiologia medica | 2006年 / 111卷 / 2期
关键词：
Effective dose; Multislice computed tomography;
D O I：
10.1007/s11547-006-0024-5
中图分类号：
学科分类号：
摘要：
Purpose. The aim of this paper is to explain a general procedure for the optimisation of multislice computed tomography (MSCT) protocols. Materials and methods. Four angio-CT protocols with a GE LightSpeed Plus 4-slice CT scanner were considered. Effective doses were computed for a sample of patients. First the dose was optimised for arterial-phase scans on a standard patient and adapted to the weight of individual patients with a scaling factor. Results. The mean effective dose for an angio-CT examination ranged from 18.8 mSv to 28.8 mSv, depending on the protocol adopted. Following the optimisation procedure, we drew up a table indicating tube current values for each patient weight. Calculation of the effective dose before and after the optimisation procedure revealed a dose reduction of about 40%. Conclusions. Angio-CT examinations deliver high doses, but these doses can be reduced without affecting image quality.
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页码：238 / 244
页数：6
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