AUTOMATED QUALITY ASSURANCE AND PATIENT DOSIMETRY IN DIAGNOSTIC-RADIOLOGY

被引:5
作者
FAULKNER, K
CHAPPLE, CL
HEDLEY, P
KOTRE, CJ
HARRISON, RM
机构
[1] Regional Medical Physics Department, Newcastle General Hospital, Newcastle Upon Tyne, NE4 6BE, Westgate Road
来源
JOURNAL OF BIOMEDICAL ENGINEERING | 1990年 / 12卷 / 03期
关键词
patient dosimetry; quality assurance; Radiology;
D O I
10.1016/0141-5425(90)90046-P
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
It has been generally considered that improved methods of quality assurance would reduce the population dose from diagnostic radiology. This paper describes the development of a computerized method of automatically monitoring tube and generator parameters to perform on-line quality assurance, whilst undertaking various patient dosimetry measurements and calculations for each exposure. The method involves interfacing a microcomputer to a microprocessor controlled X-ray generator. Details of the various interfacing methods and modifications to the X-ray unit are given. The instrument enables quality assurance to be performed for every exposure by comparing tube and generator parameters against nominal settings. The software automatically warns the operator of any deviations from accepted limiting values. When a patient is examined, details of the examination and projection are entered into a database. The exposure area product and field size are monitored for each exposure. This data, together with information on tube potential and examination/projection is used to deduce patient entrance skin dose and energy imparted. Doses to individual organs are estimated using normalized organ dose data and a knowledge of tube potential and field size. © 1990.
引用
收藏
页码:228 / 232
页数:5
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