Computer-based collection of mammographic exposure data for quality assurance and dosimetry.
Computer-based collection of mammographic exposure data for quality assurance and dosimetry.
复制标题
基于计算机的乳房 X 线摄影曝光数据收集，用于质量保证和剂量测定。
DOI：
10.1118/1.1386425
复制
发表时间：
2001
期刊：
影响因子：
3.8
通讯作者：
Hunt,WC
中科院分区：
文献类型：
--
作者：
Rosenberg,RD;Kelsey,CA;Williamson,MR;Houston,JD;Hunt,WC
PURPOSET乳房X光检查的质量保证可能比MQSA规定的测试更多。在这篇文章中，我们描述了一种获取个人乳房X光照片技术参数的方法和新的测量方法。其中包括技师每次筛查检查所需的图像数量、技师的中位数压缩以及检查对普通患者的辐射剂量。方法/材料使用这种方法，我们描述了一种从乳房X光摄影曝光中收集技术数据的半自动方法。由乳房X光照相单元自动创建的数据被保存在计算机上以供以后分析。该方法被用于2738次连续筛查乳房X光检查和13621次曝光。结果按标准方法计算，平均每次照射剂量为2.62mGySD 1.2。每次双侧筛查平均剂量6.53mGySD 3.07，中位剂量6.11mGy1.13~34.23mGy.18%的曝光量使用了Rhodium过滤。乳房厚度平均为4.9 cm，中位数为4.9 cm。该机的ACR体模照射剂量在25kVP时为2.44mGy.26kVp时为1.97mGy.双侧乳房X光检查的平均曝光次数为4.9次，由技术专家从4.7次到5.2次不等。平均压缩压力在13~30磅(58~134N)之间变化。结论在25kVp时，每张乳房X线片的平均剂量略大于ACR体模的剂量。一项标准的双边检查需要近五次曝光，而这一点因技术专家而异。所使用的压缩方式也因技术专家而异。技术数据的半自动收集有助于维护有效的乳房X光检查质量保证程序。
PURPOSEThere is potentially more to quality assurance in mammography than the MQSA mandated tests. In this paper we describe a method of capturing individual mammogram technical parameters and the creation of new measures. These include the numbers of images required for each screening examination by technologist, median compression by technologist, and the radiation dose of the examination to the general population of patients.METHOD/MATERIALSWith this method we describe a semiautomated method of the collection of technical data from mammography exposures. The data that are automatically created by the mammography unit are saved on a computer for later analysis. The method was used on 2738 consecutive screening mammography examinations and 13 621 exposures from one machine. Data were obtained from November 1998 through December 1999.RESULTSUsing standard methods, the mean glandular dose (MGD) per exposure was 2.62 mGy (SD 1.2). The mean dose per bilateral screening examination was 6.53 mGy (SD 3.07), the median dose was 6.11 mGy, and the dose range was 1.13–34.23 mGy. Rhodium filtration was used for 18% of the exposures. The average and median breast thickness was 4.9 cm. The ACR phantom MGD for this machine was 2.44 mGy at 25 kVp, and 1.97 mGy at 26 kVp. The mean number of exposures for a bilateral mammogram was 4.9, and varied by a technologist from 4.7 to 5.2. The mean compression pressure varied by technologist from 13 to 30 lbs (58–134 N).CONCLUSIONSThe mean dose per mammogram is slightly greater than the ACR phantom dose at 25 kVp. Almost five exposures were necessary for a standard bilateral examination, and this varied by technologist. The compression used also varied by technologist. The semiautomated collection of technical data can aid in maintaining an effective mammography QA program.