Cavagnetto Francesca, Taccini Gianni, Rosasco Raffaella, Bampi Rossana, Calabrese Massimo, Tagliafico Alberto
Department of Medical Physics and Radiology, S.C.Fisica Medica e Sanitaria, A.O.U. IRCCS San Martino-IST, Largo R Benzi 10, Genova 16132, Italy.
Radiat Prot Dosimetry. 2013 Nov;157(1):53-61. doi: 10.1093/rpd/nct120. Epub 2013 Jun 3.
We analysed 300 patients X rayed with digital breast tomosynthesis (DBT), full-field digital mammography (FFDM) and 'COMBO' (single view both in FFDM and DBT in a single breast compression)-Hologic Selenia Dimension-W/Rh-Ag-Al: three different anode-filter combinations-automatic exposure control modalities. Examination parameter data collection (EPDC) and 'in vivo' dosimetry using metal oxide semiconductor field effect transistor (MOSFET) were utilised to determine and compare entrance skin air kerma (ESAK) and average glandular dose (AGD) from a radioprotection viewpoint in the DBT and COMBO modalities. MOSFET has been tested to be introduced in clinical routine. EPDC of DBT underlines increase in ESAK and AGD compared with FFDM (p < 0.05). The mean percentage increase was 34 % (+17 %) in ESAK and 46 % (+16 %) in AGD. In the COMBO modality, the mean percentage increase in ESAK was 162 % (+41 %) and in AGD was 202 % (+61 %). Differences between MOSFET measurement and calculated values were <8 % for breasts thicker than 30 mm; otherwise, the errors are >15 %. DBT increases ESAK and AGD, due to the 3D acquisition modality. MOSFET may be considered in DBT as a routine check.
我们分析了300例接受数字乳腺断层合成（DBT）、全视野数字化乳腺摄影（FFDM）以及“COMBO”（在单次乳房压迫下同时进行FFDM和DBT的单视图检查）——Hologic Selenia Dimension-W/Rh-Ag-Al：三种不同的阳极-滤过器组合——自动曝光控制模式检查的患者。利用检查参数数据收集（EPDC）以及使用金属氧化物半导体场效应晶体管（MOSFET）进行的“体内”剂量测定，从放射防护角度确定并比较DBT和COMBO模式下的入射皮肤空气比释动能（ESAK）和平均腺体剂量（AGD）。MOSFET已通过测试，可引入临床常规检查。DBT的EPDC显示，与FFDM相比，ESAK和AGD有所增加（p<0.05）。ESAK的平均百分比增加为34%（+17%），AGD为46%（+16%）。在COMBO模式下，ESAK的平均百分比增加为162%（+41%），AGD为202%（+61%）。对于厚度超过30mm的乳房，MOSFET测量值与计算值之间的差异<8%；否则，误差>15%。由于采用三维采集模式，DBT会增加ESAK和AGD。在DBT中，MOSFET可作为常规检查手段。
