Tsalafoutas Ioannis A, Epistatou Angeliki C, Delibasis Konstantinos K
Occupational Health and Safety Department, Radiation Safety Section, Hamad Medical Corporation, Doha P.O. Box 3050, Qatar.
Department of Computer Science and Biomedical Informatics, University of Thessaly, 35131 Lamia, Greece.
J Imaging. 2022 Aug 21;8(8):223. doi: 10.3390/jimaging8080223.
To evaluate the image quality (IQ) of synthesized two-dimensional (s2D) and tomographic layer (TL) mammographic images in comparison to the 2D digital mammographic images produced with a new digital breast tomosynthesis (DBT) system. The CDMAM test object was used for IQ evaluation of actual 2D images, s2D and TL images, acquired using all available acquisition modes. Evaluation was performed automatically using the commercial software that accompanied CDMAM. The IQ scores of the TLs with the in-focus CDMAM were comparable, although usually inferior to those of 2D images acquired with the same acquisition mode, and better than the respective s2D images. The IQ results of TLs satisfied the EUREF limits applicable to 2D images, whereas for s2D images this was not the case. The use of high-dose mode (H-mode), instead of normal-dose mode (N-mode), increased the image quality of both TL and s2D images, especially when the standard mode (ST) was used. Although the high-resolution (HR) mode produced TL images of similar or better image quality compared to ST mode, HR s2D images were clearly inferior to ST s2D images. s2D images present inferior image quality compared to 2D and TL images. The HR mode produces TL images and s2D images with half the pixel size and requires a 25% increase in average glandular dose (AGD). Despite that, IQ evaluation results with CDMAM are in favor of HR resolution mode only for TL images and mainly for smaller-sized details.
为了评估合成二维（s2D）和断层摄影层（TL）乳腺钼靶图像的图像质量（IQ），并与使用新型数字乳腺断层合成（DBT）系统生成的二维数字乳腺钼靶图像进行比较。使用CDMAM测试物体对使用所有可用采集模式获取的实际二维图像、s2D图像和TL图像进行IQ评估。使用随CDMAM附带的商业软件自动进行评估。聚焦的CDMAM的TL的IQ分数具有可比性，尽管通常低于使用相同采集模式获取的二维图像的IQ分数，且优于相应的s2D图像。TL的IQ结果满足适用于二维图像的欧盟参考限值，而s2D图像则不然。使用高剂量模式（H模式）而非正常剂量模式（N模式）可提高TL和s2D图像的图像质量，尤其是在使用标准模式（ST）时。尽管高分辨率（HR）模式产生的TL图像的图像质量与ST模式相似或更好，但HR s2D图像明显不如ST s2D图像。与二维和TL图像相比，s2D图像的图像质量较差。HR模式产生的TL图像和s2D图像的像素大小减半，且平均腺体剂量（AGD）需要增加25%。尽管如此，使用CDMAM进行的IQ评估结果仅对TL图像且主要针对较小尺寸的细节有利于HR分辨率模式。
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