Ayyala Rama S, Chorlton Maryann, Behrman Richard H, Kornguth Phyllis J, Slanetz Priscilla J
Department of Radiology, Boston University School of Medicine, Boston, Massachusetts 02215, USA.
Radiographics. 2008 Nov-Dec;28(7):1999-2008. doi: 10.1148/rg.287085053.
The recent introduction of digital mammography represents a significant technologic advance in breast imaging. However, many radiologists and technologists are unfamiliar with artifacts that are commonly seen with this modality, and recognizing these artifacts is critical for optimizing image quality. Commonly encountered artifacts include patient-related artifacts (motion artifact, antiperspirant artifact, thin breast artifact), hardware-related artifacts (field inhomogeneity, detector-associated artifacts, collimator misalignment, underexposure, grid lines, grid misplacement, vibration artifact), and software processing artifacts ("breast-within-a-breast" artifact, vertical processing bars, loss of edge, high-density artifacts). Although some of these artifacts are similar to those seen with screen-film mammography, many are unique to digital mammography--specifically, those due to software processing errors or digital detector deficiencies. In addition, digital mammographic artifacts depend on detector technology (direct vs indirect) and therefore can be vendor specific. It is important that the technologist, radiologist, and physicist become familiar with the spectrum of digital mammographic artifacts and pay careful attention to digital quality control procedures to ensure optimal image quality.
数字乳腺摄影术的近期引入代表了乳腺成像技术的重大进步。然而，许多放射科医生和技术人员并不熟悉这种成像方式中常见的伪影，识别这些伪影对于优化图像质量至关重要。常见的伪影包括与患者相关的伪影（运动伪影、止汗剂伪影、乳腺过薄伪影）、与硬件相关的伪影（场不均匀性、探测器相关伪影、准直器未对准、曝光不足、网格线、网格错位、振动伪影）以及软件处理伪影（“乳腺内乳腺”伪影、垂直处理条、边缘丢失、高密度伪影）。尽管其中一些伪影与屏-片乳腺摄影中所见的类似，但许多是数字乳腺摄影所特有的——特别是那些由软件处理错误或数字探测器缺陷导致的伪影。此外，数字乳腺摄影伪影取决于探测器技术（直接型与间接型），因此可能因供应商而异。技术人员、放射科医生和物理学家熟悉数字乳腺摄影伪影的范围并密切关注数字质量控制程序以确保最佳图像质量非常重要。
