الفهرس | Only 14 pages are availabe for public view |
Abstract Summary Breast lesions are a wide spectrum of heterogonous diseases, although benign lesions are the vast majority yet malignant lesions are of the most concern, in Egypt, breast cancer is the most common cancer among women, representing 37 % of all female cancers. We compared in our study between digital mammography and Tomosynthesis in the detection of breast lesions, which is very challenging especially in those females with dense breasts, and still the most challenging, is detection of breast cancer as early as possible. Digital mammography is a two-dimensional imaging modality and currently the golden role in detecting breast lesions, especially cancers at an early stage and is the only screening modality proved to reduce mortality and morbidity. However, it has several weakness and draw backs which affect this role such as tissue overlapping and unclear lesion margins, attributed to the clutter of signals from tissues above and below the lesions and because the signal detected is dependent upon the total attenuation of all the tissues above the location. On the other hand, Tomosynthesis is a three-dimensional imaging that reduces tissue overlap, its technology depends on acquisition of multiple projection exposures by digital detector from X-Ray tube which moves over a limited arc angle, these projection images are reconstructed using specific algorithms and presented as a series of images for the entire breast which are read at workstation. Image acquisition of both modalities is the same; two views are acquired CC and MLO, yet in DM tube is fixed and in Tomo tube moves over an angle. |