A study on phase sensitive imaging for breast tomosynthesis applications (original) (raw)
Purpose: To examine the potential advantages of phase sensitive imaging in breast tomosynthesis (BT) for more accurate and early detection of breast cancer. Material and Methods: An in-house phantom with a 5 cm radius and a 3 cm thickness of paraffin wax with embedded spheres, fibers and clusters of CaCO 3 , simulating breast malignancies, was used. BT images were acquired with an in-line phase contrast mode using synchrotron radiation at 20 keV. Fifteen projections were obtained with an object to detector distance of 150 cm, acquisition arc of 15 0 and mean glandular dose (MGD) of 2.3 mGy. Attenuation based BT images of the same phantom were acquired with the use of a commercial imaging system. In this case, 15 projections were obtained at 28 kVp, 35 mAs with MGD 1.4 mGy, within an acquisition arc of 15 0 . Results: In both experiments filtered back projection reconstruction algorithms were utilised, resulting in BT planes of 1 mm distance. The reconstructed planes of the two expe...
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