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- W1994375338 abstract "Purpose: To develop a scatter removal method for digital breast tomosynthesis based on physical measurements. Method and Materials: A Hologic prototype digital beast tomosynthesis system was used to generate projection images. A CIRS anthropomorphic breast phantom was first imaged at a low mAs with an array of beam stops between the x-ray source and the breast. For each projection image, local minima, which were near the centers of the beam-stop shadows, were located using a Matlab program. The pixel values at these local minima were then interpolated and a scatter image was generated. The breast phantom was then imaged again at a higher mAs without the beam-stop array. The total mAs of two exposures was kept the same as the mAs recommended by Hologic for a breast with the same thickness. The scatter-free projections were obtained by subtracting the scaled scatter images from the corresponding projections acquired in the second exposure. 3D breast was reconstructed from the scatter-free projections. Results: For a 6 cm breast, the scatter-to-primary ratio could be as high as 0.4 even though there was an air gap between the breast and the detector. The scatter-free projection images shown higher image contrast. Conclusion: Contrast-to-noise ratio may be increased and artifacts due to scatter may be reduced when 3D breast is reconstructed from scatter-free projections. The overall effect of scatter subtraction on the image quality needs further investigation." @default.
- W1994375338 created "2016-06-24" @default.
- W1994375338 creator A5086769993 @default.
- W1994375338 date "2008-06-01" @default.
- W1994375338 modified "2023-09-27" @default.
- W1994375338 title "SU-GG-I-132: A Scatter Removal Method for Digital Breast Tomosynthesis" @default.
- W1994375338 doi "https://doi.org/10.1118/1.2961530" @default.
- W1994375338 hasPublicationYear "2008" @default.
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