کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2738350 | 1148178 | 2015 | 6 صفحه PDF | دانلود رایگان |
BackgroundCompression paddles can move during mammography exposures. Speculation suggests that this movement can cause image blurring. No research has been published to demonstrate whether such movement could cause image blurring.AimDevelop a method to determine whether paddle movement can cause image blurringMethodA Hologic Selenia Dimensions mammography machine calibrated to give compression force in Newtons (N) with 24 × 30 cm fixed and flexible paddles was used. Eleven metal ball-bearings with 1.50 mm diameter were inserted onto the surface of a deformable breast phantom. The ball-bearings were placed at various points, from nipple to chest wall. The phantom was compressed using the foot pedal then hand wound to 80 N and also 150 N respectively to represent low and high compression forces used in clinical mammography. Under these conditions, images were created by exposing the phantom/ball-bearings. Image blurring was determined by measuring the change in ball-bearing diameter (distortion) using computer software.ResultsBall-bearing diameters increased, illustrating the effect of compression paddle motion on the images. The change in ball-bearing diameter is the highest around the nipple region for both fixed (1.688 ± 0.013 mm at 80 N, 1.694 ± 0.005 mm at 150 N) and flexible (1.714 ± 0.003 mm at 80 N, 1.661 ± 0.005 mm at 150 N) paddles.ConclusionThe increase in ball-bearing diameter suggests that image blurring due to paddle movement can be identified on images of ball-bearings adhered to the surface of a deformable breast phantom. Increase in diameter could be used as an indicator of movement severity.
Journal: Radiography - Volume 21, Issue 1, February 2015, Pages 36–41