Threshold pixel size for shape determination of microcalcifications in digital mammography: a pilot study.
(2005) Second Malmo Conference on Medical X-Ray Imaging In Radiation Protection Dosimetry 114(1-3). p.415-423- Abstract
- The effect of pixel size on shape determination in screening digital mammography systems was studied using a shape identification task as the measured outcome. Ten microcalcifications on screen-films were digitised to a range of pixel sizes (2.5-200 μm) and extracted from computed radiography (CR) images (50 μm) acquired under equivalent imaging conditions. Fifteen observers attempted to identify the shape of each microcalcification at each pixel size. The results were collated to provide a fraction of correct responses vs. pixel size curve for each microcalcification. Averaging over all shapes, pixel values > 100 μm lead to a significant decrease in shape determination ability (p < 0.01) for digitised screen-film. For CR images,... (More)
- The effect of pixel size on shape determination in screening digital mammography systems was studied using a shape identification task as the measured outcome. Ten microcalcifications on screen-films were digitised to a range of pixel sizes (2.5-200 μm) and extracted from computed radiography (CR) images (50 μm) acquired under equivalent imaging conditions. Fifteen observers attempted to identify the shape of each microcalcification at each pixel size. The results were collated to provide a fraction of correct responses vs. pixel size curve for each microcalcification. Averaging over all shapes, pixel values > 100 μm lead to a significant decrease in shape determination ability (p < 0.01) for digitised screen-film. For CR images, half the shapes were not properly identified. Hence, although 20-100 μm was sufficient for microcalcification shape determination for digitised screen-film images, 50 μm was only borderline sufficient for the CR digital images (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/140282
- author
- Ruschin, Mark LU ; Hemdal, Bengt LU ; Andersson, Ingvar LU ; Börjesson, S ; Håkansson, M ; Båth, M ; Grahn, Anna LU and Tingberg, Anders LU
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- computed radiography, 2.5 to 200 micron, digitised screen-film, shape identification, digital mammography, microcalcification, shape determination, threshold pixel size
- in
- Radiation Protection Dosimetry
- volume
- 114
- issue
- 1-3
- pages
- 415 - 423
- publisher
- Oxford University Press
- conference name
- Second Malmo Conference on Medical X-Ray Imaging
- conference location
- Malmo, Sweden
- conference dates
- 2004-04-25
- external identifiers
-
- wos:000229927400076
- pmid:15933149
- scopus:21244472328
- pmid:15933149
- ISSN
- 1742-3406
- DOI
- 10.1093/rpd/nch561
- language
- English
- LU publication?
- yes
- id
- 48ac6cbe-674d-49af-b1a3-fe348f35ad10 (old id 140282)
- date added to LUP
- 2016-04-01 15:58:51
- date last changed
- 2024-04-11 15:21:02
@article{48ac6cbe-674d-49af-b1a3-fe348f35ad10, abstract = {{The effect of pixel size on shape determination in screening digital mammography systems was studied using a shape identification task as the measured outcome. Ten microcalcifications on screen-films were digitised to a range of pixel sizes (2.5-200 μm) and extracted from computed radiography (CR) images (50 μm) acquired under equivalent imaging conditions. Fifteen observers attempted to identify the shape of each microcalcification at each pixel size. The results were collated to provide a fraction of correct responses vs. pixel size curve for each microcalcification. Averaging over all shapes, pixel values > 100 μm lead to a significant decrease in shape determination ability (p < 0.01) for digitised screen-film. For CR images, half the shapes were not properly identified. Hence, although 20-100 μm was sufficient for microcalcification shape determination for digitised screen-film images, 50 μm was only borderline sufficient for the CR digital images}}, author = {{Ruschin, Mark and Hemdal, Bengt and Andersson, Ingvar and Börjesson, S and Håkansson, M and Båth, M and Grahn, Anna and Tingberg, Anders}}, issn = {{1742-3406}}, keywords = {{computed radiography; 2.5 to 200 micron; digitised screen-film; shape identification; digital mammography; microcalcification; shape determination; threshold pixel size}}, language = {{eng}}, number = {{1-3}}, pages = {{415--423}}, publisher = {{Oxford University Press}}, series = {{Radiation Protection Dosimetry}}, title = {{Threshold pixel size for shape determination of microcalcifications in digital mammography: a pilot study.}}, url = {{http://dx.doi.org/10.1093/rpd/nch561}}, doi = {{10.1093/rpd/nch561}}, volume = {{114}}, year = {{2005}}, }