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- Ruschin, MarkLund University,Lunds universitet,Medicinsk strålningsfysik, Malmö,Forskargrupper vid Lunds universitet,Medical Radiation Physics, Malmö,Lund University Research Groups (author)
Threshold pixel size for shape determination of microcalcifications in digital mammography: a pilot study.
- Article/chapterEnglish2005
Publisher, publication year, extent ...
- 2005-05-17
- Oxford University Press (OUP),2005
Numbers
- LIBRIS-ID:oai:gup.ub.gu.se/235257
- https://gup.ub.gu.se/publication/235257URI
- https://doi.org/10.1093/rpd/nch561DOI
- https://lup.lub.lu.se/record/140282URI
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- Language:English
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- 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 microm) and extracted from computed radiography (CR) images (50 microm) 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 microm 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 microm was sufficient for microcalcification shape determination for digitised screen-film images, 50 microm was only borderline sufficient for the CR digital images.
Subject headings and genre
- MEDICIN OCH HÄLSOVETENSKAP Klinisk medicin Radiologi och bildbehandling hsv//swe
- MEDICAL AND HEALTH SCIENCES Clinical Medicine Radiology, Nuclear Medicine and Medical Imaging hsv//eng
- Breast Diseases
- diagnosis
- Calcinosis
- diagnosis
- Female
- Humans
- Mammography
- instrumentation
- methods
- Pilot Projects
- Radiographic Image Interpretation
- Computer-Assisted
- methods
- Radiographic Magnification
- methods
- computed radiography
- 2.5 to 200 micron
- digitised screen-film
- shape identification
- digital mammography
- microcalcification
- shape determination
- threshold pixel size
Added entries (persons, corporate bodies, meetings, titles ...)
- Hemdal, BengtLund University,Lunds universitet,Medicinsk strålningsfysik, Malmö,Forskargrupper vid Lunds universitet,Medical Radiation Physics, Malmö,Lund University Research Groups(Swepub:lu)rfa-bhe (author)
- Andersson, IngvarLund University,Lunds universitet,Institutionen för translationell medicin,Medicinska fakulteten,Department of Translational Medicine,Faculty of Medicine(Swepub:lu)ront-ian (author)
- Börjesson, SaraGothenburg University,Göteborgs universitet,Institutionen för särskilda specialiteter, Avdelningen för radiofysik,Institute of Selected Clinical Sciences, Department of Radiation Physics (author)
- Håkansson, MarkusGothenburg University,Göteborgs universitet,Institutionen för särskilda specialiteter, Avdelningen för radiofysik,Institute of Selected Clinical Sciences, Department of Radiation Physics (author)
- Båth, Magnus,1974Gothenburg University,Göteborgs universitet,Institutionen för särskilda specialiteter, Avdelningen för radiofysik,Institute of Selected Clinical Sciences, Department of Radiation Physics(Swepub:gu)xbatma (author)
- Tingberg, AndersLund University,Lunds universitet,Medicinsk strålningsfysik, Malmö,Forskargrupper vid Lunds universitet,Medical Radiation Physics, Malmö,Lund University Research Groups(Swepub:lu)rfa-ati (author)
- Grahn, AnnaLund University,Lunds universitet,Medicinsk strålningsfysik, Malmö,Forskargrupper vid Lunds universitet,Medical Radiation Physics, Malmö,Lund University Research Groups(Swepub:lu)rfa-abj (author)
- Medicinsk strålningsfysik, MalmöForskargrupper vid Lunds universitet (creator_code:org_t)
Related titles
- In:Radiation protection dosimetry: Oxford University Press (OUP)114:1-3, s. 415-230144-84201742-3406
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