Interpretation of calcifications in screen/film, digitized, and wavelet-enhanced monitor-displayed mammograms: a receiver operating characteristic study
| Autor: | Marcia S. Miller, Priya Venugopal, Stephanie D. Holman-Ferris, Laurence P. Clarke, Marios A. Gavrielides, Wei Qian, Robert A. Clark, Claudia Berman, Maria Kallergi |
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| Rok vydání: | 1996 |
| Předmět: |
Digital mammography
Computer science ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Digital image Breast Diseases Wavelet medicine Image Processing Computer-Assisted Mammography Humans Radiology Nuclear Medicine and imaging Computer vision X-Ray Intensifying Screens Digitization Observer Variation Pixel Receiver operating characteristic medicine.diagnostic_test Receiver operating characteristic analysis business.industry Calcinosis Radiographic Image Enhancement ROC Curve Female Artificial intelligence business |
| Zdroj: | Academic radiology. 3(4) |
| ISSN: | 1076-6332 |
| Popis: | Rationale and Objectives. The acceptance of filmless digital mammography is currently limited by digitization and display drawbacks, as well as bias toward hard-copy interpretation. In the current study, we evaluated a wavelet-based image enhancement method for the filmless interpretation of breast calcifications. Methods. A set of 100 mammograms (58 with calcification clusters) was digitized at 105 μm and 4,096 gray levels per pixel and was processed with nonlinear filters and wavelets. Standard receiver operating characteristic analysis was performed by four radiologists, who independently read the films, the unprocessed digital images, and unprocessed and wavelet-enhanced digital images presented simultaneously. Results. Statistical differences were observed between screen/film and unprocessed digitized mammography displayed on monitors. Differences were not significant when wavelet enhancement was included in the monitor display. Interobserver variation in the digitized reading was greater than in film reading, but the wavelet enhancement reduced the difference. Conclusion. Wavelet-enhanced digital mammograms may assist radiologists in diagnosing calcifications directly from computer monitors and may compensate for current technologic limitations. A study with a larger database is needed before this method is accepted for clinical use. |
| Databáze: | OpenAIRE |
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