Task-Specific Optimization of Mammographic Systems
Abstract
During this past year, our research has focused on four objectives. The first objective was to develop a simulation model for the radiographic appearance of breast masses and calcifications. This model was verified by a human observer performance experiment. The next objective explored the physical properties of a digital mammographic system, including resolution, noise, efficiency, and lag. The system was characterized for new beam qualities that used a tungsten anode, as these beams appear to produce higher quality digital images than conventional molybdenum beams. The third objective included physical measurements of display characteristics. This study introduced new means of removing the structured noise from Liquid Crystal Display (LCD) and Cathode Ray Tube (ORT) devices. The results from this study were applied to the fourth objective, which examined the impact of display resolution on the detection of breast masses and calcifications. We used two different observer models to inspect these images, including JNDMetrix, a visual discrimination model, and a non-prewhitening matched filter model with an eye filter. The results from this study will be used to guide human observer studies. Future work will explore the impact of dose reduction, detector properties, and image processing on detection of masses and calcifications.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2005
- Accession Number
- ADA435064
Entities
People
- Robert N Saunders
Organizations
- Duke University