The effect of cell density on the fluid dynamics and oxygen transport in a micro-bioreactor with a tissue engineering scaffold was investigated. Variations of the permeability and porosity of the scaffold with cell density were estimated by a simple model. Based on the permeability and the porosity
Computerized analysis of tissue density effect on missed cancer detection in digital mammography
โ Scribed by Lihua Li; Zuobao Wu; Angela Salem; Zhao Chen; Li Chen; Florence George; Maria Kallergi; Claudia Berman
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 358 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0895-6111
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โฆ Synopsis
This paper presents a study of the analysis of breast density in missed cancer cases and the effect of tissue density on caner detection. A total of 100 missed cancer cases were collected. The breast density tissue was segmented with a statistical-based method. A set of tests was then applied to examine: (1) the differences in density between the mammograms at the detected stage and that at missed stage; (2) the density difference between the cancerous mammograms and their contra-lateral normal mammograms in the missed cancer cases; (3) the effect of breast density on CAD cancer detection. The results demonstrate that breast density is an important factor affecting not only radiologist's reading but also CAD performance. In order to improve early detection of breast cancer, a special effort should be directed to the high dense breast cases in CAD system design.
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