By Sylvia H. Heywang-Kobrunner, Visit Amazon's Ingrid Schreer Page, search results, Learn about Author Central, Ingrid Schreer, , D. David Dershaw
Comprehensive and systematic, this significant re-creation covers all imaging modalities for diagnosing breast problems. you can find professional guidance at the function of mammography, high-resolution ultrasound, MRI and percutaneous biopsy to accomplish your diagnostic objectives, and make the most of a pragmatic overview of the physics, histology, pathology, and quality controls wanted by means of those that practice breast imaging procedures.
New key positive aspects: puppy and novel modalities, Lymph nodes (sentinel node), Staging breast melanoma New ACR classifications, Doppler ultrasound, Stereotactic ultrasound biopsy, Full-breast electronic imaging and computer-aided analysis, Mammotome, up-to-date references.
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Additional info for Diagnostic breast imaging: mammography, sonography, magnetic resonance imaging, and interventional procedures
However, a spiculated mass can also be caused by an area of fat necrosis or a radial scar. (Rarely, even suspicious microcalcifications are associated with papillomatosis, papilloma, fibroadenoma, plasma cell mastitis or fat necrosis). In addition to the factors already mentioned (threshold and selection of patients), the size of the findings decisively influences the expected specificity of the mammographic study. 14 í Screening Due to the high sensitivity of mammography in fatty tissue and its ability to reveal microcalcifications, mammography can detect small carcinomas at an early and prognostically favorable stage.
The automatic exposure control system is adjusted to match the sensitivity of the screen–film system. 31, 25 Not every automatic exposure control system is equally effective in achieving the desired optimum mean optical density on the film irrespective of the energy spectrum of the incident radiation behind the screen–film system. 11 a and b Roman The comparison shows that the significantly reduced scattered radiation in grid mammography permits significantly better visualization of the structures in the glandular tissue and of microcalcifications, which are located in the glandular tissue a Mammogram without grid b Mammogram taken 1 year later with grid 1.
Film system used), the system switches off the exposure. Since the sensitivity of the photocell varies with different radiation energies (that result from beam hardening behind breasts of different thickness or density and behind the image receptor), the automatic exposure control system must compensate for the variable breast thickness and density when determining the optimum cutoff dose. The quality of the automatic exposure control system determines how well it can achieve a constant film density independent of breast thickness and density.