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Diagnostic Imaging

Diagnostic breast imaging: mammography, sonography, magnetic by Sylvia H. Heywang-Kobrunner, Visit Amazon's Ingrid Schreer

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 issues. you will discover professional directions at the position of mammography, high-resolution ultrasound, MRI and percutaneous biopsy to accomplish your diagnostic ambitions, and take advantage of a realistic evaluate of the physics, histology, pathology, and qc wanted through those that practice breast imaging procedures.

New key gains: 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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Extra info for Diagnostic breast imaging: mammography, sonography, magnetic resonance imaging, and interventional procedures

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33 Slot mammography: This technique produces an image by exposing the breast line-by-line through a slit. Each exposed line is read behind the breast by an image receptor, which is collimated to the slit. By moving the slit over the breast, the complete breast is scanned. The technique effectively reduces scatter, thus improving image contrast. The additional dose, which is needed by a grid due to absorption within the grid, can be reduced. This technique is presently integrated in a fullfield digital mammography system, for which approval is filed (information from manufacturer).

In standard mammographic technique, however, the increased dose required by the grid is acceptable in light of the significant improvement in image quality, and it is more than offset by the reduced dose requirements of current screen–film systems. í Other Techniques for Scatter Reduction When spot films using a contact technique (coned-down views without collimation) are done, the scattered radiation from the surrounding tissue is reduced by the collimation to a small area of interest. In magnification mammography, good collimation in combination with the air gap effectively reduces scattered radiation, which is why this technique does not require a grid.

22 The contrast behavior of a mammographic film is shown in its respective characteristic curve. The characteristic curve shows the relationship between film density and the dose of radiation incident on the film. Optical density (blackening) is plotted against the logarithm of the radiation dose (Fig. 6). The steeper the curve, the higher the contrast. The contrast is not only decisive in the medium density range. 5) is even more important. For diagnostic purposes, uniformly high contrast in every density range would be desirable.

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