Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Patent
1996-02-02
1999-12-07
Smith, Ruth S.
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
600425, 600473, 600476, 25033902, 2503411, 2503417, 2503581, 2503601, A61B 500
Patent
active
059998369
ABSTRACT:
The present invention provides a method and apparatus for high resolution breast imaging using collimated non-ionizing acoustic radiation and electromagnetic radiation in the near ultraviolet, visible, infrared and microwave regions (i.e. "light") rather than ionizing x-radiation. The light used is of a narrow spectral bandwidth in that the optical properties of interest are relatively uniform over the bandwidth. The incident collimated light is transmitted through and backscattered out of a breast. Normal and diseased breast materials exhibit comparatively distinct characteristics when exposed to radiation and are thereby differentiated. Collimation can also be used to control the level of scattered radiation. Radiation coupling materials can be employed during image acquisition to enhance radiation coupling into and out of the breast as well as providing desirable absorption and scattering properties. Additional scatter reduction and/or improved sensitivity can be attained by compressing a region of the breast using contoured and/or flat compression plates of various sizes which may include an open region allowing access to the surface of the breast for irradiating a portion of the breast. An acoustic field can be introduced into a volume of breast tissue altering its optical qualities. These changes can be recorded by intersecting an optical field with the acoustic field, providing spatial information and tissue characterization.
REFERENCES:
patent: 4433690 (1984-02-01), Green et al.
patent: 4767928 (1988-08-01), Nelson et al.
Nelson Robert S.
Zach Reuven D.
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