Rapid, High Resolution 3-D Ultrasound Tomography
Annual rept. 1 Sep 1999-31 Aug 2000
LAWRENCE LIVERMORE NATIONAL LAB CA
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Ultrasonic transmission tomography holds out the hope of being a discriminating tool for breast cancer screening that is safe, comfortable, and inexpensive. From its inception, however, this imaging modality has been plagued by the problem of how to quickly and inexpensively obtain the data necessary for the tomographic reconstruction. The specific aim of this research is to determine how best to adapt a new microfabricated ultrasonic sensor currently under development for defense applications into a breast cancer screening tool. The sensor converts an acoustic wavefront into a modulated optical signal over an entire imaging plane. Using this device, it should be possible to obtain the data necessary for 3D imaging of a breast in a short time, without ionizing radiation, and without the need for compression of the breast. The research for the first year has focused on refinement of the sensor design and development of reconstruction algorithms. In this first year, we have automated the acquisition of the data, increased the speed of data acquisition by a factor of 100, increased the robustness of the sensor, incorporated a rotation stage in our test tank, and acquired and imaged diffraction tomographic data from a phantom.
- Anatomy and Physiology
- Medicine and Medical Research