| The figure shows the transducer that we
are using for 3D imaging here. The transducer is moved across the tissue
in the scanning direction shown. The Imaging array captures multiple 2D
image slices. The Tracking array images remain coplanar between successive
images and therefore it is possible to track image motion using image matching
techniques. We use methods based on those widely used in MPEG moving image
compression. This method of 3D imaging is very versatile - the sonographer
can move the image in any scan geometry they want. It is also quite accurate
- approximately 5%.
Our objectives are to:
1. Improve accuracy of the technique or at least make it very robust
to various scan formats
2. Detect lumps in the tissue so that image regions associated with
lumps can be related to lumps that were previously palpated (detected by
finger pressure)
This work is funded by the Whitaker Foundation. This work is also
supported by equipment and transducer loaned by Acuson-Siemens.
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