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8 May 1995 3D transvaginal ultrasound imaging for identification of endometrial abnormality
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A multi-center study has previously evaluated the use of 2-dimensional transvaginal ultrasound (TVS) to measure the thickness of the endometrium as a risk indicator for endometrial abnormality in women with postmenopausal bleeding. In this paper we present methods using 3-dimensional TVS in order to improve the measurement, shape analysis and visualization of the endometrium. Active contour techniques are applied to identify the endometrium in a 3D dataset. The shape of the endometrium is then visualized and utilized to do quantitative measurements of the thickness. The voxels inside the endometrium are volume rendered in order to emphasize inhomogeneities. Since these inhomogeneities can exist both on the outside and the inside of the endometrium, the rendering algorithm has a controllable opacity function. A 3-dimensional distance transform is performed on the data volume measuring the shortest distance to the detected endometrium border for each voxel. This distance is used as a basis for opacity computations which allows the user to emphasize different regions of the endometrium. In particular, the opacity function can be computed such that regions that violate the risk indicator for the endometrium thickness are highlighted.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Bjoern Olstad, Sevald Berg, Anders Herman Torp, Klaus P. Schipper, and Sturla H. Eik-Nes "3D transvaginal ultrasound imaging for identification of endometrial abnormality", Proc. SPIE 2432, Medical Imaging 1995: Physics of Medical Imaging, (8 May 1995);

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