High-resolution ultrasonic transmission tomography

Vasilis Z. Marmarelis; Tae-Seong Kim; Ramez E. N. Shehada

doi:10.1117/12.479887

23 May 2003 High-resolution ultrasound transmission tomography

Vasilis Z. Marmarelis, Tae-Seong Kim, Ramez E. N. Shehada

Proceedings Volume 5035, Medical Imaging 2003: Ultrasonic Imaging and Signal Processing; (2003) https://doi.org/10.1117/12.479887
Event: Medical Imaging 2003, 2003, San Diego, California, United States

Abstract

A novel system for High-resolution Ultrasonic Transmission Tomography (HUTT) is presented. The critical innovation of the HUTT system includes the use of sub-millimeter transducer elements for both transmitter and receiver arrays and multi-band analysis of the first-arrival pulse. The first-arrival pulse is detected and extracted from the received signal (i.e., snippet) at each azimuthal and angular location of a mechanical tomographic scanner in transmission mode. Each extracted snippet is processed to yield a “multispectral” vector of attenuation values at multiple frequency bands. Other acoustic attributes of the object (such as time-of-flight or wavelet decomposition coefficients) can also be obtained through snippet analysis. These vectors form a 3-D sinogram representing a multispectral augmentation of the conventional 2-D sinogram. A filtered backprojection algorithm is used to reconstruct a stack of multispectral images for each 2-D tomographic slice that may allow tissue characterization and improved image segmentation. We present illustrative examples of 2-D images formed at various frequency bands to demonstrate the high-resolution capability of the system and the potential of multispectral analysis. It is shown that spherical objects with diameter down to 0.3mm can be detected. Reconstruction of 3-D images has been achieved using multiple 2-D slices with sub-mm elevation differences.

Citation Download Citation

Vasilis Z. Marmarelis, Tae-Seong Kim, and Ramez E. N. Shehada "High-resolution ultrasound transmission tomography", Proc. SPIE 5035, Medical Imaging 2003: Ultrasonic Imaging and Signal Processing, (23 May 2003); https://doi.org/10.1117/12.479887

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