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Cancer Watch

Optical Tomography with Ultrasound Localization: Initial Clinical Results and Technical Challenges (p. 235-244)

Optical tomography with ultrasound localization utilizes co-registered ultrasound lesion structure information to guide optical imaging reconstruction. A hand-held probe consisting of a commercial ultrasound transducer and near infrared optical imaging sensors was used to simultaneously acquire ultrasound images and optical measurements. A dual-mesh scheme was used to map the ultrasound-visible lesions to finer-grid lesion regions and coarser-grid background regions for optical imaging reconstruction. As a result, optical imaging reconstruction was well-conditioned for inverse mapping of lesion hemoglobin concentration and blood oxygen saturation. Initial clinical results have shown that early stage invasive cancers may be distinguished by a two-fold greater total hemoglobin concentration compared with fibroadenomas and other benign lesions. Initial results of advanced cancers have shown that the hemoglobin distribution is highly distorted and heterogeneous and the distorted distributions correlate with histological microvessel density counts and could be used to assess chemotherapy response.




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TCRT June 2005

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Volume 4
No. 3 (p 227-310)
June 2005
ISSN 1533-0338

Quing Zhu, Ph.D.

Bioengineering Program
Electrical and Computer Engineering Department
University of Connecticut
371 Fairfield Rd, U2157
Storrs, CT 06269, USA
zhu@engr.uconn.edu