Development of a non-contact diffuse optical tomography system for image reconstruction of blood vessel with NIR light

This research proposes a new non-invasive and non-contact diffuse optical tomography (DOT) system for imaging of blood vessel with CW near-infrared (NIR) light. A DOT system can measure the hemoglobin distribution inside tissue by detecting the NIR light emitting from the tissue. The proposed non-contact DOT system is based on the scanning system which offers the advantage of performing non-invasive, real time, and cost-effective measurement. The non-contact detection system is constructed with dual NIR CCD cameras and multiple lens system. This non-contact DOT system detects the light emitting from slab geometry. A Rytov method is used for reconstructing images from intensity information of CCD. The non-contact DOT system is experimentally tested with phantom consisting of paraffin wax and Intralipid. To improve the performance of the non-contact DOT system, modifications of inverse algorithm and scanning method are required.