Title :
Non-Invasive Imaging and Characterization of Human Thorax Tissues by Non-Contact Scanning Multi-Probe Laser Reflectometry and Monte Carlo Simulation
Author :
Pandian, P.S. ; Singh, Megha ; Kumaravel, M.
Author_Institution :
Div. of Biomed. Eng., Indian Inst. of Technol., Madras
Abstract :
The normalized back-scattered intensity (NBI) profiles at various locations on the human thorax of a subject were obtained by multi-probe laser reflectometer. The laser radiations are guided by an optical fiber onto the human thorax tissues and the backscattered radiations are collected by three optical fibers placed at distance of 2 mm, 4 mm and 6 mm from the input fiber. The data collection of the human thorax tissue is carried out using an automatic non-contact scanning system controlled by the personal computer. The data after digitization, interpolation and filtering, are color-coded and displayed on the outline of the human thorax. These NBI pattern vary depending on the muscular, anatomical and vascular compositions and also on percentage of fat composition at various locations. For optical characterization the optical parameters, scattering (mus) and absorption (mua) coefficients and the anisotropy parameter (g) at each location on the human thorax, by matching of reflectance profiles with that as simulated by a Monte Carlo simulation (MCS) procedure were determined. The point-to-point variations of the optical parameters and NBI variations at various regions of the human thorax tissues are studied
Keywords :
Monte Carlo methods; backscatter; bio-optics; biological tissues; biomedical optical imaging; image coding; laser applications in medicine; measurement by laser beam; medical image processing; optical fibres; reflectometry; 2 mm; 4 mm; 6 mm; Monte Carlo simulation; anisotropy parameter; color-coding; data collection; human thorax tissues; image digitization; image filtering; interpolation; laser radiation; noncontact scanning multiprobe laser reflectometry; noninvasive imaging; normalized back-scattered intensity profile; optical absorption coefficient; optical characterization; optical fiber; optical scattering; personal computer; reflectance profile; tissue characterization; Automatic control; Fiber lasers; Geometrical optics; Humans; Optical fibers; Optical filters; Optical imaging; Optical scattering; Reflectometry; Thorax; Monte Carlo simulation; Multi-probe reflectometer; human thorax; optical parameters; reflectance profile;
Conference_Titel :
Signal Processing, Communications and Networking, 2007. ICSCN '07. International Conference on
Conference_Location :
Chennai
Print_ISBN :
1-4244-0997-7
Electronic_ISBN :
1-4244-0997-7
DOI :
10.1109/ICSCN.2007.350788