Frequency-domain endoscopic diffuse optical tomography reconstruction algorithm based on dual-modulation-frequency and dual-points source diffuse equation

2013 ◽  
Author(s):  
Zhuanping Qin ◽  
Qiang Hou ◽  
Huijuan Zhao ◽  
Yanshuang Yang ◽  
Xiaoqing Zhou ◽  
...  
Keyword(s):  
Frequency Domain ◽  
Modulation Frequency ◽  
Optical Tomography ◽  
Diffuse Optical Tomography ◽  
Reconstruction Algorithm ◽  
Tomography Reconstruction

Research on Diffuse Optical Tomography System in Frequency Domain

2014 ◽  
Vol 599-601 ◽  
pp. 1960-1966
Author(s):  
Tian Long Hou ◽  
Bin Fang
Keyword(s):  
Frequency Domain ◽  
Optical Tomography ◽  
Measurement Data ◽  
Diffuse Optical Tomography ◽  
Calculated Data ◽  
Reconstruction Algorithm ◽  
Reconstructed Image ◽  
Experimental Result ◽  
Scattering Coefficients ◽  
Tomography System

In the past decades, the requirements of non-invasive, non-radiation in medical imaging diagnosis and treatment is much higher. Diffusion optical tomography (DOT) technology increases more widespread concern. In this paper, a system designed in the frequency domain for diffuse optical tomography (DOT) imaging is described. The experimental platform utilizes 660nm laser modulated to 100MHZ, 16 parallel positions of detection at which a photomultiplier-tube is placed to detect flux of light on the external periphery of the tissue-simulating phantom made by gelatin. The reconstructed image of the absorption and scattering coefficients are obtained by using the Levenberg-Marquardt (L-M) reconstruction algorithm to solve for the optimal fitness between the measurement data and calculated data. This paper puts forward a new method that calculates the flux of area on the external periphery of the model by the forward algorithms to reduce the measurement error, which is caused by the mismatching between the flux of area the photomultiplier detects and the flux of dot the forward algorithms calculate in the traditional method. The experimental result shows that the proposed method can improve the reconstructed image of absorption and scattering coefficients

The reconstruction algorithm for endoscopic diffuse optical tomography based on effective detection area

2012 ◽  
Author(s):  
Zhuanping Qin ◽  
Yuan Wang ◽  
Huijuan Zhao ◽  
Yanshuang Yang ◽  
Xiaoqing Zhou ◽  
...  
Keyword(s):  
Optical Tomography ◽  
Diffuse Optical Tomography ◽  
Reconstruction Algorithm
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