A LOW-COST METHOD FOR OPTICAL TOMOGRAPHY

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ERFANZADEH MOHSEN; ALIKHANI SAEID; ANSARI MOHAMMAD ALI; MOHAJERANI EZEDDIN

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Journal Paper

Paper Information

Journal: JOURNAL OF LASERS IN MEDICAL SCIENCES Year:2012 | Volume:3 | Issue:3 Page(s): 102-108

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Title

A LOW-COST METHOD FOR OPTICAL TOMOGRAPHY

Author(s)

ERFANZADEH MOHSEN | ALIKHANI SAEID | ANSARI MOHAMMAD ALI | MOHAJERANI EZEDDIN | Issue Writer Certificate

Keywords

OPTICAL TOMOGRAPHY

DIODE LASER

BIOLOGICAL PHANTOM

Abstract

Introduction: In this study, arrangement of a low-cost OPTICAL TOMOGRAPHY device compared to other methods such as frequency domain diffuse tomography or time domain diffuse tomography is reported. This low-cost diffuse optical imaging technique is based on the detection of light after propagation in tissue. These detected signals are applied to predict the location of in-homogeneities inside phantoms. The device is assessed for phantoms representing homogenous healthy breast tissues as well as those representing healthy breast tissues with a lesion inside.Methods: A DIODE LASER at 780nm and 50 mW is used as the light source. The scattered light is then collected from the outer surface of the phantom by a detector. Both laser and detector are fiber coupled. The detector fiber may turn around the phantom to collect light scattered at different angles. Phantoms made of intralipid as the scattering medium and ink as the absorbing medium are used as samples. Light is collected after propagation in the phantoms and the capability of the device in collecting data and detecting lesions inside the phantoms is assessed. The fact that the detection fiber orbits around the sample and detects light from various angles has eliminated the need to use several detectors and optical fibers. The results obtained from experiments are compared with the results obtaine from a finite element method (FEM) solution of diffusion equation in cylindrical geometry written in FORTRAN.Results: The graphs obtained experimentally and numerically are in good accordance with each other. The device has been able to detect lesions up to 13 mm inside the BIOLOGICAL PHANTOM.Conclusion: The data achieved by the OPTICAL TOMOGRAPHY device is compared with the data achieved via a FEM code written in FORTRAN. The results indicate that the presented device is capable of providing the correct pattern of diffusely backscattered and transmitted light. The data achieved from the device is in excellent correlation with the numerical solution of the diffusion equation. Therefore, results indicate the applicability of the reported device. This device may be used as a base for an optical imaging. It is also capable of detecting lesions inside the phantoms.

Cites

DIFFUSE OPTICAL TOMOGRAPHY: IMAGE RECONSTRUCTION AND VERIFICATION

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APA: Copy

ERFANZADEH, MOHSEN, ALIKHANI, SAEID, ANSARI, MOHAMMAD ALI, & MOHAJERANI, EZEDDIN. (2012). A LOW-COST METHOD FOR OPTICAL TOMOGRAPHY. JOURNAL OF LASERS IN MEDICAL SCIENCES, 3(3), 102-108. SID. https://sid.ir/paper/325810/en

Vancouver: Copy

ERFANZADEH MOHSEN, ALIKHANI SAEID, ANSARI MOHAMMAD ALI, MOHAJERANI EZEDDIN. A LOW-COST METHOD FOR OPTICAL TOMOGRAPHY. JOURNAL OF LASERS IN MEDICAL SCIENCES[Internet]. 2012;3(3):102-108. Available from: https://sid.ir/paper/325810/en

IEEE: Copy

MOHSEN ERFANZADEH, SAEID ALIKHANI, MOHAMMAD ALI ANSARI, and EZEDDIN MOHAJERANI, “A LOW-COST METHOD FOR OPTICAL TOMOGRAPHY,” JOURNAL OF LASERS IN MEDICAL SCIENCES, vol. 3, no. 3, pp. 102–108, 2012, [Online]. Available: https://sid.ir/paper/325810/en

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