Optical imaging for human body medical analysis using polychromatic infrared LED 700-1100nm

Aminoto, Toto; Priambodo, Purnomo Sidi; Sudibyo, Harry

doi:10.1063/1.5139377

Cited by 2 publications

(3 citation statements)

References 13 publications

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“…μ a,0 is the absorption coefficient of the homogeneous medium, and μ a,1 is the difference in the absorption coefficient between the inclusion and the homogeneous medium. Then, Equation ( 5) is obtained by arranging Equation (3).…”

Section: Light Transport In Tissue and Solution Of Diffusion Equationmentioning

confidence: 99%

“…Therefore, developing a noninvasive breast imaging technique to detect breast cancer is a necessity. One of those techniques is diffuse optical tomography (DOT), used for imaging biological tissues such as the brain and breast 3‐15 . Unlike others, DOT is inexpensive and harmless for patients because of using near‐infrared light.…”

Section: Introductionmentioning

confidence: 99%

“…One of those techniques is diffuse optical tomography (DOT), used for imaging biological tissues such as the brain and breast. [3][4][5][6][7][8][9][10][11][12][13][14][15] Unlike others, DOT is inexpensive and harmless for patients because of using near-infrared light.…”

Section: Introductionmentioning

confidence: 99%

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Image reconstruction for diffuse optical tomography using bi‐conjugate gradient and transpose‐free quasi minimal residual algorithms and comparison of them

Sevim

Üncü

Merçan

et al. 2021

Int J Imaging Syst Tech

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Diffuse optical tomography (DOT) is a new emerging modality in the diagnosis of soft tissue abnormalities. DOT image quality substantially depends on the reconstruction stage. In the literature, there are many reconstruction algorithms used in DOT systems. However, some algorithms were improved for solving specific cases but still need to be improved. The bi-conjugate gradient (BiCG) enhanced is one of the conjugate gradient (CG)-based reconstruction techniques for non-Hermitian systems. The BiCG provides a solution to a non-Hermitian system. However, it has erratic convergence in some cases. Therefore, DOT images reconstructed by BiCG can be at the wrong location and is inaccurate in some cases. In this study, we used continuous-wave diffuse optical tomography (CW-DOT) to acquire measurements from breast tissue phantoms with single or double inclusion at different depths and center-to-center separations and we have used the transpose free quasi minimal residual (TFQMR) reconstruction algorithm, improved as an alternative to BiCG for the first time in the CW-DOT system. Moreover, we have experimentally proved that TFQMR is superior to BiCG in some specific cases for the first time in CW-DOT. Therefore, we concluded that TFQMR has the potential to be able to be used in the reconstruction stage in CW-DOT.

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Section: Light Transport In Tissue and Solution Of Diffusion Equationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Image reconstruction for diffuse optical tomography using bi‐conjugate gradient and transpose‐free quasi minimal residual algorithms and comparison of them

Sevim

Üncü

Merçan

et al. 2021

Int J Imaging Syst Tech

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An Optical Wireless Communication System for Physiological Data Transmission in Small Animals

Domingues,

Pereira,

Silva

et al. 2024

Sensors

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In biomedical research, telemetry is used to take automated physiological measurements wirelessly from animals, as it reduces their stress and allows recordings for large data collection over long periods. The ability to transmit high-throughput data from an in-body device (e.g., implantable systems, endoscopic capsules) to external devices can also be achieved by radiofrequency (RF), a standard wireless communication procedure. However, wireless in-body RF devices do not exceed a transmission speed of 2 Mbit/s, as signal absorption increases dramatically with tissue thickness and at higher frequencies. This paper presents the design of an optical wireless communication system (OWCS) for neural probes with an optical transmitter, sending out physiological data through an optical signal that is detected by an optical receiver. The optical receiver position is controlled by a tracking system of the small animal position, based on a cage with a piezoelectric floor. To validate the concept, an OWCS based on a wavelength of 850 nm for a data transfer of 5 Mbit/s, with an optical power of 55 mW, was demonstrated for a tissue thickness of approximately 10 mm, measured in an optical tissue phantom.

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Optical imaging for human body medical analysis using polychromatic infrared LED 700-1100nm

Cited by 2 publications

References 13 publications

Image reconstruction for diffuse optical tomography using bi‐conjugate gradient and transpose‐free quasi minimal residual algorithms and comparison of them

Image reconstruction for diffuse optical tomography using bi‐conjugate gradient and transpose‐free quasi minimal residual algorithms and comparison of them

An Optical Wireless Communication System for Physiological Data Transmission in Small Animals

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