Study of light propagation in human and animal tissues by Monte Carlo simulation

Kumari, Sudha; Nirala, Anil Kumar

doi:10.1007/s12648-012-0024-3

Cited by 7 publications

(4 citation statements)

References 9 publications

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“…This result denotes to the presence of a relationship between long-term exposure and the probability of occurrence the biological damage due to increasing SAR values at the tissue, a lot of studies show that these damages occur when the SAR values exceed the safety limits determined by FCC, but most of these studies depends on SAR calculations at short-term exposure. From the results exhibited in this research, it has been noticed that the long exposure period contributed to creating the interference between pulses emitted from the antenna this interference may result in it strengthening or debilitating the pulse in tissue, as it has been shown in tables (1)(2)(3)(4)(5)(6).…”

Section: Discussionmentioning

confidence: 69%

“…The results arranged in tables (1)(2)(3)(4)(5)(6) show that increasing the exposure period of RF waves leads to increasing SAR values in Human Eye tissues, there are some values exceed the safety boundaries that preached by FCC that determined by 1.6 W/kg. This result denotes to the presence of a relationship between long-term exposure and the probability of occurrence the biological damage due to increasing SAR values at the tissue, a lot of studies show that these damages occur when the SAR values exceed the safety limits determined by FCC, but most of these studies depends on SAR calculations at short-term exposure.…”

Section: Discussionmentioning

confidence: 99%

“…SAR is typically expressed in units of watts per kilogram (W/kg). The SAR value is calculated using the following formula [4] [7] [8]. 𝑆𝐴𝑅 = 𝜎 × 𝐸 2 /𝑚 𝑑 (1) Where: It is important to note that the specific absorption rate depends greatly on the type of tissue that is exposed to radiation, as well as on the frequency of electromagnetic radiation and the distance from the radiation source.…”

mentioning

confidence: 99%

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Specific Absorption Rate in Human Eye Model Exposed to Mobile Phone Radiation: A FDTD Study

Shadidi,

Falih,

Muslim

2024

Preprint

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It is imperative to recognize that extended exposure to radiofrequency (RF) waves can significantly affect the specific absorption rate (SAR) values in human eye tissues. In this study, we calculated the SAR values for the multilayered models of the Human Head and the Human Eye through various exposure periods (30 min, 45 min, 1 hour, 1.5 hours, 2 h) at frequencies of 0.9 GHz and 1.8 GHz emitted from mobile phones antennas using MATLAB and the Finite Difference Time Doman (FDTD) method. The results indicate that increasing the exposure period of RF waves, results in elevated SAR values in the human eye tissues. Specifically, the Cornea in the Human Eye model experiences a drastic increase in SAR value to 19.44 W/kg after just 1.5 hours of exposure at a frequency of 0.9 GHz, which is a high value due to the increasing exposure period and interference. This significant increase in the SAR value presents a notable threat to one's health, as it is vulnerable to the constructive interference of electric waves from the antenna, which can amplify its strength. This is particularly crucial when prolonged exposure is considered. In light of these findings, it is imperative to prioritize safety and take all necessary measures to limit exposure to RF waves.

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Section: Discussionmentioning

confidence: 69%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Specific Absorption Rate in Human Eye Model Exposed to Mobile Phone Radiation: A FDTD Study

Shadidi,

Falih,

Muslim

2024

Preprint

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“…Based on this model, Schulz et al proposed a simplified model [21] using the perspective projection method by replacing the camera lens with a virtual pinhole. In 2009 and 2010, Chen et al published two improved models [28,29] based on the hybrid radiosity-radiance theorem. The influence of the camera lens was analyzed with the thin lens assumption in both models.…”

Section: Introductionmentioning

confidence: 99%

Angle-Dependent Transport Theory-Based Ray Transfer Function for Non-Contact Diffuse Optical Tomographic Imaging

2023

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This work presents a generalized angle-dependent ray transfer function that can accurately map the angular and spatial distribution of light intensities on the tissue surface onto a camera image plane in a non-contact camera-based imaging system. The method developed here goes beyond existing ray transfer models that apply to angle-averaged tomographic data alone. The angle-dependent ray transfer operator was constructed using backward ray tracing based on radiation surface theory. The proposed method was validated using numerical phantoms and experimental data from an actual non-contact imaging system.

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Comparison of wavelength-dependent penetration depths of lasers in different types of skin in photodynamic therapy

Mustafa

Jaafar

2012

Indian J Phys

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Study of light propagation in human and animal tissues by Monte Carlo simulation

Cited by 7 publications

References 9 publications

Specific Absorption Rate in Human Eye Model Exposed to Mobile Phone Radiation: A FDTD Study

Specific Absorption Rate in Human Eye Model Exposed to Mobile Phone Radiation: A FDTD Study

Angle-Dependent Transport Theory-Based Ray Transfer Function for Non-Contact Diffuse Optical Tomographic Imaging

Comparison of wavelength-dependent penetration depths of lasers in different types of skin in photodynamic therapy

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