scholarly journals Simulating Low-Level Laser Propagation From Skin Surface To Lumbar Disc, Knee, Femur and Prostate Gland By Monte Carlo Method

2020 ◽  
Author(s):  
Trinh Tran Hong Duyen ◽  
Tran Anh Tu
Keyword(s):  
Monte Carlo ◽  
Laser Therapy ◽  
Prostate Gland ◽  
Skin Surface ◽  
Low Level Laser Therapy ◽  
Low Level ◽  
Laser Propagation ◽  
Low Level Laser ◽  
Level Laser ◽  
Simulation Results

Nowadays, the uses of laser and optics in the medical areas are extremely vivid, especially low-level laser therapy. The light with the wavelength of 633 nm to 1200 nm could penetrate and propagate deep in biological tissue. To develop the low-level laser therapy device, optimizing light delivery is critical to accurately stimulate the biological effects inside the biological tissue. Nevertheless, each form of the tissues at each zone on the body had various refractive optic, absorption, scattering, and anisotropy coefficients. This paper describes the simulation results of low-level laser propagation from skin surface at the lower spine, the knee, the femur and the prostate gland with four wavelengths (633 nm, 780 nm, 850 nm, and 940 nm) by the Monte Carlo method. These simulation results are the base for developing the low-level laser therapy device, that could be used in clinical for treating the fracture, knee osteoarthritis, spinal degeneration, and benign prostatic hypertrophy.

Monte Carlo simulation of photon densities inside the dermis in LLLT (low level laser therapy)

2009 ◽  
Vol 107 (3) ◽  
pp. 486-490 ◽  
Author(s):  
Parviz Parvin ◽  
Somayeh Eftekharnoori ◽  
Hamid Reza Dehghanpour
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Laser Therapy ◽  
Low Level Laser Therapy ◽  
Low Level ◽  
Low Level Laser ◽  
Level Laser

scholarly journals Optimize Illumination Parameter of Low-Level Laser Therapy for Hemorrhagic Stroke by Monte Carlo Simulation on Visible Human Dataset

2018 ◽  
Vol 10 (3) ◽  
pp. 1-9
Author(s):  
Ting Li ◽  
Pengbo Wang ◽  
Lina Qiu ◽  
Xiang Fang ◽  
Yu Shang
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Laser Therapy ◽  
Hemorrhagic Stroke ◽  
Low Level Laser Therapy ◽  
Low Level ◽  
Low Level Laser ◽  
Level Laser ◽  
Human Dataset ◽  
Visible Human

scholarly journals Effects of wavelength, beam type and size on cerebral low-level laser therapy by a Monte Carlo study on visible Chinese human

2015 ◽  
Vol 08 (01) ◽  
pp. 1540002 ◽  
Author(s):  
Ting Li ◽  
Yue Zhao ◽  
Yunlong Sun ◽  
Kai Li
Keyword(s):  
Monte Carlo ◽  
Laser Therapy ◽  
Near Infrared ◽  
Low Level Laser Therapy ◽  
Infrared Light ◽  
Near Infrared Light ◽  
Low Level ◽  
Low Level Laser ◽  
Level Laser ◽  
Beam Type

Low-level laser therapy (LLLT) has been clinically utilized for many indications in medicine requiring protection from cell/tissue death, stimulation of healing and repair of injuries, pain reduction, swelling and inflammation. Presently, the use of LLLT to treat stroke, traumatic brain injury and cognitive dysfunction are attracting growing interest. Near-infrared light is capable of penetrating into the cerebral cortex, allowing noninvasive treatments to be carried out with few treatment-related adverse events. Optimization of LLLT treatment effect is a crucial issue of this field; however, only a few experimental tests on mice for wavelength selection have been reported. We addressed this issue by low-cost, straightforward and quantitative comparisons on light dosage distribution within visible Chinese human head by Monte Carlo modeling of near-infrared light propagation. Optimized selection in wavelength, beam type and size were given based on comparisons among frequently used setups (i.e., wavelengths: 660, 810 and 980 nm; beam type: Gaussian and flat beam; beam diameter: 2, 4 and 6 cm). This study provided an efficient way for guiding the optimization of LLLT setup and selection on wavelength, beam type and size for clinical brain LLLT.

scholarly journals The Effectiveness of the Polarized Low-Level Laser in the Treatment of Patients With Myofascial Trigger Points in the Trapezius Muscles

2020 ◽  
Vol 11 (1) ◽  
pp. 14-19
Author(s):  
Dadollah Shahimoridi ◽  
Seyed Ali Shafiei ◽  
Bahram Yousefian
Keyword(s):  
Laser Therapy ◽  
Repeated Measures ◽  
Trigger Points ◽  
Pain Reduction ◽  
Skin Surface ◽  
Low Level Laser Therapy ◽  
Myofascial Trigger Points ◽  
Low Level ◽  
Low Level Laser ◽  
Level Laser

Introduction: This study assessed the effect of polarized low-level laser therapy (PLLLT) on the treatment of myofascial trigger points (MTrPs) in the trapezius muscles. Its effectiveness in pain reduction was compared to low-level laser therapy (LLLT). Methods: Sixty-four patients with MTrPs were randomly divided into 2 groups, namely PLLLT and LLLT. Each patient received treatment for a period of 2 weeks, 5 sessions a week. The intensity of laser irradiation to the skin surface was 6 J/cm2 . The system exit power was 160 mw at a 755 nm wavelength. The visual analog scale (VAS) for the 1st, 5th and 10th sessions was analyzed through two-way repeated measures ANOVA. Results: Increasing the number of treatment sessions was effective in reducing pain intensity (P>0.05). The effect of LLLT on pain reduction was significantly greater than that of PLLLT (P>0.05). Referred pain (RP), the limitation of neck movement (LNM), the presence of muscular taut band (PMTB) and the sensitivity of muscular taut band (SMTB) were reduced significantly by the end of the 10th session, compared with participants’ condition at the beginning of the 1st session in both groups. Conclusion: PLLLT and LLLT can effectively treat MTrPs in the trapezius muscles and they reduce RP, LNM, PMTB, and SMTB in particular. However, the effect of the LLLT was significantly greater than that of PLLLT. In accordance with the observed results, LLLT is recommended as an effective method for treating MTrPs.

Assessment of healing of dental implant surgical site following Low-Level Laser Therapy using Bio-Clinical parameters: An Exploratory Study

2020 ◽  
Author(s):  
VARSHA PALLED ◽  
DR. JITENDRA RAO ◽  
DR. RAGHUWAR DAYAL SINGH ◽  
DR. SHUCHI TRIPATHI ◽  
DR. KALPANA SINGH ◽  
...  
Keyword(s):  
Laser Therapy ◽  
Test Group ◽  
Low Level Laser Therapy ◽  
Control Group ◽  
Clinical Parameters ◽  
Implant Stability ◽  
Low Level ◽  
Implant Stability Quotient ◽  
Low Level Laser ◽  
Level Laser

The purpose of this study was to evaluate whether Low-Level Laser Therapy (LLLT) improves the healing of the implant surgical site with clinical and biochemical parameters.Thirty patients with an edentulous space spanning a single tooth were selected. The patients were randomly allocated to two groups - the control group and the test group. The test group received laser energy at a power of 2J/cm 2 with a total of 4-6J energy over each implant. Clinical parameters (Implant Stability Quotient, probing index, modified sulcus bleeding index)and osteoprotegerin (OPG) were assessed at baseline and follow-up intervals (2 weeks, 6 weeks, and 3 months).The test group showed significantly higher implant stability quotient compared to thecontrol group at 2 weeks(57.93±3.95 and 35.67±3.08; p<0.01) and 3months(58.86±3.75 and 67.06±3.78; p<0.01). A significant rise in OPG levels of the test group(686.30±125.36pg/ml at baseline and 784.25±108.30pg/ml at 3months;p<0.01) was seen contrary to significant decline in the control group (839.50±249.08pg/ml at baseline,415.30±78.39pg/ml at 3months;p<0.01). Within the limitations of the study, the study suggests that the healing of peri-implant hard and soft tissues may be enhanced with the use of LLLT as an explicit modality during the post-operative period.

Low-level laser therapy for neurosensory recovery after sagittal ramus osteotomy

2020 ◽  
Vol 69 (3) ◽  
Author(s):  
Paulo Esteves Pinto Faria ◽  
Astrid Temprano ◽  
Fábio Piva ◽  
Eduardo Sant'ana ◽  
Dênis Pimenta
Keyword(s):  
Laser Therapy ◽  
Low Level Laser Therapy ◽  
Low Level ◽  
Low Level Laser ◽  
Level Laser
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