Fat Contour and Melting Near and Medium Infrared Light Dose

https://pocketdentistry.com/the-physics-of-lasers/
https://pubmed.ncbi.nlm.nih.gov/31008550/
https://www.fotona.com/en/treatments/2058/laser-lipolysis/
https://en.wikipedia.org/wiki/Infrared#:~:text=Infrared%20(IR)%2C%20sometimes%20called,than%20those%20of%20visible%20light.&text=IR%20wavelengths%20extend%20from%20the,1%20millimeter%20(300%20GHz).

wiki
near infrared 700-1400 nm
mid infrared 1400-3000 nm

Efficacy and safety of long pulse 1064 and 2940 nm lasers in noninvasive lipolysis and skin tightening

1064 nm, 2940 nm steps 1 and 2
side of waist or lower abdomen
laser
1x/2 weeks/8 weeks (4 treatments)
reduced waist circumference and total body fat, decreased fat thickness, improved skin stiffness.

Noninvasive body shaping is becoming a growing demand. The aim of this study was to investigate the efficacy and safety of the combined treatments of 1064 nm Nd:YAG and 2940 nm Er:YAG in noninvasive lipolysis and skin tightening. Ten females were enrolled, and all women’s side of the waist or the lower part of the abdomen were treated. In the first step, the 1064 nm Nd:YAG was used. As a second step, the 2940 nm Er:YAG laser was applied. Each woman was treated four times, once every 2 weeks. The effects were determined by comparative photo documentation, waist circumference measurement, two-dimensional B-mode ultrasonography and low-dose native computer tomography (CT), whereas body fat was monitored with bioelectric impedance. The tissue firmness was measured by ultrasound shear wave elastography. Combined laser treatment significantly reduced waist circumference and total body fat. Ultrasonography has revealed that the treatment considerably decreased fat thickness and improved skin stiffness in the treated region. Subcutaneous fat volume, measured by low-dose CT, displayed a moderate decrease in the waist region. The combined 1064 nm Nd:YAG and 2940 nm Er:YAG laser treatment results in the reduction of fat tissue and tightens the skin as confirmed by objective measurements.

1064 nm, 108 J/cm^2
2940 nm, 2 J/cm^2, Pulsed at 2 Hz

1064 nm, flux density (fluence/treatment time) was 1.2 W/cm2, at a fluence of 108 J/cm2
9 points: 5 upper part of abdomen
2 right side of waist
2 left side of waist
2940 nm, fluence 2 J/cm2, 2 Hz frequency

The females were treated with the combined 1064 nm Nd:YAG and 2940 nm Er:YAG laser (FOTONA SP Dynamis, TightSculpting PIANO and SMOOTH mode). Laser treatments were applied four times during the study. The first step was to use the PIANO mode, the 1064 nm Nd:YAG was applied with S11‐L‐Runner scanning hand piece, the scanning surface was 78 mm × 84 mm and power flux density (fluence/treatment time) was 1.2 W/cm2, at a fluence of 108 J/cm2. All participants’ treated skin areas were treated in nine fields, 5 (upper part of abdomen) +2 (right side of waist) +2 (left side of waist). The temperature of the skin surface was 42°C for 8 minutes. The skin’s temperature was checked by special MatrixView temperature monitor. During treatment, neither skin cooling nor local anesthesia was applied. The second step was to apply the SMOOTH mode, the 2940 nm Er:YAG laser with R11 handpiece and with a spot size of 7 mm at a fluence of 2 J/cm2 and 2 Hz frequency. We passed four times over the treated area with Er: YAG laser. Specific safety eyeglasses were worn during the treatment for both the operator and the patient. The participants reported only minimal sense of warmth. Total laser application lasted about 60 minutes, this time consisted of two consecutive steps. Treatment time was shorter, as we used the scanning handpiece, because this way multiple fields can be heated up to 42°C at the same time.