New Book – Medical/Aesthetic Lasers & IPLs and Skin Treatments

I have been asked many times in the last few years for a recommendation for an introductory book describing the application of lasers and IPLs in aesthetic treatments. My answer was always the same – “There isn’t one!!” So, I finally took the plunge and decided to write one, with my colleague PA Torstensson. The… Continue reading New Book – Medical/Aesthetic Lasers & IPLs and Skin Treatments

Laser-IPL Penetration Depth – a more useful definition

The ‘standard’ definition of penetration depth in skin only considers the incident wavelength and optical properties of the skin. While this may be useful from a physics perspective, it is not particularly useful when considering clinical treatments. A more useful definition must include wavelength, anisotropy, spot diameter and incident fluence. All of these have an… Continue reading Laser-IPL Penetration Depth – a more useful definition

Tattoo removed in just 4 sessions using a QS Nd:YAG at 1064nm

The following is an experiment I carried out to test a theory. A number of experiences had made me think that the time between laser sessions is more important than first thought. My clinical group first developed scar-free laser tattoo removal back in the 1980s in Canniesburn Hospital, Glasgow, Scotland. Back then, we were using… Continue reading Tattoo removed in just 4 sessions using a QS Nd:YAG at 1064nm

Laser spot size – how it changes with distance from the target…

Most laser systems have a lens to focus the laser energy down to a sale spot diameter (see figure 1 below). However, in many systems, the focal point (where the spot diameter is the smallest) is outside the handpiece assembly. This has a potentially hazardous effect if not properly understood! The problem with this design… Continue reading Laser spot size – how it changes with distance from the target…

IPL filters

IPL systems typically use a Xenon flash lamp to generate light across a wide range of wavelengths, usually 400 to 1200 nm. To select a ‘useful’ range a filter is applied. These are generally ‘cut off’ filters which stop all wavelengths below a given value, from transmitting through. Hence, a 650 nm will stop all… Continue reading IPL filters

Carbon Facial treatment with a QS Nd:YAG laser

Recently I tried the new ‘carbon facial’ treatment using the 1064nm wavelength of the Q-switched Nd:YAG laser. My wife was keen to try it! I painted a little black carbon ink solution (which I made myself) onto my wife’s face. After about 20 minutes, or so, to allow it to dry, I applied the laser… Continue reading Carbon Facial treatment with a QS Nd:YAG laser

Experiments with India ink and a Q-switched Nd:YAG laser

What happens when India ink absorbs laser energy? I irradiated some dry India ink trapped between two glass slides here (the ink was allowed to dry overnight). I used 5 J/cm^2 with a 1064 nm wavelength. As you can see, the laser energy ‘vapourises’ the ink and leaves voids behind. But, very little ink leaves… Continue reading Experiments with India ink and a Q-switched Nd:YAG laser

UK Gov’t advice on re-opening your clinic – “Keeping workers and clients safe during COVID-10 in ‘close contact’ services.”

The UK Government has released a document which should help those of you planning to re-open your clinic soon. It is aimed specifically at hairdressers, beauty centres, tattoo shops etc, and all those places where ‘close contact’ with clients is necessary. Personally, I think it’s a bit ‘lightweight’ on the issue of clean air –… Continue reading UK Gov’t advice on re-opening your clinic – “Keeping workers and clients safe during COVID-10 in ‘close contact’ services.”