Page 10 - An Introduction to Laser Tattoo Removal

Chapter 2 – Fundamentals of Laser Tattoo Removal v1.0
Microneedling and Laser Tattoo Removal .......................................................................................................115 Why are some tattoos NOT be removable by laser? .......................................................................................116 Summary .......................................................................................................................................................... 117
............................................................................................................................................ 118
Section 2.3 – The Last Bit ..................................................................................................... 118
Various thoughts on various subjects... ........................................................................................ 119
Can laser treatments cause cancer? ................................................................................................................119
The ‘Fitzpatrick Scale’ and Skin Colour ......................................................................................... 120
Pain Relief During Laser Tattoo Removal...................................................................................... 121
Depth of Penetration of Light in the Skin ..................................................................................... 122
Effect of Wavelength........................................................................................................................................122 Effect of Spot Diameter....................................................................................................................................123 Clinically ‘Useful’ Penetration Depth - Definition ............................................................................................124 Effect of Pulsewidth ......................................................................................................................................... 125
Heated volume following light energy absorption - tattoos.......................................................... 126
Energy Absorption versus depth......................................................................................................................126
Reactions in Tattoos – Photo-Mechanical or Acoustic .................................................................. 128
Summary of Light-Tissue Interactions as applied to tattoos ......................................................... 129
Conclusions.......................................................................................................................... 131 Glossary .............................................................................................................................. 132 Appendices .......................................................................................................................... 138
Appendix 1 - Animations and Videos:........................................................................................... 138
Appendix 2 – Nano- versus pico- .................................................................................................. 140
Appendix 3 - Calculating the Fluence (Energy Density) ................................................................. 141
Appendix 4 – Calibrating your laser.............................................................................................. 143
How to read a calibration chart .......................................................................................................................145
Appendix 5 – Calculating the Optical Density of your Laser Safety Glasses ................................... 146
Calculating the minimum Optical Density for a QS/picosecond laser..............................................................147
Appendix 6 – When a lens cracks or breaks .................................................................................. 149 Appendix 7 - Absorption of laser energy by ink particle atoms ..................................................... 150 Appendix 8 – Aftercare ................................................................................................................ 152 Appendix 9 – Taking Good Photographs....................................................................................... 153 Appendix 10 – Is your Clinic Room Air Clean?............................................................................... 154 Appendix 11 – Some of Mike’s Tattoo ‘Insects’ ............................................................................ 155
About the Authors ............................................................................................................... 163
Mike Murphy............................................................................................................................... 163 Per-Arne Torstensson .................................................................................................................. 164
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Chapter 2 LEVEL A Laser Tattoo Removal
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