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Figure 23.1
Excitation of an atom with (a) spontaneous and (b) stimulated emission of radiation.
Figure 23.5
Absorption spectra of the principle tissue chromophores. Er:Glass, erbium:glass; Er:YAG, erbium:yttrium‐aluminium‐garnet; IPL, intense pulsed light; K...
Figure 23.9
Carbon dioxide laser treatment of vascular ectasia in port‐wine stain (a) before and (b) after treatment.
Figure 23.13
Improvement in plantar warts (a) before and (b) after four pulsed dye laser sessions.
Figure 23.17
Pseudofolliculitis barbae (a) before and (b) after a treatment with a normal mode alexandrite (755 nm) laser. Residual hair is sparse and fine and the...
Figure 23.21
Contouring of rhinophyma (a) before and (b) after treatment with a CO2 laser usually produces excellent cosmetic outcomes.
Figure 23.2
Diagram of a laser showing the external power source, the active medium within the optical cavity and a system of fully and partially reflective mirro...
Figure 23.6
Ulcerated haemangioma (a) before and (b) after two pulsed dye laser treatments.
Figure 23.10
Facial telangiectasia (a) before and (b) after pulsed dye laser treatment.
Figure 23.14
Professional tattoo (a) before and (b) after multiple Q‐switched alexandrite (532 and 1064 nm) laser treatments. Note the hypopigmentation following t...
Figure 23.18
Paradoxical hypertrichosis on the neck seen after long pulsed Nd:YAG laser treatment.
Figure 23.22
Tattoo granulomas (a) before and (b) after CO2 laser ablation; they usually respond well.
Figure 23.3
Simplified representation of the pulse types.
Figure 23.7
Flat and superficial port‐wine stain (a) before and (b) after four pulsed dye laser treatments (595 nm) showing an unusually good response.
Figure 23.11
Facial erythema (a) before and (b) after one treatment with a flashlamp, showing minimal patterning and a near disappearance.
Figure 23.15
Penile lentiginosis (a) before and (b) after Q‐switched alexandrite laser treatment.
Figure 23.19
Angiofibromas (a) before, (b) 6 months after and (c) 24 months after CO2 laser resurfacing, showing a gradual recurrence of lesions over time.
Figure 23.4
Fate of incident light on skin.
Figure 23.8
(a–c) Port‐wine stain intermittently treated with the pulsed dye laser over a period of 12 years showing a relative lack of response in the mid‐face p...
Figure 23.12
Angiokeratoma (a) before and (b) after pulsed dye laser treatment.
Figure 23.16
Naevus of Ota (a) before and (b) after seven treatments with a Q‐switched Nd:YAG (1064 nm) laser, showing a reduction of abnormal pigment and minimal ...
Figure 23.20
Periorbital syringomas in a patient with skin phototype VI (a) before and (b) after 3 months of treatment with a CO2 laser.