Biomedical Engineering Reference
In-Depth Information
PDL, 6 ms, 7.5 J/cm
2
1
0.6
0.9
0.4
0.8
0.2
0
-0.2
0.7
0.6
-0.4
0.5
-0.6
-0.8
0.4
0.3
-1
0.2
-1.2
0.1
-1.4
-1.2
-1 -0.8 -0.6 -0.4 -0.2
0
0.2
0.4
0.6
0.8
1
1.2
MaxG, 10 ms, 36 J/cm
2
1
0.6
0.9
0.4
0.8
0.2
0
-0.2
0.7
0.6
0.5
-0.4
-0.6
-0.8
0.4
0.3
-1
0.2
-1.2
0.1
-1.4
-1.2
-1 -0.8 -0.6 -0.4 -0.2
0
0.2
0.4
0.6
0.8
1
1.2
Figure 2.9
Depths of coagulation with PDL and IPL. The deeper option of IPL spectrum allows for greater full thickness vessel heating.
Abbreviations
: IPL, intense
pulsed light; PDL, pulsed dye laser.
50 J/cm
2
, 10 ms
5 kWcm
-2
80 J/cm
2
, 100 ms
0.8 kWcm
-2
1000
100
10
1
0.1
400
500
600
700 800
Wavelength, nm
900
1000
1100
1200
Epidermis
Venous blood
Met-HgB
MaxG transmission
MaxG shifted transmission
Figure 2.10
Note absorption spectrum of HgB and output spectra of intense pulsed light handpiece; the green output is with stronger lamp pumping and the
orange output is the result of weaker lamp pumping. Deeper vessel heating should occur as spectrum shifts to right.
Abbreviation
: HgB, hemoglobin.
