Microsecond-long flash photography of laser-induced ablation of biliary and urinary calculi.
High-speed flash photographs of laser-induced fragmentation of biliary and renal calculi under water were obtained using one-microsecond-long dye-laser pulses for both illumination and ablation. The photographs show the presence of a bubble with irregularities on the surface that suggest the early presence of debris or microbubbles. Fragmentation occurs before the bubble collapses, suggesting that fragmentation is due to laser-induced acoustic transients rather than to collapse of a laser-induced cavitation bubble.
Department of Dermatology, Wellman Research Laboratory, Massachusetts General Hospital, Boston 02114.
P
P
Teng
N S
NS
Nishioka
W A
WA
Farinelli
R R
RR
Anderson
T F
TF
Deutsch
D002769:Cholelithiasis / Q000473:pathology / Q000601:surgery*; D006801:Humans; D053685:Laser Therapy / Q000295:instrumentation*; D008096:Lithotripsy / Q000295:instrumentation*; D008953:Models, Anatomic; D010781:Photography / Q000295:instrumentation*; D014545:Urinary Calculi / Q000473:pathology / Q000601:surgery*