We describe layer-by-layer char-free ablation of hemorrhoids and other rectal lesions at very low CO2 laser power levels with a miniature `SwiftLaser' optomechanical flashscanner. Increased speed with excellent control, very shallow thermal damage, and less postoperative pain are the main advantages of the flashscan technology in rectal surgery.
David A. Arnold,
"SwiftLase: a new technology for char-free ablation in rectal surgery", Proc. SPIE 2396, Biomedical Optoelectronic Instrumentation, (1 May 1995); doi: 10.1117/12.208406; https://doi.org/10.1117/12.208406