JLA Vol:1 Iss:1 (A Retrospective Study on the Hazards of the Carbon Dioxide Laser Plume)
Rocco V. Lobraico
Michael J. Schifano
Kevin R. Brader
Ravenswood Hospital Medical Center, Wenske Laser Center, Chicago, Illinois
Recent experimental studies of airborne contaminants found in the carbon dioxide laser plume have raised questions as to the potential danger of serious viral transmission during laser procedures. These concerns originated from a study of the human papilloma wart virus that reported intact strands of the DNA virus in the laser plume during the ablation of verrucae with the carbon dioxide laser. However, the study did not demonstrate the viability of such viral remnants. Such viability is difficult to demonstrate due to the...
JLA Vol:1 Iss:1 (Endoholography in Medicine)
Marc D. Friedman
Hans I. Bjelkhagen
Biomedical Engineering, Northwestern University, Evanston, Illinois
JLA Vol:1 Iss:1 (Excimer Lasers for Industrial Processing: Results and Applications)
Lambda Physik GmbH, Go¨ttingen, Federal Republic of Germany
JLA Vol:1 Iss:1 (High‐Speed Laser Welding Discontinuities)
Charles E. Albright
Department of Welding Engineering, Ohio State University, Columbus, Ohio
JLA Vol:1 Iss:1 (Laser Application in Otolaryngology — Head and Neck Surgery)
Robert H. Ossoff
Vanderbilt University Medical Center, Department of Otolaryngology, Nashville, Tennessee
Since the discovery of the laser in 1959, a wide variety of lasers have been developed with numerous clinical applications in medicine and surgery. Lasers have had a great impact on the surgical approach to both benign and malignant diseases in Otolaryngology‐Head and Neck Surgery, and have enabled the otolaryngologist to manage diseases in the aerodigestive system primarily through an endoscopic approach. We will summarize the physical properties of the currently used lasers in otolaryngology, as well as their clinical applications.
JLA Vol:1 Iss:1 (Laser Applications in Biomedicine. Part I: Biophysics, Cell Biology, and Biostimulation)
Michael W. Berns
J. Stuart Nelson
Beckman Laser Institute and Medical Clinic, Department of Surgery, University of California, Irvine
The successful applications of lasers to biomedicine rely upon an adequate understanding of the principles of light interaction with tissue. These principles are based upon the fundamentals of photophysics and involve a variety of mechanisms of energy conversion: heat, photochemistry, non‐thermal bond breaking, fluorescence, and mechanical shock waves. All of these mechanisms are discussed in the context of biomedical and basic cellular studies. In addition, the mechanism and use of low power (milliwatt) lasers are examined ...
JLA Vol:1 Iss:1 (Resonant ATR (Attenuated Total Reflectance) Spectroscopy and Semiconductor Technology)
AT&T Bell Laboratories ‐ Engineering Research Center, Princeton, New Jersey
We review the resonant ATR spectroscopy as an effective way to enhance the sensitivity of the optical measurements in semiconductor technology. After a short introduction of the basic principles, we consider its application to the non‐destructive characterization of the multilayer structures used in the manufacture of electronics and optoelectronics devices (Resonant ATR technique).
JLA Vol:1 Iss:2 (A Study in Surface Alloying of Titanium Alloys)
Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad‐500 258, India
D. B. Goel
Department of Metallurgical Engineering, University of Roorkee, Roorkee‐247 667, India
A 5 KW CW CO2 laser has been used to alloy the surface of Ti6Al4V alloy with carbon. As a result the average microhardness was increased from 365 to 600 kg/mm.2 Compositional inhomogeneity was observed on the alloyed surface, however the compositional inhomogeneity index reduced considerably by cross scanning with defocused laser beam. Surface roughness of the alloyed surface was also studied and the roughn...
JLA Vol:1 Iss:2 (High Performance Laser Triangulation Ranging)
C. Murray Penney
GE Corporate Research and Development, Schenectady, New York 12301
Johnson Laboratories, 383 Hillen Road, Towson, Maryland 21204
Laser triangulation ranging can provide data rates to at least 10,000 points per second, with resolution on the order of one thousandth of an inch, while observing strongly uncooperative targets through hostile environments. Data rate has been increased to greater than 100,000 points per second for applications requiring high resolution 3‐D maps of extended uncooperative surfaces. One successful approach to these applications is described. Also, several optical and engineering characteristic...
JLA Vol:1 Iss:2 (ICALEO Holds First Conference on Lasers in Dentistry)
Chief of Dental Service, Ravenswood Hospital Medical Center and Wenske Laser Center, Chicago, Illinois