[Development of a measuring set-up for determination of light distribution of scattered light applicators for interstitial laser treatment]. / Entwicklung eines Messplatzes zur Bestimmung des Abstrahlverhaltens von Streulichtapplikatoren für interstitielle Laseranwendungen.

In the medical setting, scattering dome applicators are used in various therapeutic and diagnostic procedures, e.g. laser-induced interstitial thermotherapy. The present study reports on the development of an automatic measuring system for determining the light distribution along the active end of scattering dome applicators. Using a stepper motor, the applicator is gradually moved into an integrating sphere, in which the light intensity is measured with a photodetector. It was shown the light distribution is determined mainly by the conditions under which the laser beam is coupled to the transmission fiber. The results made it possible to optimize the production of applicators, and showed that the set-up was suitable for quality control use.

[In vitro studies of the specifications for methodological and technical equipment requirements of endoscopic infrared diaphanoscopy]. / In-vitro-Untersuchungen zur Spezifikation methodischer und apparatetechnischer Anforderungen der endoskopischen Infrarot-Diaphanoskopie.

Endoscopic infrared diaphanoscopy is a method of improving orientation in the nasal cavity during endoscopy-controlled endonasal surgery. The transillumination is expected to facilitate the localisation of the natural passageways between the paranasal sinuses and the nasal cavity during endoscopic procedures. The present study specifies the necessary conditions on the basis of in vitro examinations using an animal model (sheep) and an anatomical preparation of half of the human head. The questions as to what paranasal sinus is at all accessible to diaphanoscopy, whether the method actually enables the connecting pathways between an individual sinus and the nasal cavity to be identified, and what technical demands need to be met, are considered and answered.