Laser radiation control in photodynamic therapy of tumors

This article presents the ideology and basic principles of designing diagnostic and therapeutic medical systems for treating malignant tumors by means of photosensitizers. The designed system is based on optoelectronic devices, which realize selective laser tumor destruction during photodynamic therapy. A distinguishing feature of this system is that laser-beam formation is performed in real time. This enables one to follow changes in the tumor shape during the treatment. As a result of this study, a photodynamic technique for selective phototreatment was developed and tested. Moreover, we detemined light doses for such treatment.