Rudolf Verdaasdonk is director and full professor of the Department Physics and Medical Technology of the VU University Medical Center and associated to the Department of Biophotonics and Medical Imaging of the VU University Amsterdam. He is involved in the Biomedical Optics field for 25 years. He is specialized in fiber delivery systems and visualization techniques of laser-tissue interaction for applied research, education and clinical applications. He is working closely with the clinical departments to develop and apply biomedical optics. He has been contributing and is actively participating in various session of SPIE BIOS conference for over two decades
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The use of 3D scanners for skin prick allergy testing: a feasibility study (Conference Presentation)
Phantoms (3-D printed hand, nose and ear, colored bread sculpture) were developed to compare a range from low-cost (Sense), medium (HP Sprout) to high end (Artec Spider, Vectra M3) scanners using different 3D imaging technologies, as to resolution, working range, surface color representation, user friendliness. The 3D scans files (STL, OBJ) were processed with Artec studio and GOM software as to deviation compared to the high resolution Artec Spider scanner taken as ‘golden’ standard. The HP Spout, which uses a fringe projection, proved to be nearly as good as the Artec, however, needs to be converted for clinical use. Photogrammetry as used by the Vectra M3 scanner is limited to provide sufficient data points for accurate surface mapping however provides good color/structure representation. The low performance of the Sense is not recommended for clinical use. The Artec scanner was successfully used to measure the structure/volume changes in the face after hormone treatment in transgender patients.
3D scanners can greatly improve quantitative measurements of surfaces and volumes as objective follow up in clinical studies performed by various clinical specialisms (dermatology, aesthetic and reconstructive surgery). New scanning technologies, like fringe projection, are promising for development of low-cost, high precision scanners.
Development and clinical trial of a practical vessel imaging system for vessel punctures in children
Comparison of laser- and RF-based interstitial coagulation systems for the treatment of liver tumors
Correlation of thermal and mechanical effects of the holmium laser for various clinical applications
As an engineer, scientist or technician working with lasers in the medical field, you like to educate your medical colleagues how to use the laser safely on patients. Educating them with formulas, graphs and models turns them off.
This course is a visual spectacle full of video clips, showing the effects of various medical lasers in simulations and tissues using high speed and thermal imaging techniques. <p> </p>
Using simple deduction, the many parameters of influence can be brought back to a simple equation: the amount of energy that is deposited in a particular volume (~absorption depth x beam diameter) of tissue within a particular length of time. With this background, the dynamics of the ablation process of tissue, the characteristics of laser delivery devices, the effect of focused beams and short lasers pulses will explained.<p> </p>
Students will be provided with a set of rules of thumb to explain physicians what tissue effects they can expect and use medical lasers safely.
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