Medical Applications enabled by a motion-robust optical 3D sensor S. Ettl*, S. Fouladi-Movahed**, S. Bauer***, O. Arold*, F. Willomitzer*, F. Huber*, S. Rampp**, H. Stefan**, J. Hornegger***/****, G. Häusler* *Institute of Optics, Information and Photonics **Epilepsy Center, University Hospital of Neurology ***Pattern Recognition Lab, Department of Computer Science ****Erlangen Graduate School in Advanced Optical Technologies Friedrich-Alexander-University Erlangen-Nuremberg, Germany mailto:svenja.ettl@physik.uni-erlangen.de In the medical field, the demand for motion-robust 3D data acquisition is steadily growing, e.g. for capturing limbs to construct prostheses. For this purpose, an op- tical 3D sensor is required which enables a flexible and comfortable 3D capturing of body parts. A “Flying Triangulation” sensor enables such tasks. Two exemplary applications, one in epilepsy surgery and one in radiation therapy, are presented. 1 Introduction In the medical field, the demand for 3D data ac- quisition is steadily growing, e.g. for capturing limbs to construct prostheses. Often, the range of motion during such an acquisition is restricted and the pa- tient might be bedridden and unable to be positioned in a certain way. For this purpose, an optical 3D sen- sor is required which enables a flexible and comfort- able 3D capturing of body parts. The measurement principle “Flying Triangulation” [1] enables such measurement tasks. The sensor, based on light sectioning, can be freely moved around the object while capturing sparse 3D data with each single shot. The data is aligned and dis- played in real time and after a few seconds a dense 3D model of the object is generated. The sensor is scalable and hence enables the measurement of a wide range of objects (see Fig. 1). Fig. 1 The principle Flying Triangulation enables a motion- robust 3D acquisition of a wide range of objects. As representative medical applications, we show two examples: an application in epilepsy surgery and another application in radiation therapy. In epilepsy surgery, the goal is to locate and remove brain re- gions responsible for epilepsy by combining func- tional and anatomic data. For the co-registration of the two data sets, Flying Triangulation can be em- ployed. In radiation therapy, the patient position must be known for accurate dose delivery. It is captured employing Flying Triangulation. We present mea- surement results and discuss further fields of appli- cations. 2 Application in epilepsy surgery In epilepsy surgery, brain regions responsible for epilepsy have to be detected and removed by com- bining functional and anatomic data. The following information can be used (see Fig. 2): • functional electroencephalography (EEG) data • 3D positions of EEG electrodes • anatomical magnetic resonance imaging (MRI) data Fig. 2 Center: Part of an EEG measurement. Bottom left: The employed EEG cap. Right: Exemplary MRI data with a localized brain region. DGaO Proceedings 2012 – http://www.dgao-proceedings.de – ISSN: 1614-8436 – urn:nbn:de:0287-2012-XXXX-Y