Abstract
Parameters for evaluating the swallowing function include the larynx's upward and forward amount of movement, the time from thestart of swallowing to the maximum rise, and the moving speed of the larynx. Now, only one system the Swallowing video fluoroscopicexamination of swallowing(VF) can get parameters quantitatively. But, VF has problems for patients to be exposed to radiation, and for doctorsto take so long time and so much effort. So , we can not evaluate frequently. Then, we developed the system that can evaluate quantitatively ,safety ,easier and frequently without touching and invasion. we observe the movement of the throat surface during swallowing from below, tracking ofthe Adam's apple automatically, and detect the starting of swallowing and the most rising of larynx. The Adam's apple may sink into skin withrising, so not be visible from the outside. In this cases, we tried to complement the position of the Adam's apple by lower part skin's transformation. So, we can track automatically about 90% and can get parameters for evaluating the swallowing quantitatively.
