Ion beam tracking using ultrasound motion detection

Object Tracking Using Motion Direction Detection

We present an algorithm for tracking objects in a video sequence, based on a novel approach for motion detection. We do not estimate the velocity eld. Instead we detect only the direction of motion at edge points and thus isolate sets of points which are moving coherently. We use a Hausdor distance based matching algorithm to match point sets in local neighborhood and thus track objects in a vi...

Scanned Ion Beam Therapy of Moving Targets with Beam Tracking

Applying mean shift and motion detection approaches to hand tracking in sign language

Hand gesture recognition is very important to communicate in sign language. In this paper, an effective object tracking and hand gesture recognition method is proposed. This method is combination of two well-known approaches, the mean shift and the motion detection algorithm. The mean shift algorithm can track objects based on the color, then when hand passes the face occlusion happens. Several...

Fast adaptation of ion beam range for beam tracking: beam characterization∗

An ion-optical based fast adaptation of ion beam range for the treatment of moving targets with beam tracking was investigated. The method employs a deflection of the ion beam on a small single wedge-degrader positioned between two bending magnets for range adaptation [1, 2]. A prototype system was implemented at the therapy beam line at GSI and beam parameters of energy-adapted beams were char...

Dosimetric precision of an ion beam tracking system

BACKGROUND Scanned ion beam therapy of intra-fractionally moving tumors requires motion mitigation. GSI proposed beam tracking and performed several experimental studies to analyse the dosimetric precision of the system for scanned carbon beams. METHODS A beam tracking system has been developed and integrated in the scanned carbon ion beam therapy unit at GSI. The system adapts pencil beam po...