On the use of particle filters for electromagnetic tracking in high dose rate brachytherapy.

We present a hybrid data analysis system which combines multi-dimensional scaling with particle filters to precisely determine sensor dwell positions in the catheters during subsequent radiation treatment sessions. Both techniques are complemented with empirical mode decomposition for the removal of superimposed breathing artifacts. We show that the hybrid model robustly and reliably determines the spatial positions of all catheters used during the treatment and precisely determines any  deviations of actual sensor dwell positions from the treatment plan. The hybrid system only relies on sensor positions measured with an EMT system and relates them to the spatial positions of the implanted catheters as initially determined with a computed X-ray tomography. PMID: 28796645 [PubMed - as supplied by publisher]

https://www.ncbi.nlm.nih.gov/pubmed/28796645?dopt=Abstract

Source: Physics in Medicine and Biology - August 10, 2017 Category: Physics Authors: Götz TI, Lahmer G, Brandt T, Kallis K, Strnad V, Bert C, Hensel B, Tome AM, Lang EW Tags: Phys Med Biol Source Type: research