### Correlating Chest Surface Motion to Motion of the Liver using $\varepsilon$-{SVR} -- a Porcine Study

 Type of publication: Artikel in einem Konferenzbericht Buchtitel: MICCAI 2009, Part II Serie: Lecture Notes in Computer Science Band: 5762 Jahr: 2009 Monat: September Seiten: 356--364 Verlag: Springer Ort: London, United Kingdom Organisation: MICCAI Notiz: Motion Compensation in Radiosurgery Querverweis: MICCAI09: DOI: 10.1007/978-3-642-04271-3_44 Abriss: In robotic radiosurgery, the compensation of motion of internal organs is vital. This is currently done in two phases: an external surrogate signal (usually active optical markers placed on the patient’s chest) is recorded and subsequently correlated to an internal motion signal obtained using stereoscopic X-ray imaging. This internal signal is sampled very infrequently to minimise the patient’s exposure to radiation. We have investigated the correlation of the external signal to the motion of the liver in a porcine study using ε-support vector regression. IR LEDs were placed on the swines’ chest. Gold fiducials were placed in the swines’ livers and were recorded using a two-plane X-ray system. The results show that a very good correlation model can be built using ε-SVR, in this test clearly outperforming traditional polynomial models by at least 45 and as much as 74 %. Using multiple markers simultaneously can increase the new model’s accuracy. Nutzerfelder: file={emsb_09.pdf:emsb_09.pdf:PDF} Schlagworte: Autoren: Ernst, FlorisMartens, VolkerSchlichting, StefanBeširević, ArminKleemann, MarkusKoch, ChristophPetersen, DirkSchweikard, Achim Anhänge emsb_09.pdf [Bib|RIS]