Fiducial marker based intra-fraction motion assessment on cine-MR for MR-linac treatment of prostate cancer

Physics in Medicine and Biology
D M de Muinck KeizerJ C J de Boer

Abstract

We have developed a method to determine intrafraction motion of the prostate through automatic fiducial marker (FM) tracking on 3D cine-magnetic resonance (MR) images with high spatial and temporal resolution. Twenty-nine patients undergoing prostate stereotactic body radiotherapy (SBRT), with four implanted cylindrical gold FMs, had cine-MR imaging sessions after each of five weekly fractions. Each cine-MR examination consisted of 55 sequentially obtained 3D datasets ('dynamics'), acquired over a 11 s period, covering a total of 10 min. FM locations in the first dynamic were manually identified by a clinician, FM centers in subsequent dynamics were automatically determined. Center of mass (COM) translations and rotations were determined by calculating the rigid transformations between the FM template of the first and subsequent dynamics. The algorithm was applied to 7315 dynamics over 133 scans of 29 patients and the obtained results were validated by comparing the COM locations recorded by the clinician at the halfway-dynamic (after 5 min) and end dynamic (after 10 min). The mean COM translations at 10 min were X: 0.0 [Formula: see text] 0.8 mm, Y: 1.0 [Formula: see text] 1.9 mm and Z: 0.9 [Formula: see text] 2.0 mm. The mean...Continue Reading

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Citations

Jul 12, 2020·Radiation Oncology·Annika MannerbergSofie Ceberg
Jul 6, 2020·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·D M de Muinck KeizerJ C J de Boer
Nov 27, 2020·Clinical and Translational Radiation Oncology·Jonathan MohajerAlison Tree
Dec 29, 2020·Frontiers in Oncology·Boris R ToccoAlison C Tree
Dec 31, 2020·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Zhong SuNancy Mendenhall
Apr 6, 2020·Cancer radiothérapie : journal de la Société française de radiothérapie oncologique·G CréhangeS Thureau
May 15, 2021·International Journal of Radiation Oncology, Biology, Physics·Marieke Juliet van SonJochem R N van der Voort van Zyp
Jul 24, 2021·Der Radiologe·Daniel WegenerArndt-Christian Müller
Jul 23, 2021·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·D M Muinck KeizerJ C J Boer
Sep 22, 2021·Radiation Oncology·Francesco CucciaStefanie Corradini
Sep 28, 2021·Radiation Oncology·J SchauleM Guckenberger

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