Validation of supervised automated algorithm for fast quantitative evaluation of organ motion on magnetic resonance imaging

International Journal of Radiation Oncology, Biology, Physics
Varuna PrakashCynthia Ménard

Abstract

To validate a correlation coefficient template-matching algorithm applied to the supervised automated quantification of abdominal-pelvic organ motion captured on time-resolved magnetic resonance imaging. Magnetic resonance images of 21 patients across four anatomic sites were analyzed. Representative anatomic points of interest were chosen as surrogates for organ motion. The point of interest displacements across each image frame relative to baseline were quantified manually and through the use of a template-matching software tool, termed "Motiontrack." Automated and manually acquired displacement measures, as well as the standard deviation of intrafraction motion, were compared for each image frame and for each patient. Discrepancies between the automated and manual displacements of > or =2 mm were uncommon, ranging in frequency of 0-9.7% (liver and prostate, respectively). The standard deviations of intrafraction motion measured with each method correlated highly (r = 0.99). Considerable interpatient variability in organ motion was demonstrated by a wide range of standard deviations in the liver (1.4-7.5 mm), uterus (1.1-8.4 mm), and prostate gland (0.8-2.7 mm). The automated algorithm performed successfully in all patients b...Continue Reading

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Citations

Aug 3, 2010·International Journal of Radiation Oncology, Biology, Physics·Cynthia L EcclesLaura A Dawson
Feb 9, 2008·International Journal of Radiation Oncology, Biology, Physics·Anna KirilovaLaura A Dawson
Jan 29, 2011·Journal of Magnetic Resonance Imaging : JMRI·Warren D FoltzCynthia Ménard
Sep 29, 2009·International Journal of Radiation Oncology, Biology, Physics·Alan M NicholCharles N Catton
Oct 15, 2013·International Journal of Radiation Oncology, Biology, Physics·Derek S TsangLaura A Dawson
Sep 7, 2014·Practical Radiation Oncology·Barbara WysockaJolie Ringash
Jan 16, 2021·Journal of Applied Clinical Medical Physics·Maureen LeeMichael Velec

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