Performance evaluation of an automated image registration algorithm using an integrated kilovoltage imaging and guidance system

Journal of Applied Clinical Medical Physics
Timothy H FoxEric Elder

Abstract

Image-guided radiation therapy delivery may be used to assess the position of the tumor and anatomical structures within the body as opposed to relying on external marks. The purpose of this manuscript is to evaluate the performance of the image registration software for automatically detecting and repositioning a 3D offset of a phantom using a kilovoltage onboard imaging system. Verification tests were performed on both a geometric rigid phantom and an anthropomorphic head phantom containing a humanoid skeleton to assess the precision and accuracy of the automated positioning system. From the translation only studies, the average deviation between the detected and known offset was less than 0.75 mm for each of the three principal directions, and the shifts did not show any directional sensitivity. The results are given as the measurement with standard deviation in parentheses. The combined translations and rotations had the greatest average deviation in the lateral, longitudinal, and vertical directions. For all dimensions, the magnitude of the deviation does not appear to be correlated with the magnitude of the actual translation introduced. The On-Board Imager (OBI) system has been successfully integrated into a feasible onl...Continue Reading

References

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Citations

Sep 6, 2012·Australasian Physical & Engineering Sciences in Medicine·Shamurailatpam Dayananda SharmaMalhotra Heigrujam
May 26, 2011·Biomedical Imaging and Intervention Journal·Kyt SeetJ Van Dyk
Mar 14, 2014·Practical Radiation Oncology·Michael P GramsLuis E Fong de los Santos
Jan 17, 2009·International Journal of Radiation Oncology, Biology, Physics·Linda X HongDennis Mah
May 5, 2009·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·Ju-Young SongByunk-Sik Nah
Jun 17, 2009·Journal of Medical Imaging and Radiation Oncology·F ForoudiK H Tai
Jun 22, 2010·Cancer·Daniel R SimpsonLoren K Mell
Apr 10, 2010·Journal of Medical Imaging and Radiation Oncology·L J BellK L Wiltshire
May 23, 2016·International Journal of Radiation Oncology, Biology, Physics·Ryan G PriceCarri Glide-Hurst
Sep 30, 2016·Journal of Applied Clinical Medical Physics·Jeffrey BarberDavid I Thwaites

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Methods Mentioned

BETA
imaging techniques
X‐ray

Software Mentioned

OBI
Eclipse

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