skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Accurate setup of paraspinal patients using a noninvasive patient immobilization cradle and portal imaging

Abstract

Because of the proximity of the spinal cord, effective radiotherapy of paraspinal tumors to high doses requires highly conformal dose distributions, accurate patient setup, setup verification, and patient immobilization. An immobilization cradle has been designed to facilitate the rapid setup and radiation treatment of patients with paraspinal disease. For all treatments, patients were set up to within 2.5 mm of the design using an amorphous silicon portal imager. Setup reproducibility of the target using the cradle and associated clinical procedures was assessed by measuring the setup error prior to any correction. From 350 anterior/posterior images, and 303 lateral images, the standard deviations, as determined by the imaging procedure, were 1.3 m, 1.6 m, and 2.1 in the ant/post, right/left, and superior/inferior directions. Immobilization was assessed by measuring patient shifts between localization images taken before and after treatment. From 67 ant/post image pairs and 49 lateral image pairs, the standard deviations were found to be less than 1 mm in all directions. Careful patient positioning and immobilization has enabled us to develop a successful clinical program of high dose, conformal radiotherapy of paraspinal disease using a conventional Linac equipped with dynamic multileaf collimation and an amorphous silicon portal imager.

Authors:
; ; ; ; ; ; ; ; ; ; ;  [1]
  1. Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York, New York, 10021 (United States)
Publication Date:
OSTI Identifier:
20726274
Resource Type:
Journal Article
Journal Name:
Medical Physics
Additional Journal Information:
Journal Volume: 32; Journal Issue: 8; Other Information: DOI: 10.1118/1.1951042; (c) 2005 American Association of Physicists in Medicine; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-2405
Country of Publication:
United States
Language:
English
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; CALIBRATION STANDARDS; CARCINOMAS; COLLIMATORS; CORRECTIONS; ERRORS; IMAGES; LINEAR ACCELERATORS; PATIENTS; RADIATION DOSE DISTRIBUTIONS; RADIATION DOSES; RADIOTHERAPY; SEMICONDUCTOR MATERIALS; SILICON; SPINAL CORD; VERIFICATION

Citation Formats

Lovelock, D Michael, Chiaho, Hua, Ping, Wang, Hunt, Margie, Fournier-Bidoz, Nathalie, Yenice, Kamil, Toner, Sean, Lutz, Wendell, Amols, Howard, Bilsky, Mark, Fuks, Zvi, Yamada, Yoshiya, Department of Neurosurgery, Memorial Sloan-Kettering Cancer Center, New York, New York 10021, and Department of Radiation Oncology, Memorial Sloan-Kettering Cancer Center, New York, New York 10021. Accurate setup of paraspinal patients using a noninvasive patient immobilization cradle and portal imaging. United States: N. p., 2005. Web. doi:10.1118/1.1951042.
Lovelock, D Michael, Chiaho, Hua, Ping, Wang, Hunt, Margie, Fournier-Bidoz, Nathalie, Yenice, Kamil, Toner, Sean, Lutz, Wendell, Amols, Howard, Bilsky, Mark, Fuks, Zvi, Yamada, Yoshiya, Department of Neurosurgery, Memorial Sloan-Kettering Cancer Center, New York, New York 10021, & Department of Radiation Oncology, Memorial Sloan-Kettering Cancer Center, New York, New York 10021. Accurate setup of paraspinal patients using a noninvasive patient immobilization cradle and portal imaging. United States. https://doi.org/10.1118/1.1951042
Lovelock, D Michael, Chiaho, Hua, Ping, Wang, Hunt, Margie, Fournier-Bidoz, Nathalie, Yenice, Kamil, Toner, Sean, Lutz, Wendell, Amols, Howard, Bilsky, Mark, Fuks, Zvi, Yamada, Yoshiya, Department of Neurosurgery, Memorial Sloan-Kettering Cancer Center, New York, New York 10021, and Department of Radiation Oncology, Memorial Sloan-Kettering Cancer Center, New York, New York 10021. 2005. "Accurate setup of paraspinal patients using a noninvasive patient immobilization cradle and portal imaging". United States. https://doi.org/10.1118/1.1951042.
@article{osti_20726274,
title = {Accurate setup of paraspinal patients using a noninvasive patient immobilization cradle and portal imaging},
author = {Lovelock, D Michael and Chiaho, Hua and Ping, Wang and Hunt, Margie and Fournier-Bidoz, Nathalie and Yenice, Kamil and Toner, Sean and Lutz, Wendell and Amols, Howard and Bilsky, Mark and Fuks, Zvi and Yamada, Yoshiya and Department of Neurosurgery, Memorial Sloan-Kettering Cancer Center, New York, New York 10021 and Department of Radiation Oncology, Memorial Sloan-Kettering Cancer Center, New York, New York 10021},
abstractNote = {Because of the proximity of the spinal cord, effective radiotherapy of paraspinal tumors to high doses requires highly conformal dose distributions, accurate patient setup, setup verification, and patient immobilization. An immobilization cradle has been designed to facilitate the rapid setup and radiation treatment of patients with paraspinal disease. For all treatments, patients were set up to within 2.5 mm of the design using an amorphous silicon portal imager. Setup reproducibility of the target using the cradle and associated clinical procedures was assessed by measuring the setup error prior to any correction. From 350 anterior/posterior images, and 303 lateral images, the standard deviations, as determined by the imaging procedure, were 1.3 m, 1.6 m, and 2.1 in the ant/post, right/left, and superior/inferior directions. Immobilization was assessed by measuring patient shifts between localization images taken before and after treatment. From 67 ant/post image pairs and 49 lateral image pairs, the standard deviations were found to be less than 1 mm in all directions. Careful patient positioning and immobilization has enabled us to develop a successful clinical program of high dose, conformal radiotherapy of paraspinal disease using a conventional Linac equipped with dynamic multileaf collimation and an amorphous silicon portal imager.},
doi = {10.1118/1.1951042},
url = {https://www.osti.gov/biblio/20726274}, journal = {Medical Physics},
issn = {0094-2405},
number = 8,
volume = 32,
place = {United States},
year = {Mon Aug 15 00:00:00 EDT 2005},
month = {Mon Aug 15 00:00:00 EDT 2005}
}