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

Title: Quantitative Approach to Failure Mode and Effect Analysis for Linear Accelerator Quality Assurance

Abstract

Purpose: To determine clinic-specific linear accelerator quality assurance (QA) TG-142 test frequencies, to maximize physicist time efficiency and patient treatment quality. Methods and Materials: A novel quantitative approach to failure mode and effect analysis is proposed. Nine linear accelerator-years of QA records provided data on failure occurrence rates. The severity of test failure was modeled by introducing corresponding errors into head and neck intensity modulated radiation therapy treatment plans. The relative risk of daily linear accelerator QA was calculated as a function of frequency of test performance. Results: Although the failure severity was greatest for daily imaging QA (imaging vs treatment isocenter and imaging positioning/repositioning), the failure occurrence rate was greatest for output and laser testing. The composite ranking results suggest that performing output and lasers tests daily, imaging versus treatment isocenter and imaging positioning/repositioning tests weekly, and optical distance indicator and jaws versus light field tests biweekly would be acceptable for non-stereotactic radiosurgery/stereotactic body radiation therapy linear accelerators. Conclusions: Failure mode and effect analysis is a useful tool to determine the relative importance of QA tests from TG-142. Because there are practical time limitations on how many QA tests can be performed, this analysis highlights which tests are the most importantmore » and suggests the frequency of testing based on each test's risk priority number.« less

Authors:
;
Publication Date:
OSTI Identifier:
22649907
Resource Type:
Journal Article
Resource Relation:
Journal Name: International Journal of Radiation Oncology, Biology and Physics; Journal Volume: 98; Journal Issue: 1; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; BIOMEDICAL RADIOGRAPHY; FREQUENCY DEPENDENCE; IMAGES; LINEAR ACCELERATORS; PERFORMANCE; QUALITY ASSURANCE; RADIATION HAZARDS; RADIOTHERAPY; TIME LIMITATIONS; VISIBLE RADIATION

Citation Formats

O'Daniel, Jennifer C., E-mail: jennifer.odaniel@duke.edu, and Yin, Fang-Fang. Quantitative Approach to Failure Mode and Effect Analysis for Linear Accelerator Quality Assurance. United States: N. p., 2017. Web. doi:10.1016/J.IJROBP.2017.01.035.
O'Daniel, Jennifer C., E-mail: jennifer.odaniel@duke.edu, & Yin, Fang-Fang. Quantitative Approach to Failure Mode and Effect Analysis for Linear Accelerator Quality Assurance. United States. doi:10.1016/J.IJROBP.2017.01.035.
O'Daniel, Jennifer C., E-mail: jennifer.odaniel@duke.edu, and Yin, Fang-Fang. Mon . "Quantitative Approach to Failure Mode and Effect Analysis for Linear Accelerator Quality Assurance". United States. doi:10.1016/J.IJROBP.2017.01.035.
@article{osti_22649907,
title = {Quantitative Approach to Failure Mode and Effect Analysis for Linear Accelerator Quality Assurance},
author = {O'Daniel, Jennifer C., E-mail: jennifer.odaniel@duke.edu and Yin, Fang-Fang},
abstractNote = {Purpose: To determine clinic-specific linear accelerator quality assurance (QA) TG-142 test frequencies, to maximize physicist time efficiency and patient treatment quality. Methods and Materials: A novel quantitative approach to failure mode and effect analysis is proposed. Nine linear accelerator-years of QA records provided data on failure occurrence rates. The severity of test failure was modeled by introducing corresponding errors into head and neck intensity modulated radiation therapy treatment plans. The relative risk of daily linear accelerator QA was calculated as a function of frequency of test performance. Results: Although the failure severity was greatest for daily imaging QA (imaging vs treatment isocenter and imaging positioning/repositioning), the failure occurrence rate was greatest for output and laser testing. The composite ranking results suggest that performing output and lasers tests daily, imaging versus treatment isocenter and imaging positioning/repositioning tests weekly, and optical distance indicator and jaws versus light field tests biweekly would be acceptable for non-stereotactic radiosurgery/stereotactic body radiation therapy linear accelerators. Conclusions: Failure mode and effect analysis is a useful tool to determine the relative importance of QA tests from TG-142. Because there are practical time limitations on how many QA tests can be performed, this analysis highlights which tests are the most important and suggests the frequency of testing based on each test's risk priority number.},
doi = {10.1016/J.IJROBP.2017.01.035},
journal = {International Journal of Radiation Oncology, Biology and Physics},
number = 1,
volume = 98,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2017},
month = {Mon May 01 00:00:00 EDT 2017}
}