Open AccessAdaptive replanning using cone beam CT for deformation of original CT simulation
Author(s) -
Bojechko Casey,
Hua Patricia,
Sumner Whitney,
Guram Kripa,
Atwood Todd,
Sharabi Andrew
Publication year - 2022
Publication title -
journal of medical radiation sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 18
eISSN - 2051-3909
pISSN - 2051-3895
DOI - 10.1002/jmrs.549
Subject(s) - cone beam ct , radiation treatment planning , computer science , plan (archaeology) , radiation therapy , cone beam computed tomography , computed tomography , head and neck , medical physics , radiology , medicine , nuclear medicine , surgery , geology , paleontology
Background During a course of radiation therapy, anatomical changes such as a decrease in tumour size or weight loss can trigger the need for repeating a computed tomography (CT) simulation scan in order to generate a new treatment plan. This adaptive approach requires a separate appointment for an additional CT scan which generates additional burden, cost, and radiation exposure for patients. Case Presentation Here, we present a case of a head and neck cancer patient who required palliative radiation for a large neck mass. During treatment, he had a remarkable response which required a replan due to rapid tumour downsizing. In this case, we used a novel technique to avoid repeating the planning CT simulation by using a mid‐treatment high‐quality cone beam CT (CBCT) to deform the secondary image (plan CT) of the original planning CT and generate a new adapted treatment plan. Conclusion This is the first report to our knowledge using a Halcyon CBCT to deform the original planning CT in order to generate a new radiation treatment plan, and this novel technique represents a new potential method of adaptive replanning for select patients.