| Autor: |
Hesham Elhalawani, Carlos E. Cardenas, Stefania Volpe, Souptik Barua, Sonja Stieb, Calvin B. Rock, Timothy Lin, Pei Yang, Haijun Wu, Jhankruti Zaveri, Baher Elgohari, Lamiaa E. Abdallah, Amit Jethanandani, Abdallah S.R. Mohamed, Laurence E. Court, Katherine A. Hutcheson, G. Brandon Gunn, David I. Rosenthal, Steven J. Frank, Adam S. Garden, Arvind Rao, Clifton D. Fuller |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Clinical and Translational Radiation Oncology, Vol 29, Iss , Pp 93-101 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2405-6308 |
| DOI: |
10.1016/j.ctro.2021.05.011 |
| Popis: |
Purpose: Head and neck cancers radiotherapy (RT) is associated with inevitable injury to parotid glands and subsequent xerostomia. We investigated the utility of SUV derived from 18FDG-PET to develop metabolic imaging biomarkers (MIBs) of RT-related parotid injury. Methods: Data for oropharyngeal cancer (OPC) patients treated with RT at our institution between 2005 and 2015 with available planning computed tomography (CT), dose grid, pre- & first post-RT 18FDG-PET-CT scans, and physician-reported xerostomia assessment at 3–6 months post-RT (Xero 3–6 ms) per CTCAE, was retrieved, following an IRB approval. A CT-CT deformable image co-registration followed by voxel-by-voxel resampling of pre & post-RT 18FDG activity and dose grid were performed. Ipsilateral (Ipsi) and contralateral (contra) parotid glands were sub-segmented based on the received dose in 5 Gy increments, i.e. 0–5 Gy, 5–10 Gy sub-volumes, etc. Median and dose-weighted SUV were extracted from whole parotid volumes and sub-volumes on pre- & post-RT PET scans, using in-house code that runs on MATLAB. Wilcoxon signed-rank and Kruskal-Wallis tests were used to test differences pre- and post-RT. Results: 432 parotid glands, belonging to 108 OPC patients treated with RT, were sub-segmented & analyzed. Xero 3–6 ms was reported as: non-severe (78.7%) and severe (21.3%). SUV- median values were significantly reduced post-RT, irrespective of laterality (p = 0.02). A similar pattern was observed in parotid sub-volumes, especially ipsi parotid gland sub-volumes receiving doses 10–50 Gy (p |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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