Patterns of response in head and neck cancer subregions using daily Quantitative MRI from MR-guided radiation therapy.

ABSTRACT:

Background and purpose

Quantitative MRI (qMRI) is an emerging technique for characterizing tissue microenvironments. Prior work has shown that daily qMRI during MR-guided radiotherapy (MRgRT) detects differential responses to hypofractionated radiotherapy (RT) in head and neck squamous cell carcinoma (HNSCC) within the primary gross tumor volume (GTVp). This exploratory study investigates whether subregions of HNSCC tumors show distinct qMRI responses to hypofractionated RT using contoured GTVp subregions and voxelwise data.

Materials and methods

Eighteen subjects with advanced HNSCC underwent MRgRT with daily qMRI over 15 fractions (total dose 50, 55, or 60 Gy). Daily intravoxel incoherent motion (IVIM) and relaxometry sequences were acquired on a 1.5 T MR-Linac. Median ADC

SUBMITTER: Bonate R 

PROVIDER: S-EPMC12590287 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature