The primary objective is to use MRF and IVIM MRI to demonstrate clinical feasibility and differentiation of tumor recurrence and radiation necrosis. This will be measured by the 3D-MRF T1 relaxation times. The difference in mean T1 between each cohort of participants will be measured.
The primary objective is to use MRF and IVIM MRI to demonstrate clinical feasibility and differentiation of tumor recurrence and radiation necrosis. This will be measured by the 3D-MRF T2 relaxation times. The difference in mean T2 between each cohort of participants will be measured.
The primary objective is to use MRF and IVIM MRI to demonstrate clinical feasibility and differentiation of tumor recurrence and radiation necrosis. This will be measured by comparing the MRF proton density maps of each cohort of participants. This will be compared using a t-test.
The primary objective is to use MRF and IVIM MRI to demonstrate clinical feasibility and differentiation of tumor recurrence and radiation necrosis. This will be measured by comparing the diffusion parameters measured by the IVIM method between the three cohorts of participants. This will be compared using a t-test.
The primary objective is to use MRF and IVIM MRI to demonstrate clinical feasibility and differentiation of tumor recurrence and radiation necrosis. This will be measured by comparing the perfusion parameters measured by the IVIM method between the three cohorts of participants. This will be compared using a t-test.
The objective is to compare the effects of radiation dose on development of radiation and necrosis and tumor recurrence by comparing participants in all cohorts (healthy participants with no brain disease, participants with brain tumors (treated), participants with brain metastases or primary gliomas (previously untreated)). The predictive ability will be assessed by comparing univariable ROC analysis, quantified using area under the curve (AUC).
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