Low grade gliomas (LGGs) are malignant, infiltrative and incurable brain tumours that typically present in the younger population. This project proposes to use non-contrast metabolic "Saturation Transfer" (ST)-MRI to evaluate LGG tumour progression and aims to predict early changes in LGG. Early identification of LGG patients whose tumours will progress will permit early interventions. ST-MRI does not involve any intravenous injection of contrast and which acquires metabolic information not seen by standard MRI.

Please see trial details below:

Inclusion Criteria:

1. Be at least 12 years of age;

2. Diagnosed with:

   1. Cohort A (pre-surgical): Suspected LGG (oligodendroglioma or astrocytoma), based on any combination of histological, molecular, radiological, and/or clinical findings; or
   2. Cohort B (post-surgical): IDH1/2-mutant or IDH-wildtype (WT) low-grade glioma candidate for observation

3. No contraindications to MRI;

4. eGFR > 30 ml/min;

5. No prior chemotherapy or radiation therapy;

6. No need for upfront treatment (surgery, chemotherapy, and/or radiation therapy)

7. Followed at either Sunnybrook Health Sciences Centre or at St Michael's Hospital

Exclusion Criteria:

1. Need for upfront post-surgical treatment with either chemotherapy and/or radiation therapy
2. Pregnancy