Monitoring Treatment Response With On-board DWI During Neo-adjuvant Chemo-radiation for Rectal Cancer Using Magnetic Resonance-guided-radiotherapy Systems
Trial Parameters
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Brief Summary
feasibility of using a diffusion sequence of a MRgRT system as an early marker of treatment response during nRCT of rectal adenocarcinoma.
Eligibility Criteria
Inclusion Criteria: 1. Patient over 18 years old. 2. Diagnosis of histologically confirmed rectal adenocarcinoma for which nRCT has been indicated. 3. Karnofsky Index (KPS) ≥ 70 or ECOG = 0 or 1 4. Signed consent to participation. 5. For women of childbearing age, effective contraception must also be agreed for the duration of treatment. 6. Affiliation to a social security regimen, or beneficiary of such a regimen. Exclusion Criteria: 1. Predominant mucinous component on initial MRI, biopsy and / or definitive pathology. Mucin may lead to overestimation of ADC values on DWIs. 2. Contraindications to the MRI procedure (non compatible pacemaker or other metallic foreign body, severe claustrophobia). 3. Exclusive radiation therapy. 4. Other associated neo-adjuvant treatment. 5. Delayed completion of the surgery (more than approximately 10 weeks after the end of the nRCT) or cancellation of the surgical procedure. 6. Contraindications to capecitabine: Severe hepatic impairment, severe rena