PET/MR in Radiotherapy for Head and Neck Cancer Pilot

Study Overview
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Brief Summary
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This is a pilot non-intervention study that aims to introduce PET/MRI, a state of the art new imaging technique, into the radiotherapy treatment pathway of patients with head and neck cancer. Ultimately the investigators aim to establish appropriate scanning and image registration protocols, to allow progression to a randomized trial of adaptive radiotherapy dose escalation. The latter is thought to potentially improve outcomes in this group. Ten patients with squamous cell carcinoma (SCC) of the oropharynx, hypopharynx and larynx, planned for radical treatment with radiotherapy (+/-chemotherapy), will be recruited. Study participants will have two PET/MRI scans, with the radiotherapy immobilization devices in situ. The first will be done prior to the start of radiotherapy, the second half way through treatment. Image quality will be assessed by comparing to standard diagnostic scans and different registration methods will be compared to establish the best way of incorporating PET/MR image data into the radiotherapy planning system. Patient tolerability and workflow considerations will also be qualitatively assessed. Furthermore, a planning study will be conducted to establish relevant treatment protocols for a subsequent dose escalation trial. PET/MRI is an exciting new technology with a lot of potential in the context of adaptive radiotherapy dose escalation. Within this pilot study the investigators aim to address the technical challenges of using it in this context prior to proceeding to a randomized trial.

Official Title
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An Exploratory Study to Assess the Feasibility of Incorporating PET/MR in the Radiotherapy Pathway of Patients With Head and Neck Cancer and Guide Adaptive Dose Escalation

Conditions
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Head and Neck Cancer

Intervention / Treatment
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* Other: Imaging


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Written, voluntary, informed consent Age ≥ 18 Eastern Cooperative Oncology Group (ECOG) Performance Status ≤ 2 Life expectancy > 12 months Histologically proven SCC of the oropharynx, hypopharynx and larynx Radical radiotherapy +/- chemotherapy indicated as the primary treatment modality Visible disease (>1cm) at the primary site on any imaging modality performed within 4 weeks of starting radiotherapy treatment Staging PET/CT and diagnostic MRI of the head and neck images need to be available for comparison. Adequate organ function and absence of other major concurrent illness, allowing the patient to tolerate scanning regime Exclusion Criteria: Inability to provide informed consent Impaired renal function (serum creatinine of > 200) Severely impaired liver function Patients with allergies or contra-indications to the radio-tracer and/or contrast agent used in the study Severe claustrophobia or inability to tolerate PET or MRI scans General contra-indications to MRI, as defined in MRI safety departmental protocols Serious inter-current conditions or other non-malignant illnesses that are uncontrolled or whose control may be affected by participation in this study Any patient who has urinary or faecal incontinence ECOG Performance Status ≥ 3 Pregnant or breastfeeding women

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: Single arm imaging study<br>Single arm study: all patients have 2 PET/MR scans in the radiotherapy treatment position | Other: Imaging<br>* Single arm Imaging (PET/MR) study<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of scans where image quality is sufficient to characterise the primary tumour, assessed qualitatively by an experienced radiologist and oncologist |  | 6 months following study completion | 
| Proportion of patients that tolerated the full scanning protocol, assessed by tailored patient questionnaire |  | 6 months following study completion | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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PET/MRI