Surface Monitoring Technology to Remove The Mask - Stage 1

Inclusion Criteria * A diagnosis of head and neck cancer, any stage * ≥ 18 years of age * ECOG performance status 0-2 * Receiving radiation therapy for HNC with a thermoplastic immobilisation mask * Any other prior therapy allowed * Willing and able to comply with all study requirements * Must be able to read and complete questionnaires in English Exclusion Criteria * People with cognitive impairment which would preclude them from providing informed consent * People who are unable to speak and read English and for whom obtaining consent would be difficult. Withdrawal Criteria * Participants may withdraw from the study at any time before, during or after participation, and do not have to provide a reason. They may do so by advising any member of the study team, research office or their treating team, by completing the withdrawal of consent form, verbally or in writing. * Participants may be withdrawn from the study by the principal investigator, treating physician or attending clinician if they perceive the participant is experiencing or will likely experience physical or mental harm * No additional study data will be collected for a participant after they withdraw from the study * Withdrawing participants' data will be used unless the participant specifies they no longer give permission for the data to be stored or used, however, their data will not be removed from any analysis or publication that has already occurred, or from study databases once it has been de-identified * Participant will be replaced if they withdraw or are withdrawn from the study prior to starting the second couch session. This will be done by recruitment of an additional participant. * If a couch session is ended by the researcher or participant for reasons unrelated to the study (e.g. not related to equipment failure or participant non-acceptance), the session may be rescheduled, or participant replaced. * Reasons for withdrawal will be reported in any outcome publications.