Acquisition of 3D Facial Geometry of Patients' Scheduled for Radiotherapy Treatment

Study Overview
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Brief Summary
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This study investigates the feasibility of using 3D-Printing to manufacture masks used to immobilize patients undergoing radiotherapy treatment for tumors affecting the head and neck.

Detailed Description
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The current types of masks that are used in radiotherapy treatment sessions for those patients who have head-and-neck cancer are 'made to measure' and the methods currently employed to make them are invasive and in some cases patients' have found this to be particularly unpleasant. Their experience motivates research into less invasive and potentially more accurate techniques for their manufacture. To effectively develop an automatic manufacturing pipeline, and to assess the accuracy of the approach we need access to CT data from a cohort of patients for which we also have an accurate (ground truth) 3D facial model. Such a model can be acquired in a few minutes using a hand-held laser scanner.

Official Title
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Feasibility Study: Acquisition of Three Dimensional Facial Geometry of Patients' Scheduled for Head and Neck Radiotherapy Treatment.

Conditions
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Head and Neck Cancer

Intervention / Treatment
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* Device: Hand-held laser scanner


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Have a Head-and-neck cancer Receiving radiotherapy treatments (CT images) Exclusion Criteria: Children (age less than 18)

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 69 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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Arms and Interventions

| Intervention/Treatment |
| --- |
|Device: Hand-held laser scanner|The laser scanning is non-intrusive and the scan can be completed in approximately 15 minutes. The scanning process involves the patient sitting in a chair while a researcher performs the scan. As a precautionary measure we require the patient to wear an eye mask as although the scanner is CE marked and completely safe . The process can be completed in stages (e.g. 3 x 5 minutes) with a break of 2-3 minutes between each session. The laser scanner will then be moved around the patient to obtain a set of 3D points forming the surface of the patient's head. We believe the laser scanning to be the most accurate way to acquire the surface of the patient's face / head and we wish to compare the models we obtain with surfaces rendered from the patient's CT data set.|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| 3D facial geometry of patient's head | The resultant 3D facial geometry of patient's head will be used to construct a 3D digital model which will be used to evaluate the accuracy of the model generated by CT images. In other words, the outcome will be used as a ground-truth for the CT-derived model. | 15 minutes | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Head and Neck Cancer, Radiotherapy