Feasibility of MRI Workflow Alone in External Radiotherapy for the Treatment of Brain and Prostate Tumors

NCT ID: NCT04704804

Last Updated: 2022-03-11

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 94 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2020-07-24
• Study Completion Date: 2021-07-15

Brief Summary

In radiotherapy, Magnetic Resonance Imaging (MRI) is used as a complement to the CT scanner because it provides better tissue contrast and therefore more precise delineations without the need for additional irradiation. However, MRI does not allow the definition of the electronic densities of the tissues necessary for dose calculation.

In this work, we sought to measure the feasibility of a method for generating CT-synthetic images from MRI in terms of dosimetric and geometrical precision for the purpose of MRI workflow alone (see diagram). The cerebral sphere and the prostate are the two tumor locations considered. All patients will have a planning CT (reference) and an MRI in the treatment position. The contours of the structures will be contoured by a radiotherapist on both the MRI and the reference CT. Synthetic CTs will be generated from the MRI with the method of automatic assignment of densities in five classes. The volumes bypassed and the dosimetries performed will be compared. A study of the quality of the images generated from MRI for dose calculation and images for the verification of per-treatment positioning will be performed.

Detailed Description

This is a prospective single-center dosimetry study that exhaustively included brain tumor and prostate cancer patients treated at the ICO Site d'Angers by external radiotherapy and prior to which they were given an MRI and a simulation CT in treatment position over a 12-month period.

For patients who agree to participate in the study, CT-synthetic images will be generated from the MRI images by automatic assignment of densities (5 classes).

Reference CT images from CT and synthetic CT images from MRI will be available for comparison for all eligible patients.

Conditions

Prostate Cancer; Brain Cancer

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: PROSPECTIVE

Study Groups

Prostate cancer

Man with cancer and localized (non-metastatic) prostate cancer

Synthetic CT Scan

Intervention Type: DIAGNOSTIC_TEST

method of generating CT-synthetic image from MRI

Brain cancer

Male or Female with a brain tumor (primitive)

Synthetic CT Scan

Intervention Type: DIAGNOSTIC_TEST

method of generating CT-synthetic image from MRI

Interventions

Synthetic CT Scan

method of generating CT-synthetic image from MRI

Intervention Type: DIAGNOSTIC_TEST

Eligibility Criteria

Inclusion Criteria

1. Age ≥ 18 years old

2. Male or Female with a (primary) brain tumour or Male with cancer and localized (non-metastatic) prostate cancer

3. Patient having benefited from a planning MRI scan in treatment position performed according to the new acquisition modalities (allowing the generation of CT-synthetics by automatic assignment of densities) performed since January 2020 and a planning scanner in treatment position prior to external radiotherapy.

4. Good general condition (SP < 3)

Exclusion Criteria

1. Excluded forms of the disease,

2. MRI-specific contraindications (claustrophobia, foreign bodies)

3. Obesity preventing the placement of equipment (contention/antennae)

4. Poor general condition (SP > or = 2) preventing the patient from standing on the table -

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Institut Cancerologie de l'Ouest

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Damien AUTRET

Role: PRINCIPAL_INVESTIGATOR

INSTITUT DE CANCEROLOGIE DE L'OUEST

Locations

Institut de Cancerologie de L'Ouest

Angers, , France

Countries

France

Other Identifiers

ICO-2020-09

Identifier Type: -

Identifier Source: org_study_id