Evaluation of Late Toxicity Following Intensity-Modulated Radiotherapy and Two Image-Guided Strategies With Corresponding Treatment Margins. (RCMIGI)

February 3, 2026 updated by: Institut du Cancer de Montpellier - Val d'Aurelle

Randomized Phase II Study Evaluating Late Toxicity Following Intensity-Modulated Radiotherapy and Two Image-Guided Strategies With Corresponding Treatment Margins. (RCMIGI)

The Calypso® System (Varian Medical Systems, Inc., Palo Alto, CA) is a recent technology using electromagnetic transponders implanted within the prostate. It is a real-time target tracking system that takes into account both inter- and intrafractional target motion. So the exact position and movement of the prostate can be determined during radiation therapy treatment.

The aim of this study is to assess pelvic late toxicity rate after intensity-modulated radiotherapy (IMRT) when using the Calypso® System with a reduction of treatment margins. In this randomized study, patients will receive IGRT treatment using the Calypso system or a conventional IGRT treatment.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Active, not recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

Prostate cancer is the most frequent cancer in men. Radiotherapy is one of the reference treatments for localized prostate cancer. Prostate was initially thought to be a non-moving target, but the newest reports have raised the contrary as evidence. Image-guided radiotherapy (IGRT) is a current standard treatment for localized prostate cancer which enables to take into account interfractional prostate motion before treatment.

The Calypso® System (Varian Medical Systems, Inc., Palo Alto, CA) is a recent technology using electromagnetic transponders implanted within the prostate. It is a real-time target tracking system that takes into account both inter- and intrafractional target motion. So the exact position and movement of the prostate can be determined during radiation therapy treatment.

As Planned Target Volume (PTV) margins integrate set-up margins and the management of organ motion, margin reduction can reasonably be considered in case of target motion management improvement.

To date, no prospective randomized clinical data is available using this technique for the treatment of low- or intermediate-risk prostate cancer patients with modern standard fractionation radiotherapy and image guidance.

The aim of this study is to assess pelvic late toxicity rate after intensity-modulated radiotherapy (IMRT) when using the Calypso® System with a reduction of treatment margins. In this randomized study, patients will receive IGRT treatment using the Calypso system or a conventional IGRT treatment.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
74

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • France
      • Montpellier, France, 34298
        • Institut regional du Cancer - Val d Aurelle

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years to 80 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Localized prostate cancer, histologically proven.
  • No evidence of metastases (M0). No evidence of lymph nodes involvement (N0) (bilateral lymph node dissection is not mandatory if lymph node involvement risk is low according to the Partin tables).
  • Low-risk or intermediate clinical stage according to the D'Amico classification (T1-T2 and Gleason < 8 and PSA < 20 ng/ml) (appendix 3).
  • No grade > 2 urinary or rectal clinical sign or symptom according to the CTCAE V4.03 scale.
  • Performance status ECOG ≤ 1.
  • No hip prosthesis or metallic vascular graft near the prostate.
  • No endopenian stent.
  • No pace maker, implanted defibrillator or neurostimulator.
  • No allergy to local anesthetics.
  • No irreversible anticoagulation or antiplatelet treatment for the implantation period.
  • Pelvic and abdominal anatomy compatible with the use of the Calypso® system (predictive detector to fiducials distance less than 19 cm, evaluated on planning CT-scan) (distance from skin surface to prostate center less than 17 cm).
  • Patient aged ≥ 18 and less than 80 years old.
  • Dated and signed written informed consent available.
  • Patients must be affiliated to a French Social Security System.

Exclusion Criteria:

  • Indication of pelvic nodes irradiation.
  • Prior pelvic irradiation.
  • Biopsy-proven seminal vesicle invasion.
  • Prior bilateral orchiectomy.
  • Prior radical prostatectomy.
  • Other malignancy except adequately-treated basal cell carcinoma of the skin or other malignancy from which the patient has been disease-free for at least 5 years.
  • Psychological, familial, sociological or geographical condition potentially hampering compliance with the study protocol and follow-up schedule; those conditions should be discussed with the patient before registration in the trial.
  • Other uncontrolled systemic disease (cardiovascular, renal, liver, pulmonary embolism, etc.).
  • Known VIH positive patients (no specific test needed).
  • Known homozygote ATM Mutation (Ataxia telengiectasia).

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Active Comparator: Image-guided radiation therapy (IGRT) with standard margins
moderate hypofractionation during 4 weeks
Radiation: moderate hypofractionation Radiotherapy
moderate hypofractionation Radiotherapy
Experimental: Calypso tracking system with margin reduction
moderate hypofractionation during 4 weeks after calypso beacon implant 10 days before
Radiation: moderate hypofractionation Radiotherapy
moderate hypofractionation Radiotherapy
Device: Calypso beacon implant
Calypso beacon implant before radiotherapy

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Assessment of Grade > 2 Late Pelvic Toxicities
Time Frame: between 3 months and 2 years after radiation period
assessment of grade > 2 late pelvic toxicities between 3 months and 2 years after radiation period
between 3 months and 2 years after radiation period

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Biological Relapse-free Survival
Time Frame: at 5 years after the radiotherapy
evaluate at 5 years with PSA dosage
at 5 years after the radiotherapy
Uncomplicated Survival (Local Recurrence or Metastatic Recurrence)
Time Frame: at 5 years after the radiotherapy
evaluate et 5 years after the treatment with radiological exam
at 5 years after the radiotherapy
Overall Survival
Time Frame: from the baseline to 5 years after the radiotherapy
number of death from baseline to 5 years after the treatment
from the baseline to 5 years after the radiotherapy

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Institut du Cancer de Montpellier - Val d'Aurelle

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Chair: Riou Olivier, Institut régional du Cancer de Montpellier

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
August 30, 2016

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
September 15, 2022

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 1, 2028

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
August 16, 2017

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 16, 2017

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
August 18, 2017

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
February 20, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
February 3, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
February 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • ICM-URC2015/33

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Individual Participant Data will not be shared at an individual level. Those data will be part of the study database including all enrolled patients

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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