PET/MRI in Patients With Suspected Prostate Cancer

June 12, 2023 updated by: Univ.-Prof. Dr. Marcus Hacker, Medical University of Vienna

Randomized Assessment of Patients With Clinically Suspected Prostate Cancer After Multiparametric Metabolic Hybrid Imaging to Evaluate Its Potential Clinical Domain: A Prospective, Randomized, Multi-arm, Multi-treatment Clinical Trial

This diagnostic clinical trial will be conducted according to a randomized, prospective, controlled, double-arm, single-centre design. The control will be implemented by comparing the PET/MRI results with the histopathological finding after radical prostatectomy (positive state), the assumed absence of a relevant prostate cancer focus if PET/MRI guided biopsy and standard biopsy are negative (negative state) and/or the detection of a biochemical tumor relapse [rising prostate specific antigen (PSA) after PSA nadir; secondary objective].

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

In the last years magnetic resonance imaging (MRI) as well as positron emission tomography (PET) of the prostate have emerged as promising imaging tools. MRI provides mainly morphologic information and, to an increasing degree, functional information on the tumor microenvironment by using multiparametric approaches leading to an increase in diagnostic accuracy. Transition and periurethral zone cancers and the identification of patients' individual risk (e.g. for the development of a metastatic disease after primary treatment) is still a limitation of this method. PET, concerning radiolabelled choline, provides functional and predicting data on tumor metabolism and aggressiveness and has been found to be of complimentary value to morphologic imaging but still with the caveat of false positive and false negative findings. To overcome these limitations of morphological and functional imaging techniques, hybrid imaging systems have been developed and introduced into clinical routine. Additionally, the recently developed 68Ga-labeled Prostate Specific Membrane Antigen (PSMA) provides a highly specific information on a possible metastatic spread of prostate cancer. Thus the combined use of PET-MRI has wide spread applications in prostate cancer diagnosis, staging and treatment planning.

The potentials of this novel technique in general and its impact on assessing patients' individual risk to support a therapy or active surveillance decision in a future modified urological patient management were not yet explored in detail, but an initial prospective clinical trial in 38 patients with a sequential PET/MRI technique demonstrated the ability of a significant improvement of the individual methods. This registered prospective, randomized clinical trial is intended to proof, in a first step, the superiority of PET/MRI vs. the actual clinical standard procedures by applying a stable multiparametric metabolic hybrid imaging protocol. The aim of this study is to reduce the number of unnecessary invasive procedures to a minimum (image guided biopsy) and to enable superior image guided risk stratification.

In this prospective, randomized, multi-arm, multi-treatment clinical trial 220 subjects will be included at 1 site within 3 years. With a maximum follow-up for an early biochemical relapse of 2 years the planned duration should not exceed 5 years. The primary objective will be answered after 36 months.

Study Type

Interventional

Enrollment (Actual)

220

Phase

  • Phase 3

Contacts and Locations

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

Study Contact

Study Locations

  • Austria
      • Vienna, Austria, 1090
        • Department of Biomedical Imaging and Image-guided Therapy

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

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • blood PSA level > 4.0 ng/ml and
  • free-to-total PSA ratio <22% and/or
  • progressive rise of PSA levels in two consecutive blood samples despite antibiotics

Exclusion Criteria:

  • antiandrogen therapy
  • prostate needle biopsy <21 days before PET/MRI
  • known active secondary cancer
  • endorectal coil not applicable (e.g. anus praetor with short rectal stump)
  • known active prostatitis (e.g. painful DRE)
  • known anaphylaxis against gadolinium-DOTA
  • patient's written informed consent not given
  • needle biopsy and/or prostatectomy compound not available for histology/immunohistochemistry

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: Diagnostic
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: standardized needle biopsy

All enrolled patients are examined by means of dual tracer PET / MRI. Images will be interpreted by 4 designated readers. The readers are blinded of the respective results among each other. A consensus of the two principal readers of nuclear medicine and radiology will serve as reference for the guided needle biopsy. Additionally the readers are blinded to any result of the pathological workout until the recruitment of the last patient is finished.

According to the randomization, the standardized 12 core TRUS (TransRectal UltraSound)-guided biopsy is performed without knowledge of imaging findings by the urologist. If the biopsy is negative patients will have an additional image-guided biopsy with 4 more cores samples. After a positive biopsy the subjects be treated according to normal clinical practice.
Drug: 68Ga- PSMA-HBED-CC
Patients will receive a dual-tracer PET/MRI scan. FEC and 68Ga-PSMA-HBED-CC, for tissue metabolism and surface marker expressions, as specific PET-tracers as well as multiparametric MRI methods (T2w, DCE, DWI) are used.
Device: Biograph mMR, Siemens
All PET-MRI examinations will be performed using a hybrid PET-MRI system (Biograph mMR, Siemens, Germany) capable of simultaneous data acquisition. The system consists of an MRI-compatible state-of the art PET detector integrated in a 3.0-T whole-body MRI scanner.
Experimental: image-guided biopsy

All enrolled patients are examined by means of dual tracer PET / MRI. Images will be interpreted by 4 designated readers. The readers are blinded of the respective results among each other. A consensus of the two principal readers of nuclear medicine and radiology will serve as reference for the guided needle biopsy. Additionally the readers are blinded to any result of the pathological workout until the recruitment of the last patient is finished.

Patients will have a standardized 12 core TRUS-guided biopsy without knowledge of imaging findings by the urologist. Patients randomized in this arm will have an additional image-guided biopsy with 4 more cores samples. After a positive biopsy the subjects be treated according to normal clinical practice.
Drug: 68Ga- PSMA-HBED-CC
Patients will receive a dual-tracer PET/MRI scan. FEC and 68Ga-PSMA-HBED-CC, for tissue metabolism and surface marker expressions, as specific PET-tracers as well as multiparametric MRI methods (T2w, DCE, DWI) are used.
Device: Biograph mMR, Siemens
All PET-MRI examinations will be performed using a hybrid PET-MRI system (Biograph mMR, Siemens, Germany) capable of simultaneous data acquisition. The system consists of an MRI-compatible state-of the art PET detector integrated in a 3.0-T whole-body MRI scanner.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Superiority of image guided biopsy using multiparametric metabolic hybrid imaging with FEC/PSMA-PET/MRI (Fluorethylcholin/Prostate Specific Membrane Antigen- PET/MRI)
Time Frame: 36 months
We hypothesize that the image guided biopsy using multiparametric metabolic hybrid imaging with FEC/PSMA-PET/MRI is superior in the detection of primary localized prostate cancer than the conventional biopsy approach with transrectal ultrasound in patients with suspected prostate cancer (according to the inclusion criteria) and could therefore significantly improve the detection rate of the dominant intraprostatic tumor lesion and reduce the number of biopsies needed for a correct histopathological diagnosis to a minimum in the future (PET/MRI guided biopsy).
36 months

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
tumor characterization
Time Frame: 5 years
This method should enable improved tumor characterization. A diagnostic accuracy of >80% is assumed in lesions >5mm (in axial, sagittal and coronal extension) for the ability of the multiparametric metabolic method to differentiate between Gleason ≤3+4=7 (7a) tumors and ≥4+3=7 (7b) tumors (as compared to histological whole mount tumor mapping) and to identify patients with a high risk of developing metastatic disease (as compared to the loss of the transcription factor STAT3(signal transducer and activator of transcription 3) and cell cycle regulator p14 in a molecular pathological workout of the radical prostatectomy specimen).
5 years
early biochemical relapse
Time Frame: 5 years
To evaluate, if the applied parameters of multiparametric metabolic imaging with FEC- and PSMA-PET/MRI are associated with the evidence of an early biochemical relapse after a PSA nadir <0.2ng/ml after primary treatment in a two years follow up.
5 years

Collaborators and Investigators

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

Sponsor

Medical University of Vienna

Collaborators

BSM Diagnostica GmbH Vienna
Siemens Healthcare GmbH

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)

January 1, 2016

Primary Completion (Actual)

May 1, 2022

Study Completion (Actual)

August 1, 2022

Study Registration Dates

First Submitted

January 15, 2016

First Submitted That Met QC Criteria

January 19, 2016

First Posted (Estimated)

January 20, 2016

Study Record Updates

Last Update Posted (Actual)

June 15, 2023

Last Update Submitted That Met QC Criteria

June 12, 2023

Last Verified

June 1, 2023

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • The RAPID study

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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