Combination of 68Ga-PSMA PET Data With Magnetic Resonance Spectroscopy Data (MRS) for Evaluating Prostate Cancer

Combination of 68Ga-PSMA PET Data With Magnetic Resonance Spectroscopy Data (MRS) for Evaluating Prostate Cancer


Lead Sponsor: Tel-Aviv Sourasky Medical Center

Source Tel-Aviv Sourasky Medical Center
Brief Summary

Prostate cancer is the second most common cancer among man and the fourth most occurring over all . Characterization and management of the diagnosed prostate cancer is a challenging task due to its clinically and morphologically diversity. Clinically, this cancer range from indolent growing slowly malignancy, which does not threatened the patient life, to aggressive tumor that metastasize rapidly with very bad prognosis. Therapy of prostate cancer ranges from a "watch and wait" approach to hormone deprivation therapy to aggressive surgical, radiation, and cryosurgical therapies depending on the cancer characteristics. Prostate cancer is diagnosed using digital rectal examination, serum prostate-specific antigen (PSA) testing and transrectal ultrasonography (US)-guided biopsies . Imaging technologies have been adapted as a non-invasive method to obtain a comprehensive assessment of the disease. MRI is widely used and more specifically multiparameter MRI (mMRI) for detection, staging and tumor localization. mMRI uses multiphase modes including diffusion-weighted and dynamic contrast-enhanced imaging in addition to T2-weighted imaging to identify and classify cancer type . Magnetic Resonance Spectroscopy (MRS) is MRI technique that allow detection of tissue metabolic composition which is occasionally used to characterize prostate cancer, however is not used as a standard procedure. By suppression of water and fat signal, MRS sequence can detect relationship between lower concentration prostatic metabolites such as citrate, choline, creatine, and polyamines in the cell cytosol and in the extra cellular ducts.

Other imaging modalities used to characterize prostate cancer include ultrasound (US), computerized tomography (CT), functional imaging like bone scanning (BS) and hybrid imaging like choline based positron emission tomography and CT (PET/CT). However all of these modalities show disappointing sensitivity .

Detailed Description

In recent years a new modality has emerged showing promising accuracy targeting the Prostate Specific Membrane Antigen (PSMA) which is significantly overexpressed in prostate tumor cells. By attaching radioactive isotope 68Ga to PSMA ligands, PET/CT molecular imaging can provide information regarding prostate cancer relapses and metastases with high contrast . Several recent studies showed the potential of 68Ga-PSMA PET in many application correlated with prostate cancer such as staging, identifying reoccurrence, guided biopsy and others . In the study, we wish to utilize the new hybrid PET/MR technology and combine 68Ga-PSMA PET studies with MRS information in order to explore correlation between the data obtained by both modalities and investigate the implication on the disease characteristics.

Overall Status Not yet recruiting
Start Date April 10, 2020
Completion Date April 10, 2022
Primary Completion Date May 10, 2021
Phase N/A
Study Type Interventional
Primary Outcome
Measure Time Frame
Patients who preformed 68Ga-PSMA for staging prostate cancer. 1 year
Enrollment 50

Intervention Type: Diagnostic Test

Intervention Name: PET/MR scan

Description: The PET will be performed with 68Ga-PSMA tracer. The 3 tesla magnet of the MRI will be used with sequence allowing MRS acquisition, additional sequences will include T2-weighted contrast and diffusion weighted contrast. Images will be analyzed visually and quantitatively. Quantitative analysis will include MR parameters such as DWI apparent diffusion coefficient (ADC) and PET quantitative metabolic data such as standard uptake values (SUV) or Ki (in case dynamic PET protocol will be applied). In addition, content relationship between metabolic entities detected will be extracted. Quantitative data will be correlated to clinical and pathological data to check accuracy, specificity and sensitivity.

Arm Group Label: prostate cancer Patients



Inclusion Criteria:

1.patients over the age of 18 with diagnosed prostate cancer at different stages of the disease.

Exclusion Criteria:

1. Patients younger than 18 years

2. contraindication to MRI or to intravenous gadolinium injection.

Gender: Male

Minimum Age: 18 Years

Maximum Age: 120 Years

Healthy Volunteers: No

Verification Date

November 2019

Responsible Party

Type: Sponsor

Has Expanded Access No
Condition Browse
Number Of Arms 1
Arm Group

Label: prostate cancer Patients

Type: Experimental

Description: patients over the age of 18 with diagnosed prostate cancer at different stages of the disease.

Patient Data Undecided
Study Design Info

Allocation: N/A

Intervention Model: Single Group Assignment

Primary Purpose: Diagnostic

Masking: None (Open Label)