Single Fraction Real-time High-Dose-Rate Brachytherapy in Patients With Low and Intermediate Risk Prostate Cancer

NCT ID: NCT02342054

Last Updated: 2015-01-19

Basic Information

• Recruitment Status: UNKNOWN
• Clinical Phase: PHASE2
• Total Enrollment: 49 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2014-10-31
• Study Completion Date: 2017-12-31

Brief Summary

High-dose rate brachytherapy (HDR-BT) is an advanced technology theorized to be more advantageous than LDR-BT and External Beam Radiotherapy (EBRT), to the patient himself, and in terms of resource allocation. Studies of HDR-BT monotherapy have encouraging results in terms of biochemical control, patient survival and toxicity, but there are still certain limitations that preclude recommending HDR-BT monotherapy outside the setting of a clinical trial.

The primary endpoint of this study is to evaluate the safety, tolerance and impact on quality of life (QoL) of the BT-HDR 19Gy administered in single fraction in patients with low and intermediate risk prostate cancer. Secondary endpoint is to measure the efficacy, in terms of cancer control and satisfaction of the patients undergoing the experimental treatment.

Forty nine patients will be recruited for the experimental procedure Quality of Life, tolerance, gastrointestinal and genitourinary toxicity will be assessed using standardized procedures and scales. Patient satisfaction with the procedure will be appraised using five-category predetermined Likert scale questions.

Two different types of intermediate analyses will be performed: with 15 and 30 recruited patients.

The experimental treatment tested in this study is very innovative. Since prostate cancer is the most frequent cancer in men in Spain, this trial results are very likely to have a major impact on the standard therapy for prostate cancer in our National Health Service, allowing for a higher number of Hospitals within our country and other countries starting protocols of HDR BT 19Gy in single fraction.

Detailed Description

Treatment:

The patient´s treatment will consist of MRI-TRUS fusion single HDR brachytherapy fraction (1 fraction of 1900 cGray).

Brachytherapy performed under general anesthesia as an outpatient procedure

TRUS-MRI fusion:

T2 axial volumetric sequence (VISTA) is imported directly from the picture archiving and communication systems (PACS). Then MR images are reconstructed and segmented. Target volumes (prostate gland, dominant intraprostatic lesions (DILs) Organs at risk (OARs) urethra and rectum are delineated.

A transrectal sagittal volumetric ultrasound image is immediately acquired every 2 degrees, a rapid reconstruction algorithm converts the series of 2D images into a 3D volume, which is then displayed in axial, sagittal and coronal views and transferred to the module of fusion with the MRI.

The MRI images and the real-time sonography examination are displayed on a split-screen with the possibility of overlaying the images live in one image. A graphical user interface is used for rigid manual registration of the ultrasound and MRI volumes. This interface allows for displacements in the three dimensions and rotations, until both images are correctly superimposed.

Then the contoured structures are transferred to the US dataset, and these contours are slightly modified until a perfect matching with the US images is achieved.

Dose prescription:

Ultrasound images with the catheters in place will be exported to Oncentra Prostate. The prostate, Foley catheter and anterior rectal wall will be contoured. Catheters will be reconstructed on the planning system. Anatomy based inverse planning will be used for dwell time optimization.

The homogeneity parameters used for optimization aim are:

-For prostate V100 > 95%, V150 <35%, V200 < 6%, where Vn is the fractional volume of the organ that receives n% of the prescribed dose.

The dose constraints for the organ at risk will be:

• Urethral dmax < 110% and
• Rectal 1cc < 60% of prescribed dose.

Endpoints

Feasibility of higher doses administration, toxicity and efficacy will be measured

Conditions

Prostate Cancer

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

MRI-TRUS fusion guided Single Frac HDR

Patients treated with a Single Fraction Real-Time High-Dose-Rate (HDR 19Gy)

Group Type: EXPERIMENTAL

MRI-TRUS fusion guided Single Frac HDR

Intervention Type: RADIATION

Interventions

MRI-TRUS fusion guided Single Frac HDR

Intervention Type: RADIATION

Other Intervention Names

Single Fraction real time HDR (19Gy); Planning software Oncentra Prostate for Nucletron

Eligibility Criteria

Inclusion Criteria

• Men older than 18 years old
• Histologically confirmed diagnosis of adenocarcinoma of the prostate
• Clinical stage T1c/T2a disease
• Low and Intermediate risk disease defined as either Gleason 6 or Gleason 7 and PSA < 20 ng/ml.
• Prostate volume < 60 cc as determined by ultrasound, CT or MRI
• Life expectancy of more than 10 years
• Willing to give informed consent to participate in this clinical trial
• Able and willing to complete Expanded Prostate Index Composite (EPIC) questionnaire
• Eastern Cooperative Oncology Group (ECOG) of 0 - 2.
• Give competent informed consent to participate in this trial.

Exclusion Criteria

• Documented nodal or distant metastases
• Previous pelvic radiotherapy
• Previous trans-urethral resection of prostate, previous prostatectomy or HIFU
• Use of androgen deprivation therapy. Use of 5-alpha-reductase inhibitors is permitted
• Poor baseline urinary function defined as International Prostate Symptom Score (IPSS) >19
• Contra-indication to radical prostate radiotherapy
• Significant medical co-morbidity rendering patient unsuitable for general anaesthetic

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

Sponsors

Hospital de Cruces

OTHER

Sponsor Role: lead

Responsible Party

Alfonso Gomez-Iturriaga

Staff physician department of Radiation Oncology

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Alfonso Gomez-Iturriaga, MD, PhD

Role: PRINCIPAL_INVESTIGATOR

Hospital Universitario Cruces/Biocruces

Locations

Hospital Universitario Cruces

Barakaldo, Bizkaia, Spain

Site Status: RECRUITING

Countries

Spain

Central Contacts

Alfonso Gomez-Iturriaga, MD, PhD

Role: CONTACT

ALFONSO.GOMEZDEITURRIAGAPINA@osakidetza.net

946006233

Facility Contacts

Alfonso Gomez-Iturriaga, MD PhD

Role: primary

alfonso.gomezdeiturriaga@osakidetza.net

+34946006000 ext. 6232

References

Gomez-Iturriaga A, Casquero F, Pijoan JI, Minguez P, Espinosa JM, Irasarri A, Bueso A, Cacicedo J, Buchser D, Bilbao P. Health-related-quality-of-life and toxicity after single fraction 19 Gy high-dose-rate prostate brachytherapy: Phase II trial. Radiother Oncol. 2018 Feb;126(2):278-282. doi: 10.1016/j.radonc.2017.10.039. Epub 2017 Nov 15.

Reference Type: DERIVED

PMID: 29153462 (View on PubMed)

Other Identifiers

SINFRA_PROST

Identifier Type: -

Identifier Source: org_study_id