Daily Adaptive Radiation Therapy Using an Individualized Approach for Prostate Cancer (ARTIA-Prostate)

Daily Adaptive Stereotactic Body Radiation Therapy for Prostate Cancer With Urethral Sparing: A Prospective Trial Using an Individualized Approach to Reduce Urinary Toxicity

This trial is a prospective, single-arm, multi-center clinical trial designed to assess whether adaptive radiotherapy with urethral sparing for low to intermediate risk localized prostate cancer will translate into a decreased rate of patient reported acute urinary side effects, as measured by the patient reported EPIC-26 questionnaire, compared with the historically reported rate for non-adaptive, non-urethral sparing prostate SBRT.

Study Overview

• Status: Recruiting
• Conditions: Prostate Cancer
• Intervention / Treatment: Device: Daily adaptive SBRT with urethral sparing

• Study Type: Interventional
• Enrollment (Estimated): 132
• Phase: Not Applicable

Contacts and Locations

• Study Contact: Name: Sean Davidson, MASc; Phone Number: 1-437-991-8294; Email: sean.davidson@siemens-healthineers.com
• Study Contact Backup: Name: Claire McCann, PhD; Email: claire.mccann@siemens-healthineers.com

Study Locations

• Germany
  • Baden-Wurttemberg
    • Stuttgart, Baden-Wurttemberg, Germany, 70174
      • Recruiting
      • Klinikum Der Landeshauptstadt Stuttgart gKAöR
      • Contact: Danilo Trijic, MD; Phone Number: 04971127854668; Email: D.Trijic@klinikum-stuttgart.de
      • Contact: Marc Münter, MD; Phone Number: 04971127834201; Email: M.Muenter@klinikum-stuttgart.de
      • Principal Investigator: Marc Münter, MD
  • Saarland
    • Homburg, Saarland, Germany, 66421
      • Recruiting
      • Universitätsklinikum des Saarlandes (Saarland Univerisity Hospital)
      • Contact: Markus Hecht, MD; Phone Number: 0049 6841 16 24874; Email: markus.hecht.clinicaltrials@uks.eu
      • Contact: Wiebke Pirschel, MSc; Phone Number: 0049 6841 16 24874; Email: wiebke.pirschel@uks.eu
      • Principal Investigator: Markus Hecht, MD
• Spain
  • Navarre
    • Pamplona, Navarre, Spain, 31008
      • Recruiting
      • Hospital Universitario de Navarra
      • Contact: Marta Barrado Los Arcos, MD PhD; Phone Number: 0034-848-488482; Email: marta.barrado.losarcos@navarra.es
      • Contact: Elena Villafranca Iturre, MD; Phone Number: 0034-848-488482; Email: elena.villafranca.iturre@navarra.es
      • Principal Investigator: Marta Barrado Los Arcos, MD
• United States
  • California
    • Duarte, California, United States, 91010
      • Recruiting
      • Duarte Cancer Center
      • Principal Investigator: Percy Lee, MD
      • Contact: Percy Lee, MD; Phone Number: 833-672-4068; Email: percylee@coh.org
    • Irvine, California, United States, 92618
      • Recruiting
      • City of Hope Orange County Lennar Foundation Cancer Center
      • Principal Investigator: Percy Lee, MD
      • Contact: Percy Lee, MD; Phone Number: 833-672-4068; Email: percylee@coh.org
  • Massachusetts
    • Boston, Massachusetts, United States, 02115
      • Active, not recruiting
      • Brigham and Women's Hospital
  • Missouri
    • St Louis, Missouri, United States, 63110
      • Recruiting
      • Washington University in St. Louis
      • Contact: Lindsey Mayer, CCRP; Phone Number: 314-482-9202; Email: lindseymayer@wustl.edu
      • Principal Investigator: James Randall, MD
  • Pennsylvania
    • Philadelphia, Pennsylvania, United States, 19111
      • Active, not recruiting
      • Fox Chase Cancer Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Patient has NCCN low or intermediate risk prostate cancer that is biopsy proven.
2. Prostate volume is ≤80cc as assessed by MRI prior to radiotherapy.
3. AUA/IPSS score is ≤ 15.
4. ECOG performance status is ≤2 (or Karnofsky score is ≥60%).
5. Patient has no PIRADS 4 or 5 lesion on prostate MRI contacting the urethra (determined at physician discretion).
6. Patient has the ability to complete required patient questionnaires.
7. Patient age ≥ 18 years (or greater than the local age of majority).
8. Patient has the ability to understand and the willingness to sign a written informed consent document.

Exclusion Criteria:

1. Patient has baseline grade ≥3 GI or GU toxicity
2. Patient has had prior overlapping pelvic radiotherapy.
3. Patient has had prior transurethral resection of the prostate, prostate HIFU, or cryoablation.
4. Patient has node positive prostate cancer.
5. Patient has extracapsular extension (capsular abutment is permitted).
6. Patient has active inflammatory bowel disease or active collagen vascular disease.
7. Patient cannot undergo prostate MRI.
8. Patient cannot undergo prostate fiducial marker placement.
9. Patient has ongoing receipt of cytotoxic chemotherapy (androgen deprivation therapy is allowed).

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Adaptive SBRT with Urethral Sparing; Daily adaptive stereotactic body radiation therapy delivering 40 Gy in 5 fractions to the prostate while delivery 35-36 Gy in 5 fractions to the urethra.	Device: Daily adaptive SBRT with urethral sparing; The radiation plan for each daily fraction is adapted from the initial plan based on cone beam CT imaging acquired while the participant is laying on the treatment machine.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Patient-reported acute urinary toxicity	Minimum clinically important change (MCIC) status in patient-reported urinary QOL, as determined by the worst change reported by each subject in their EPIC-26 urinary domain scores.	90 days after end of SBRT

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Freedom from biochemical recurrence	Rate of biochemical recurrence free survival, as determined by the Phoenix definition (PSA level of 2 ng/ml or more higher than the lowest post-SBRT value)	5 years after end of SBRT
Patient-reported quality of life issues related to prostate cancer.	Patient-reported quality of life changes during and after adaptive prostate SBRT treatment using the Expanded Prostate Cancer Index Composite Short Form (EPIC-26) questionnaire.	Baseline; during treatment; 6 weeks, 3 months, 6 months, 12 months, 18 months, 2 years, 3 years, 4 years, and 5 years after end of SBRT
Patient-reported erectile dysfunction symptoms	Patient-reported erectile dysfunction symptoms before, during and after adaptive prostate SBRT treatment using the Sexual Health Inventory for Men (SHIM) questionnaire.	Baseline; during treatment; 6 weeks, 3 months, 6 months, 12 months, 18 months, 2 years, 3 years, 4 years, and 5 years after end of SBRT
Patient-reported urinary symptoms	Patient-reported urinary symptoms before, during and after adaptive prostate SBRT treatment using the International Prostate Symptom Score (IPSS) questionnaire.	Baseline; during treatment; 6 weeks, 3 months, 6 months, 12 months, 18 months, 2 years, 3 years, 4 years, and 5 years after end of SBRT
Patient-reported overall quality of life	Patient-reported overall quality of life before, during and after adaptive prostate SBRT treatment using the EQ-5D-5L questionnaire.	Baseline; during treatment; 6 weeks, 3 months, 6 months, 12 months, 18 months, 2 years, 3 years, 4 years, and 5 years after end of SBRT
Physician-reported toxicities	Physician-reported CTCAE v 5.0 adverse events	During treatment; 6 weeks, 3 months, 6 months, 12 months, 18 months, 2 years, 3 years, 4 years, and 5 years after end of SBRT
Alpha-blocker medication use	Change in use of alpha-blocker medications for urinary symptoms	Baseline; during treatment; 6 weeks, 3 months, 6 months, 12 months, 18 months, 2 years, 3 years, 4 years, and 5 years after end of SBRT
Metastasis-free survival	Metastasis-free survival	5 years after end of SBRT
Prostate-cancer specific mortality	Prostate-cancer specific mortality	5 years after end of SBRT
Overall survival	Overall survival	5 years after end of SBRT
Workflow metrics of adaptive SBRT for prostate cancer	Includes the time on table and frequency of using the adapted vs. non-adapted treatment plan for each fraction.	2 weeks after start of SBRT
Target and OAR dosimetry	Improvement in target coverage and/or reduction in dose to critical organs at risk in the adapted plan compared to the non-adaptive planned dosimetry	2 weeks after start of SBRT
Impact of rectal spacers	Physician reported toxicity and patient reported outcomes with or without implanted resorbable rectal spacer	Enrollment through 5 year follow up

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
Decipher prognostic ability	Correlation of the Decipher risk category (low/intermediate/high) with biochemical recurrence.	5 years after end of SBRT

Collaborators and Investigators

• Sponsor: Varian, a Siemens Healthineers Company
• Investigators: Principal Investigator: Jeremy Bredfeldt, PhD, Brigham and Women's Hospital; Principal Investigator: Jonathan Leeman, MD, Brigham and Women's Hospital

Study record dates

Study Major Dates

• Study Start (Actual): April 13, 2023
• Primary Completion (Estimated): July 1, 2026
• Study Completion (Estimated): July 1, 2031

Study Registration Dates

• First Submitted: March 10, 2023
• First Submitted That Met QC Criteria: March 26, 2023
• First Posted (Actual): April 7, 2023

Study Record Updates

• Last Update Posted (Actual): May 28, 2026
• Last Update Submitted That Met QC Criteria: May 27, 2026
• Last Verified: May 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Urogenital Diseases; Genital Diseases; Genital Neoplasms, Male; Urogenital Neoplasms; Neoplasms by Site; Neoplasms; Genital Diseases, Male; Prostatic Diseases; Male Urogenital Diseases; Prostatic Neoplasms
• Other Study ID Numbers: VAR-2021-10

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: Yes
• product manufactured in and exported from the U.S.: No