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NCT06825091RecruitingPhase 3

Is Adaptive SBRT for Prostate vs Image-guided Radiotherapy a True Evolution (ASPIRE)

Source: ClinicalTrials.gov · Last updated 2 Jun 2026

Brief summary (registry, in English)

The ASPIRE study is a Phase III randomized, single-center study designed to evaluate whether adaptive stereotactic body radiotherapy (SBRT) offers superior clinical benefits compared to standard image-guided SBRT for patients with localized prostate cancer. It aims to explore whether adaptive SBRT can improve urinary outcomes while maintaining effective cancer control. This interventional study is randomized, single-institution, and includes 320 participants with localized prostate cancer. Patients will be stratified based on fractionation schedules (5 vs. 7 fractions), use of rectal spacers, androgen deprivation therapy (ADT), and baseline alpha receptor antagonist use. Participants will be randomized to receive either adaptive SBRT or standard image-guided SBRT, with both arms adhering to established dosing protocols. Inclusion criteria includes an age greater than 18 years, diagnosed with localized prostate adenocarcinoma, and an ECOG performance status of 0-1, Eligible for prostate SBRT. The exclusion criteria includes patients who plan for elective nodal irradiation and contraindications to radiotherapy or MRI (for MR-Linac patients).

Status (registry)
Recruiting
Phase (registry)
Phase 3
Study type
Interventional
Enrollment
320 (estimated)
First submitted
26 Jan 2025
Start date
4 Feb 2025
Primary completion date
4 Feb 2030
Lead sponsor
University Health Network, Toronto
NCT number
NCT06825091

What you commit to

  • Study type: Interventional · Phase 3
  • Planned participants: 320
  • From 4 Feb 2025 to the primary completion date, 4 Feb 2030
  • 1 site in 1 country
  • Visits and tests: ask the trial team, the registry does not list them

Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.

Who cannot take part

Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.

Prior treatment

  • Planned for elective nodal irradiation
  • Contraindications to radiotherapy

Other

  • Patients with bilateral hip replacements, as they are ineligible for adaptive treatments at present time (either MR-guided or CT-guided)

Who the study is looking for

  • Age \>18 years
  • Histologic diagnosis of prostate adenocarcinoma
  • Localized prostate cancer
  • Low risk, intermediate risk, or high risk allowed
  • Patient planned for prostate SBRT

Age in the registry: 18 years to - · Sex: Male · Does not accept healthy volunteers

Full criteria on ClinicalTrials.gov

Sites (1)

Sites in registry order. Pick your city on the disease page to sort them by distance.

SiteCityCountrySite status
Princess Margaret Cancer Center
Coordinator of this site? Confirm its status
TorontoCanadaRecruiting

This page is information, not medical advice. Discuss any trial with your doctor.