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GPS-Guided prostate radiation: could 3 doses be better than 5?

NCT ID NCT06117059

Disease control Sponsor: NHS Lothian Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study is testing whether giving only 3 doses of high-precision radiation (SBRT) over 3 days is as safe and effective as the usual 5-dose schedule for men with low or intermediate risk prostate cancer. The radiation is guided by a special catheter that acts like a GPS, tracking the prostate's position in real time to protect nearby organs. The goal is to reduce side effects and make treatment more convenient.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
radiation therapy (SBRT/SABR)
What this could lead to
If successful, this could offer a shorter, more convenient radiation schedule for early prostate cancer with fewer side effects.
What could go wrong
This is a small, early-phase study with only 100 participants. It is not yet proven that 3 doses are as safe or effective as the standard 5-dose regimen.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 100 people

The number the study aims to enrol. It can still change while the study runs.

Started

Nov 2024

Expected to finish

Nov 2027

An estimate. End dates often move.

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

Children (under 18), adults (18 to 64) and older adults (65 and over)

Sex

Male participants only

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * low and favorable intermediate NCCN Criteria patients * Prostate volume under 80cc * IPSS under 20 * Q-max above 10cc per second and urinary residual less than 150mls * No TURP * No hip replacements * No previous radiotherapy to the pelvis * No active second malignancy except skin SCC or BCC for the last 2 years * No history of inflammatory bowel disease * No co-morbid illness that would make compliance to treatment difficult * Able to give informed consent Exclusion Criteria: * T3a or above * Gleason 4+3=7 * PSA\>20ng/ml

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Conditions

The condition(s) this trial relates to.

prostate cancer prostate carcinoma

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Intermediate risk prostate cancer Localized prostate cancer Low risk prostate cancer

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • NHS Lothian

    RECRUITING

    Edinburgh, United Kingdom

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