Holding your breath could make cancer radiation safer and stronger
NCT ID NCT07594691
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tests a new way to give radiation for abdominal cancer. By having patients hold their breath at different points (inhale and exhale) during treatment, doctors aim to deliver a higher dose to the tumor while protecting nearby healthy organs. The study will enroll 15 adults whose tumors are close to sensitive organs. The goal is to see if this technique improves treatment without increasing side effects.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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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
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About 15 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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May 2026
- Expected to finish
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Jan 2028
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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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 Hide 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: * Age ≥ 18 * Any patient undergoing radiation therapy for a cancer lesion in the abdomen in close proximity to OARs that is hypothesized to have differential displacement on inhale and exhale breath hold CT scans of the OAR relative to the tumor. * Patients need at least 3 fractions of RT * Critical OARs are within 2 cm of luminal GI structures, chest wall, or previous radiation fields * Able to receive and understand verbal and written information regarding study and able to give written informed consent Exclusion Criteria: * Inability to perform inhale or exhale breath holds during standard workflow CT simulation evaluation
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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
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Princess Margaret Cancer Centre Toronto, Ontario
RECRUITINGToronto, Ontario, M5G 2M9, Canada
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