Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Radiotherapy: early-phase trial registry
2 of 5 indexed Radiotherapy trials are currently recruiting, with more weight in Phase 1-2.
Corpus placement: #3,391 of 28,707 conditions by registered trial count.
5 US clinical trials · 2 currently recruiting · #3,391 of 28,707 conditions by registered trial count
Radiotherapy: 5 US clinical trials tracked, 2 recruiting.
Radiotherapy is the subject of 5 registered US clinical trials on ClinicalTrials.gov, 2 of them currently open to new participants. 0 are in Phase 3-4 (later-stage) and 2 in Phase 1-2 (earlier-stage). The most active sponsor is Nanobiotix, running 1 of these trials.
Enrollment posture brief
Registry condition radiotherapy
OPEN 2 | RECR 40% | LATE 0 | EARLY 2 | RANK #3391 | SPON 1
Volume-matched condition peers
Nearest open-share peer: Achondroplasia (40% recruiting · 10 trials)
Radiotherapy lists 2 open slots (40% of 5 indexed trials). Peers are matched on registered volume, not therapeutic-area browse lists. How peer matching works →
Key findings
What ClinicalTrials.gov does not surface for Radiotherapy on its own pages , computed from the registry mirror as of 2026-08-08. Each line carries its own denominator so it can be quoted as it stands.
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Radiotherapy is recruiting below its size-band peers.
2 of 5 indexed trials (40%) are open to enrollment, against a 46.5% average across 27,806 conditions with fewer than 20 trials. The peer set uses the same ClinicalTrials.gov-derived counts as this page.
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One sponsor concentrates Radiotherapy research.
Nanobiotix accounts for 1 of 5 trials (20%). 5 distinct sponsors appear on at least one study for this condition label.
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Most Radiotherapy trials plan to enrol fewer than 100 people.
Median target enrolment is 60 among the 5 trials that report a genuine target (sentinel values excluded). 3 of those (60%) plan for fewer than 100 participants.
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Radiotherapy splits between interventional and observational designs.
3 interventional and 2 observational studies make up this index (60% interventional). Study type is sponsor-reported on ClinicalTrials.gov.
Open and recent trials
5 total, page 1 of 1
Serial MRI Scans During Radiation Therapy
Dana-Farber Cancer Institute
NCT04188535
Thoracic Radiotherapy for Patients With Metastatic (Stage IV) Non-Small Cell Lung Cancer at High Risk of Symptomatic Progression Within the Thorax
University of Rochester
NCT06262321
NBTXR3 Activated by Radiotherapy for Patients With Advanced Cancers Treated With An Anti-PD-1 Therapy
Nanobiotix
NCT03589339
ATM Variants in Radiotherapy Patients
University of Wisconsin, Madison
NCT00214227
T2* MRI Analysis for Sarcoma
Bryan Allen
NCT03658343
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 1 | 1 |
| Phase 2 | 1 |
Top Sponsors
Named interventions
Most-linked intervention names on Radiotherapy records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Radiotherapy trials. A trial with sites in several states counts in each.
Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.
Related
What to do with this Radiotherapy page
5 registered trials, 2 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 2 Radiotherapy trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- Nanobiotix sponsors the most Radiotherapy trials on record, review their full trial history before evaluating a specific study. See Nanobiotix's trials
- Bring the specific trial ID (NCT number) to your own doctor before enrolling, this page is a directory, not medical guidance. Read the trial-finding guide
Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.
Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This Radiotherapy condition card totals 5 registered trials; most-linked intervention T2* Imaging; top US site state New York. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.