Clinical trial Recruiting at 1 site Interventional Ages 18 and up

Using proton therapy to treat small cell lung cancer

Official title: RAD4649-19: Prospective Study of Intensity-Modulated Proton Therapy (IMPT) for Small Cell Lung Cancer

Run by Emory University · NCT04342429 · Data updated 2026-11-12

This study tests whether a new type of radiation therapy called proton therapy is safer and more effective for people with small cell lung cancer compared to standard treatments.

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment30 (estimated)
SponsorEmory University
Academic / other
Drugs / interventionsradiation
Locations1 site (Atlanta, Georgia)
StatusRecruiting
StartedMarch 19, 2020
Main results expectedMay 27, 2027
Study endsMay 27, 2028
Registry record updatedSeptember 17, 2026
Trial IDNCT04342429 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include adults aged 18 or older with pathologically confirmed small cell lung cancer who are recommended for thoracic radiotherapy using IMPT.

Probably not a fit

Patients with prior radiation therapy that overlaps significantly with the planned treatment area or those who are pregnant may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study evaluates the safety and effectiveness of intensity-modulated proton therapy (IMPT) for patients with small cell lung cancer (SCLC). It aims to identify the best imaging schedule and re-planning strategies for patients whose tumors change rapidly. Additionally, the study will compare the rates of cardiac toxicities, pneumonitis, and esophagitis in patients receiving IMPT versus those treated with traditional photon-based therapies.

Why it matters

Potential benefit: If successful, this approach could lead to safer and more effective treatment options for patients with small cell lung cancer.

How similar studies have gone: While there is ongoing research into proton therapy for various cancers, this specific approach for small cell lung cancer is relatively novel and has not been extensively tested.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Pathologically confirmed small cell lung cancer, limited or extensive stage.
* Patients who are offered thoracic radiotherapy with intensity-modulated proton therapy (IMPT) techniques delivering 30-66 Gy in 15-33 fractions at 2 Gy per fraction, at the recommendation of the treating radiation oncologist.
* Age 18 or greater

Exclusion Criteria:

* Prior radiation therapy which would provide significant dose overlap with the planned target volume(s)
* Pregnancy

Where it's running

  • Winship Cancer Institute
    Atlanta, Georgia, United States
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.