{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=External+beam+radiation+%28standard%29&page=4",
    "query": {
      "intervention": "External beam radiation (standard)",
      "page": 4
    },
    "page_size": 10
  },
  "pagination": {
    "page": 4,
    "page_size": 10,
    "total_count": 135,
    "total_pages": 14,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=External+beam+radiation+%28standard%29&page=5&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=External+beam+radiation+%28standard%29&page=3&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-12T06:57:49.026Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT04634877",
      "title": "Study of Pembrolizumab (MK-3475) in Combination With Adjuvant Chemotherapy With or Without Radiotherapy in Participants With Newly Diagnosed Endometrial Cancer After Surgery With Curative Intent (MK-3475-B21 / KEYNOTE-B21 / ENGOT-en11 / GOG-3053)",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Endometrial Neoplasms"
      ],
      "interventions": [
        {
          "name": "Pembrolizumab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Carboplatin",
          "type": "DRUG"
        },
        {
          "name": "Paclitaxel",
          "type": "DRUG"
        },
        {
          "name": "Placebo for pembrolizumab",
          "type": "DRUG"
        },
        {
          "name": "Docetaxel",
          "type": "DRUG"
        },
        {
          "name": "Cisplatin",
          "type": "DRUG"
        },
        {
          "name": "External Beam Radiotherapy (EBRT)",
          "type": "RADIATION"
        },
        {
          "name": "Cisplatin (as radiosensitizer)",
          "type": "DRUG"
        },
        {
          "name": "Brachytherapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "DRUG",
        "RADIATION"
      ],
      "sponsor": "Merck Sharp & Dohme LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 990,
      "start_date": "2021-01-10",
      "completion_date": "2026-11-20",
      "has_results": false,
      "last_update_posted_date": "2026-09-18",
      "last_synced_at": "2026-10-12T06:57:49.026Z",
      "location_count": 29,
      "location_summary": "Birmingham, Alabama • Mobile, Alabama • Phoenix, Arizona + 26 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "La Jolla",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04634877"
    },
    {
      "nct_id": "NCT00352534",
      "title": "Vincristine, Dactinomycin, and Doxorubicin With or Without Radiation Therapy or Observation Only in Treating Younger Patients Who Are Undergoing Surgery for Newly Diagnosed Stage I, Stage II, or Stage III Wilms' Tumor",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Stage I Kidney Wilms Tumor",
        "Stage II Kidney Wilms Tumor",
        "Stage III Kidney Wilms Tumor"
      ],
      "interventions": [
        {
          "name": "3-Dimensional Conformal Radiation Therapy",
          "type": "RADIATION"
        },
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Chest Radiography",
          "type": "PROCEDURE"
        },
        {
          "name": "Computed Tomography",
          "type": "PROCEDURE"
        },
        {
          "name": "Dactinomycin",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Doxorubicin Hydrochloride",
          "type": "DRUG"
        },
        {
          "name": "Echocardiography Test",
          "type": "PROCEDURE"
        },
        {
          "name": "Magnetic Resonance Imaging",
          "type": "PROCEDURE"
        },
        {
          "name": "Therapeutic Conventional Surgery",
          "type": "PROCEDURE"
        },
        {
          "name": "Ultrasound Imaging",
          "type": "PROCEDURE"
        },
        {
          "name": "Vincristine Sulfate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "RADIATION",
        "PROCEDURE",
        "BIOLOGICAL",
        "DRUG"
      ],
      "sponsor": "Children's Oncology Group",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "29 Years",
        "sex": "ALL",
        "summary": "Up to 29 Years"
      },
      "enrollment_count": 808,
      "start_date": "2006-11-06",
      "completion_date": "2026-03-31",
      "has_results": true,
      "last_update_posted_date": "2026-06-03",
      "last_synced_at": "2026-10-12T06:57:49.026Z",
      "location_count": 210,
      "location_summary": "Birmingham, Alabama • Mobile, Alabama • Phoenix, Arizona + 150 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00352534"
    },
    {
      "nct_id": "NCT01507428",
      "title": "Positron Emission Tomography and Computed Tomography in Guiding Radiation Therapy for Stage III Non-small Cell Lung Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Stage III Lung Non-Small Cell Cancer AJCC v7",
        "Stage IIIA Lung Non-Small Cell Cancer AJCC v7",
        "Stage IIIB Lung Non-Small Cell Cancer AJCC v7"
      ],
      "interventions": [
        {
          "name": "18F-Fluoromisonidazole",
          "type": "DRUG"
        },
        {
          "name": "Carboplatin",
          "type": "DRUG"
        },
        {
          "name": "Computed Tomography",
          "type": "PROCEDURE"
        },
        {
          "name": "External Beam Radiation Therapy",
          "type": "RADIATION"
        },
        {
          "name": "Fludeoxyglucose F-18",
          "type": "DRUG"
        },
        {
          "name": "Image-Guided Adaptive Radiation Therapy",
          "type": "RADIATION"
        },
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        },
        {
          "name": "Paclitaxel",
          "type": "DRUG"
        },
        {
          "name": "Positron Emission Tomography",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE",
        "RADIATION",
        "OTHER"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 138,
      "start_date": "2012-02-22",
      "completion_date": "2022-05-20",
      "has_results": true,
      "last_update_posted_date": "2026-04-21",
      "last_synced_at": "2026-10-12T06:57:49.026Z",
      "location_count": 29,
      "location_summary": "Palo Alto, California • Augusta, Georgia • Chicago, Illinois + 23 more",
      "locations": [
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "Augusta",
          "state": "Georgia"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Indianapolis",
          "state": "Indiana"
        },
        {
          "city": "Louisville",
          "state": "Kentucky"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01507428"
    },
    {
      "nct_id": "NCT03051464",
      "title": "Randomizing Two Radiotherapy Boost Options to Avoid Rectal Cancer Surgery",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Stage II Rectal Cancer",
        "Organ Preservation",
        "Non-operative Treatment",
        "Rectal Cancer (Stage III)",
        "Rectal Cancer Patients"
      ],
      "interventions": [
        {
          "name": "Complete responders and Non-complete responders",
          "type": "PROCEDURE"
        },
        {
          "name": "Chemoradiation + EBRT Boost",
          "type": "RADIATION"
        },
        {
          "name": "Chemoradiation + HDRBT Boost",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "RADIATION"
      ],
      "sponsor": "Sir Mortimer B. Davis - Jewish General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 131,
      "start_date": "2017-04-25",
      "completion_date": "2030-01",
      "has_results": false,
      "last_update_posted_date": "2026-06-30",
      "last_synced_at": "2026-10-12T06:57:49.026Z",
      "location_count": 1,
      "location_summary": "Dallas, Texas",
      "locations": [
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03051464"
    },
    {
      "nct_id": "NCT01359592",
      "title": "S1001 PET-Directed Therapy in Treating Patients With Limited-Stage Diffuse Large B-Cell Lymphoma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Lymphoma"
      ],
      "interventions": [
        {
          "name": "rituximab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "cyclophosphamide",
          "type": "DRUG"
        },
        {
          "name": "doxorubicin hydrochloride",
          "type": "DRUG"
        },
        {
          "name": "prednisone",
          "type": "DRUG"
        },
        {
          "name": "vincristine sulfate",
          "type": "DRUG"
        },
        {
          "name": "R-CHOP regimen",
          "type": "OTHER"
        },
        {
          "name": "laboratory biomarker analysis",
          "type": "OTHER"
        },
        {
          "name": "fludeoxyglucose F 18",
          "type": "RADIATION"
        },
        {
          "name": "selective external radiation therapy",
          "type": "RADIATION"
        },
        {
          "name": "yttrium Y 90 ibritumomab tiuxetan",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "DRUG",
        "OTHER",
        "RADIATION"
      ],
      "sponsor": "SWOG Cancer Research Network",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 159,
      "start_date": "2011-09",
      "completion_date": "2023-12",
      "has_results": true,
      "last_update_posted_date": "2025-06-17",
      "last_synced_at": "2026-10-12T06:57:49.026Z",
      "location_count": 240,
      "location_summary": "Anchorage, Alaska • Tucson, Arizona • Aurora, Colorado + 153 more",
      "locations": [
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Boulder",
          "state": "Colorado"
        },
        {
          "city": "Colorado Springs",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01359592"
    },
    {
      "nct_id": "NCT03741673",
      "title": "Pre-operative SRS or Post-operative SRS in Treating Cancer Patients With Brain Metastases",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Malignant Neoplasm",
        "Metastatic Malignant Neoplasm in the Brain"
      ],
      "interventions": [
        {
          "name": "Quality-of-Life Assessment",
          "type": "OTHER"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        },
        {
          "name": "Stereotactic Radiosurgery",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "OTHER",
        "RADIATION"
      ],
      "sponsor": "M.D. Anderson Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 180,
      "start_date": "2018-11-08",
      "completion_date": "2027-01-31",
      "has_results": false,
      "last_update_posted_date": "2026-08-10",
      "last_synced_at": "2026-10-12T06:57:49.026Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03741673"
    },
    {
      "nct_id": "NCT07332000",
      "title": "A Biomarker Study in Men With Localized Prostate Cancer Treated With Aglatimagene Besadenovec",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Prostate Cancer Patients Treated by Radiotherapy",
        "Prostate Cancer (Adenocarcinoma)"
      ],
      "interventions": [
        {
          "name": "aglatimagene besadenovec + valacyclovir",
          "type": "BIOLOGICAL"
        },
        {
          "name": "External Beam Radiation Therapy (EBRT)",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "RADIATION"
      ],
      "sponsor": "Candel Therapeutics, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "18 Years and older · Male only"
      },
      "enrollment_count": 45,
      "start_date": "2025-10-30",
      "completion_date": "2027-02",
      "has_results": false,
      "last_update_posted_date": "2026-09-15",
      "last_synced_at": "2026-10-12T06:57:49.026Z",
      "location_count": 7,
      "location_summary": "Peoria, Arizona • Lakewood, Colorado • Littleton, Colorado + 4 more",
      "locations": [
        {
          "city": "Peoria",
          "state": "Arizona"
        },
        {
          "city": "Lakewood",
          "state": "Colorado"
        },
        {
          "city": "Littleton",
          "state": "Colorado"
        },
        {
          "city": "Towson",
          "state": "Maryland"
        },
        {
          "city": "Las Vegas",
          "state": "Nevada"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07332000"
    },
    {
      "nct_id": "NCT06997094",
      "title": "Decitabine in Combination With Standard of Care Therapy for the Treatment of Surgically Resectable HPV-Negative Head and Neck Cancer",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Human Papillomavirus-Negative Neck Squamous Cell Carcinoma",
        "Resectable Head and Neck Squamous Cell Carcinoma",
        "Resectable Human Papillomavirus-Independent Head and Neck Mucosal Squamous Cell Carcinoma",
        "HPV-Negative Squamous Cell Carcinoma",
        "Resectable Head and Neck Squamous-cell Carcinoma"
      ],
      "interventions": [
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Chemotherapy",
          "type": "DRUG"
        },
        {
          "name": "Decitabine",
          "type": "DRUG"
        },
        {
          "name": "External Beam Radiation Therapy",
          "type": "RADIATION"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        },
        {
          "name": "Surgical Procedure",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "DRUG",
        "RADIATION",
        "OTHER"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 32,
      "start_date": "2026-01-23",
      "completion_date": "2027-11-08",
      "has_results": false,
      "last_update_posted_date": "2026-07-15",
      "last_synced_at": "2026-10-12T06:57:49.026Z",
      "location_count": 1,
      "location_summary": "Jacksonville, Florida",
      "locations": [
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06997094"
    },
    {
      "nct_id": "NCT00186888",
      "title": "Study of Treatment for Patients With Cancer of the Eye -Retinoblastoma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Retinoblastoma",
        "Retinal Neoplasm"
      ],
      "interventions": [
        {
          "name": "Enucleation",
          "type": "PROCEDURE"
        },
        {
          "name": "Vincristine, Carboplatin",
          "type": "DRUG"
        },
        {
          "name": "Focal Therapies",
          "type": "PROCEDURE"
        },
        {
          "name": "External Beam Radiation",
          "type": "RADIATION"
        },
        {
          "name": "Vincristine and Topotecan",
          "type": "DRUG"
        },
        {
          "name": "Vincristine + Carboplatin + Etoposide",
          "type": "DRUG"
        },
        {
          "name": "vincristine, cyclophosphamide, and doxorubicin",
          "type": "DRUG"
        },
        {
          "name": "Vincristine, Carboplatin and Etoposide",
          "type": "DRUG"
        },
        {
          "name": "Periocular carboplatin",
          "type": "PROCEDURE"
        },
        {
          "name": "G-CSF",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "DRUG",
        "RADIATION",
        "OTHER"
      ],
      "sponsor": "St. Jude Children's Research Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 107,
      "start_date": "2005-04-07",
      "completion_date": "2024-11-12",
      "has_results": true,
      "last_update_posted_date": "2025-09-04",
      "last_synced_at": "2026-10-12T06:57:49.026Z",
      "location_count": 1,
      "location_summary": "Memphis, Tennessee",
      "locations": [
        {
          "city": "Memphis",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00186888"
    },
    {
      "nct_id": "NCT06391034",
      "title": "Magnetic Resonance (MR) Imaging With Hyperpolarized 13C-Pyruvate +/- 13C,15N-Urea in Patients With Prostate Cancer",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Prostate Cancer"
      ],
      "interventions": [
        {
          "name": "hyperpolarized pyruvate +/-urea (13C/15N)",
          "type": "DRUG"
        },
        {
          "name": "Non-investigational External beam radiotherapy (EBRT)",
          "type": "RADIATION"
        },
        {
          "name": "Radiotherapy (RT)",
          "type": "PROCEDURE"
        },
        {
          "name": "Multi-parametric magnetic resonance imaging (mpMRI)",
          "type": "PROCEDURE"
        },
        {
          "name": "Non-interventional hormone therapy",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Prostate Biopsy",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DRUG",
        "RADIATION",
        "PROCEDURE",
        "BIOLOGICAL"
      ],
      "sponsor": "Robert Bok, MD, PhD",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "18 Years and older · Male only"
      },
      "enrollment_count": 161,
      "start_date": "2024-09-24",
      "completion_date": "2032-10-31",
      "has_results": false,
      "last_update_posted_date": "2026-01-07",
      "last_synced_at": "2026-10-12T06:57:49.026Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06391034"
    }
  ]
}