{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Radiation+Therapy+to+partial+breast&page=2",
    "query": {
      "intervention": "Radiation Therapy to partial breast",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 64,
    "total_pages": 7,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Radiation+Therapy+to+partial+breast&page=3&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Radiation+Therapy+to+partial+breast&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-04T00:43:39.431Z",
  "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": "NCT05313191",
      "title": "Prospective Evaluation of Pencil Beam Scanning Proton Therapy for Previously Irradiated Tumors",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "CNS Cancer",
        "Head and Neck Cancer",
        "GI Cancer",
        "Gynecologic Cancer",
        "Prostate Cancer",
        "Thoracic Cancer",
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Pencil Beam Scanning Proton Therapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "RADIATION"
      ],
      "sponsor": "The New York Proton Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1800,
      "start_date": "2022-01-24",
      "completion_date": "2028-01",
      "has_results": false,
      "last_update_posted_date": "2026-04-13",
      "last_synced_at": "2026-10-04T00:43:39.431Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05313191"
    },
    {
      "nct_id": "NCT02755896",
      "title": "Trial to Compare Radiation Fibrosis With Five Versus Three Fractions",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Malignant Neoplasm of Breast Stage I"
      ],
      "interventions": [
        {
          "name": "Arm 1 600 cGY x 5 fractions",
          "type": "RADIATION"
        },
        {
          "name": "Arm 2 800 cGY x 3 fractions",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "RADIATION"
      ],
      "sponsor": "Weill Medical College of Cornell University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": "90 Years",
        "sex": "FEMALE",
        "summary": "50 Years to 90 Years · Female only"
      },
      "enrollment_count": 350,
      "start_date": "2015-10-14",
      "completion_date": "2027-12",
      "has_results": false,
      "last_update_posted_date": "2025-12-15",
      "last_synced_at": "2026-10-04T00:43:39.431Z",
      "location_count": 4,
      "location_summary": "Los Angeles, California • New York, New York",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02755896"
    },
    {
      "nct_id": "NCT04985032",
      "title": "Accelerated Partial Breast Irradiation (APBI) Using Stereotactic Body Radiation Therapy (SBRT)",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Ductal Carcinoma in Situ",
        "Invasive Ductal Carcinoma of Female Breast"
      ],
      "interventions": [
        {
          "name": "stereotactic body radiation therapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "RADIATION"
      ],
      "sponsor": "RPCR, Inc.",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": "100 Years",
        "sex": "FEMALE",
        "summary": "50 Years to 100 Years · Female only"
      },
      "enrollment_count": 200,
      "start_date": "2022-08-15",
      "completion_date": "2027-06",
      "has_results": false,
      "last_update_posted_date": "2022-08-05",
      "last_synced_at": "2026-10-04T00:43:39.431Z",
      "location_count": 2,
      "location_summary": "Stuart, Florida • Tampa, Florida",
      "locations": [
        {
          "city": "Stuart",
          "state": "Florida"
        },
        {
          "city": "Tampa",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04985032"
    },
    {
      "nct_id": "NCT02526498",
      "title": "Accelerated Partial Breast Radiation Therapy Using High-Dose Rate Brachytherapy in Treating Patients With Early Stage Breast Cancer After Surgery",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Ductal Breast Carcinoma In Situ",
        "Estrogen Receptor Positive",
        "Invasive Breast Carcinoma",
        "Progesterone Receptor Positive",
        "Stage IA Breast Cancer",
        "Stage IB Breast Cancer",
        "Stage IIA Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Accelerated Partial Breast Irradiation",
          "type": "RADIATION"
        },
        {
          "name": "High-Dose Rate Brachytherapy",
          "type": "RADIATION"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "RADIATION",
        "OTHER"
      ],
      "sponsor": "Rutgers, The State University of New Jersey",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "45 Years and older · Female only"
      },
      "enrollment_count": 200,
      "start_date": "2015-07-15",
      "completion_date": "2021-03-31",
      "has_results": true,
      "last_update_posted_date": "2023-05-15",
      "last_synced_at": "2026-10-04T00:43:39.431Z",
      "location_count": 10,
      "location_summary": "Gilbert, Arizona • La Jolla, California • Royal Oak, Michigan + 6 more",
      "locations": [
        {
          "city": "Gilbert",
          "state": "Arizona"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Royal Oak",
          "state": "Michigan"
        },
        {
          "city": "New Brunswick",
          "state": "New Jersey"
        },
        {
          "city": "New Brunswick",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02526498"
    },
    {
      "nct_id": "NCT03936478",
      "title": "Real-Time MRI-Guided 3-Fraction Accelerated Partial Breast Irradiation in Early Breast Cancer",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Breast Cancer",
        "DCIS",
        "LCIS"
      ],
      "interventions": [
        {
          "name": "MRIdian Radiation Treatment Unit",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "RADIATION"
      ],
      "sponsor": "University of Wisconsin, Madison",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "40 Years and older · Female only"
      },
      "enrollment_count": 30,
      "start_date": "2022-05-16",
      "completion_date": "2031-01",
      "has_results": false,
      "last_update_posted_date": "2026-06-11",
      "last_synced_at": "2026-10-04T00:43:39.431Z",
      "location_count": 1,
      "location_summary": "Madison, Wisconsin",
      "locations": [
        {
          "city": "Madison",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03936478"
    },
    {
      "nct_id": "NCT01618357",
      "title": "Pre-Operative Radiation and Veliparib for Breast Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Radiation",
          "type": "RADIATION"
        },
        {
          "name": "Lumpectomy/Mastectomy",
          "type": "PROCEDURE"
        },
        {
          "name": "Veliparib",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "RADIATION",
        "PROCEDURE",
        "DRUG"
      ],
      "sponsor": "Richard Zellars",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 19,
      "start_date": "2013-07-22",
      "completion_date": "2023-10-17",
      "has_results": false,
      "last_update_posted_date": "2024-05-22",
      "last_synced_at": "2026-10-04T00:43:39.431Z",
      "location_count": 6,
      "location_summary": "Avon, Indiana • Carmel, Indiana • Indianapolis, Indiana",
      "locations": [
        {
          "city": "Avon",
          "state": "Indiana"
        },
        {
          "city": "Carmel",
          "state": "Indiana"
        },
        {
          "city": "Indianapolis",
          "state": "Indiana"
        },
        {
          "city": "Indianapolis",
          "state": "Indiana"
        },
        {
          "city": "Indianapolis",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01618357"
    },
    {
      "nct_id": "NCT00882596",
      "title": "Use of the Contura™ Catheter to Deliver Accelerated Partial Breast Irradiation to \"Low-risk\" Breast Cancer Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Accelerated partial breast irradiation",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Cancer Center of Irvine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "50 Years and older · Female only"
      },
      "enrollment_count": 30,
      "start_date": "2008-05",
      "completion_date": "2013-07",
      "has_results": false,
      "last_update_posted_date": "2018-01-25",
      "last_synced_at": "2026-10-04T00:43:39.431Z",
      "location_count": 1,
      "location_summary": "Irvine, California",
      "locations": [
        {
          "city": "Irvine",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00882596"
    },
    {
      "nct_id": "NCT04852887",
      "title": "De-Escalation of Breast Radiation Trial for Hormone Sensitive, HER-2 Negative, Oncotype Recurrence Score Less Than or Equal to 18 Breast Cancer (DEBRA)",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Stage I Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Radiation and Endocrine Therapy (Tamoxifen, Anastrozol, Letrozole, Exemestane)",
          "type": "OTHER"
        },
        {
          "name": "Endocrine Therapy (Tamoxifen, Anastrozol, Letrozole, Exemestane)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "OTHER",
        "DRUG"
      ],
      "sponsor": "NRG Oncology",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "50 Years to 70 Years"
      },
      "enrollment_count": 1670,
      "start_date": "2021-06-23",
      "completion_date": "2041-07",
      "has_results": false,
      "last_update_posted_date": "2026-04-23",
      "last_synced_at": "2026-10-04T00:43:39.431Z",
      "location_count": 812,
      "location_summary": "Birmingham, Alabama • Mobile, Alabama • Kingman, Arizona + 553 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Kingman",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04852887"
    },
    {
      "nct_id": "NCT01310530",
      "title": "Partial Breast Proton Therapy for Early Stage Breast Cancer",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Proton Beam Radiotherapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "RADIATION"
      ],
      "sponsor": "Loma Linda University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": "80 Years",
        "sex": "FEMALE",
        "summary": "40 Years to 80 Years · Female only"
      },
      "enrollment_count": 150,
      "start_date": "2011-05-04",
      "completion_date": "2026-12",
      "has_results": false,
      "last_update_posted_date": "2026-02-04",
      "last_synced_at": "2026-10-04T00:43:39.431Z",
      "location_count": 2,
      "location_summary": "Loma Linda, California",
      "locations": [
        {
          "city": "Loma Linda",
          "state": "California"
        },
        {
          "city": "Loma Linda",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01310530"
    },
    {
      "nct_id": "NCT04603209",
      "title": "Registry for Intra-Operative Radiotherapy During Breast Conserving Surgery in Patients With Early Stage Breast Cancer",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Early-stage Breast Cancer",
        "Breast Carcinoma in Situ",
        "Breast Neoplasms"
      ],
      "interventions": [
        {
          "name": "Intraoperative Radiation Therapy (IORT)",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "RADIATION"
      ],
      "sponsor": "Saint John's Cancer Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1000,
      "start_date": "2018-10-03",
      "completion_date": "2028-10-03",
      "has_results": false,
      "last_update_posted_date": "2024-04-16",
      "last_synced_at": "2026-10-04T00:43:39.431Z",
      "location_count": 1,
      "location_summary": "Santa Monica, California",
      "locations": [
        {
          "city": "Santa Monica",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04603209"
    }
  ]
}