{
  "abstract": "Introduction: A dosimetric performance analysis of microDiamond (MD) detector in magnetic resonance imaging linear accelerators (MR-Linac) was performed to evaluate its utility for patient-specific quality assurance (PSQA) in stereotactic radiotherapy (SRT). Methods: Output factors (OFs), depth dose curves, and dose profiles for field sizes from 1 cm × 1 cm to 10 cm × 10 cm were measured in an Elekta Unity 1.5 T MR-Linac. Measurements were conducted using an MR-Safe three-dimensional (3D) water phantom with a PTW Semiflex 3D ionization chamber and a PTW MD detector. Angular response was assessed for orientations perpendicular to the beam and parallel to the magnetic field; correction factors were determined for gantry angles from 0° to 360° in 20° increments. Detectors were cross-calibrated against a 0.6 cc Farmer chamber, and patient-specific point-dose verification was performed for SRT plans. Results: Average dmax measured with the MD detector (1.28 ± 0.1 cm) agreed closely with the Semiflex 3D (1.27 ± 0.1 cm). The Semiflex 3D overestimated penumbra by 1.8 ± 0.6 mm and underestimated small-field OFs, while the MD detector showed slight overresponse (0.5%). The angular dependence remains substantial and highly sensitive to field size, requiring field-size-specific angular correction factors to achieve clinical accuracy better than 2%. After cross-calibration, the difference between the measured and planned doses for the 1.2 cc target was − 6.92% for Semiflex 3D and 1.36% for MD detector. Conclusion: The MD detector was successfully validated for MR-Linac. Asymmetric angular dependence due to the Lorentz force was confirmed, necessitating gantry angle-specific corrections for dose estimation. The MD detector demonstrated superior accuracy for small-field SRT targets, confirming its significance for precise PSQA.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 5,
  "authors": [
    {
      "name": "Sanjana Choudhary"
    },
    {
      "name": "Chithra Krishnamoorthy"
    },
    {
      "name": "Radhakrishnan B. Nair"
    },
    {
      "name": "S. D. Sharma"
    },
    {
      "name": "Vinayaka Shenoy"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1dbs8qc661nd8.bib",
  "cited_by": 0,
  "doi": "10.4103/jmp.jmp_123_26",
  "fulltext_url": "https://www.ovid.com/jnls/jomp/fulltext/10.4103/jmp.jmp_123_26~characterization-and-validation-of-microdiamond-detectors-in",
  "id": "1dbs8qc661nd8",
  "issns": [
    "0971-6203",
    "1998-3913"
  ],
  "landing_url": "https://doi.org/10.4103/jmp.jmp_123_26",
  "language": "en",
  "licence": "CC-BY-NC-SA",
  "licence_label": "CC BY-NC-SA",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by-nc-sa/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "lcc",
      "R895-920"
    ],
    [
      "openalex",
      "3108|Advanced Radiotherapy Techniques"
    ]
  ],
  "openalex": "W7214121906",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-07-01",
  "publisher": "Wolters Kluwer Medknow Publications",
  "ris": "https://research.draconitic.com/paper/1dbs8qc661nd8.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T13:43:53Z",
      "native_id": "41f6de3f2fdd42858e3d215526a897a4",
      "source": "doaj",
      "url": "https://doi.org/10.4103/jmp.jmp_123_26"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "openalex:3108|Advanced Radiotherapy Techniques",
      "subfield": "applied-instrumentation"
    }
  ],
  "title": "Characterization and Validation of MicroDiamond Detectors in Patient-specific Quality Assurance of Magnetic Resonance-guided Stereotactic Radiotherapy",
  "title_text": "Characterization and Validation of MicroDiamond Detectors in Patient-specific Quality Assurance of Magnetic Resonance-guided Stereotactic Radiotherapy",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T13:43:53Z",
  "url": "https://research.draconitic.com/paper/1dbs8qc661nd8",
  "venue": "Journal of Medical Physics",
  "versions": []
}