{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,5]],"date-time":"2026-09-05T19:32:33Z","timestamp":1788636753104,"version":"build-2803163510"},"reference-count":18,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"3","license":[{"start":{"date-parts":[[2025,7,1]],"date-time":"2025-07-01T00:00:00Z","timestamp":1751328000000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-sa\/4.0"}],"content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2025,7]]},"abstract":"<jats:sec>\n                    <jats:title>Purpose:<\/jats:title>\n                    <jats:p>Patient-specific quality assurance (QA) for CyberKnife is typically performed using micro ionization chambers and film dosimetry. However, micro ionization chambers tend to underestimate dose measurements in small radiation fields. Therefore, scintillation detectors, with their small detector size, may be more suitable for point dosimetry in CyberKnife QA. The purpose of this study was to evaluate the utility of a scintillation detector (Exradin W2 [W2]) for point dose measurements in CyberKnife patient-specific QA.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>Dosimetric measurements for 50 treatment plans involving intracranial stereotactic radiotherapy were performed using both the W2 and a micro ionization chamber (Exradin A16 [A16]).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>The mean point dose differences in patient-specific QA were 0.5% for W2 and -6.6% for A16; dose differences with W2 were generally within \u00b13%. Factors contributing to measurement robustness included the optical fiber dose for W2, and the static cable dose and collimator size for A16.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.4103\/jmp.jmp_141_25","type":"journal-article","created":{"date-parts":[[2025,9,29]],"date-time":"2025-09-29T12:00:18Z","timestamp":1759147218000},"page":"457-462","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":1,"title":["Point Dosimetry in Patient-specific Quality Assurance of a Robotic Radiosurgery System Using a Scintillation Detector"],"prefix":"10.4103","volume":"50","author":[{"given":"Kohei","family":"Okawa","sequence":"first","affiliation":[{"name":"Faculty of Health Sciences, Butsuryo College of Osaka, Sakai, Japan"},{"name":"Department of Radiology, Yokohama CyberKnife Center, Yokohama, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoshifumi","family":"Hirota","sequence":"additional","affiliation":[{"name":"Department of Radiology, Kamiyacho Neurosurgical Clinic, Tokyo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","published-online":{"date-parts":[[2025,9,29]]},"reference":[{"key":"R1-20260420","doi-asserted-by":"crossref","first-page":"124","DOI":"10.1159\/000099863","article-title":"The Cyberknife: A frameless robotic system for radiosurgery","volume":"69","author":"Adler","year":"1997","journal-title":"Stereotact Funct Neurosurg"},{"key":"R2-20260420","doi-asserted-by":"crossref","first-page":"4565","DOI":"10.1118\/1.4955437","article-title":"Validation of a pretreatment delivery quality assurance method for the CyberKnife synchrony system","volume":"43","author":"Mastella","year":"2016","journal-title":"Med Phys"},{"key":"R3-20260420","doi-asserted-by":"crossref","first-page":"378","DOI":"10.1093\/jrr\/rrw103","article-title":"A robust measurement point for dose verification in delivery quality assurance for a robotic radiosurgery system","volume":"58","author":"Kurosu","year":"2017","journal-title":"J Radiat Res"},{"key":"R4-20260420","doi-asserted-by":"crossref","first-page":"50","DOI":"10.1016\/j.ejmp.2017.06.016","article-title":"Plan delivery quality assurance for CyberKnife: Statistical process control analysis of 350 film-based patient-specific QAs","volume":"39","author":"Bellec","year":"2017","journal-title":"Phys Med"},{"key":"R5-20260420","first-page":"179","article-title":"Patient-specific quality assurance for intracranial cases in robotic radiosurgery system","volume":"23","author":"Koksal","year":"2018","journal-title":"J BUON"},{"key":"R6-20260420","doi-asserted-by":"crossref","first-page":"53","DOI":"10.14316\/pmp.2018.29.2.53","article-title":"Practical implementation of patient-specific quality assurance for small and multiple brain tumors in CyberKnife with fixed collimators","volume":"29","author":"Lee","year":"2018","journal-title":"Prog Med Phys"},{"key":"R8-20260420","doi-asserted-by":"crossref","first-page":"2468","DOI":"10.1002\/mp.13501","article-title":"Characterization of the plastic scintillation detector Exradin W2 for small field dosimetry","volume":"46","author":"Galavis","year":"2019","journal-title":"Med Phys"},{"key":"R9-20260420","doi-asserted-by":"crossref","first-page":"4414","DOI":"10.1118\/1.4922656","article-title":"Comment on \u201cCharacterization of the Exradin W1 scintillator for use in radiotherapy","volume":"42","author":"Beierholm","year":"2015","journal-title":"\u201d Med Phys"},{"key":"R10-20260420","doi-asserted-by":"crossref","first-page":"6669","DOI":"10.1088\/0031-9155\/60\/17\/6669","article-title":"Application of the Exradin W1 scintillator to determine Ediode 60017 and microDiamond 60019 correction factors for relative dosimetry within small MV and FFF fields","volume":"60","author":"Underwood","year":"2015","journal-title":"Phys Med Biol"},{"key":"R11-20260420","doi-asserted-by":"crossref","first-page":"324","DOI":"10.1016\/j.zemedi.2016.11.001","article-title":"The practical application of scintillation dosimetry in small-field photon-beam radiotherapy","volume":"27","author":"Burke","year":"2017","journal-title":"Z Med Phys"},{"key":"R12-20260420","doi-asserted-by":"crossref","first-page":"373","DOI":"10.1016\/j.radphyschem.2017.02.023","article-title":"Characterisation of a plastic scintillation detector to be used in a multicentre stereotactic radiosurgery dosimetry audit","volume":"140","author":"Dimitriadis","year":"2017","journal-title":"Radiat Phys Chem"},{"key":"R13-20260420","doi-asserted-by":"crossref","first-page":"1364","DOI":"10.1002\/mp.14002","article-title":"High spatial resolution inorganic scintillator detector for high-energy X-ray beam at small field irradiation","volume":"47","author":"Debnath","year":"2020","journal-title":"Med Phys"},{"key":"R14-20260420","doi-asserted-by":"crossref","first-page":"115016","DOI":"10.1088\/1361-6560\/abffbb","article-title":"Miniaturized scintillator dosimeter for small field radiation therapy","volume":"66","author":"Gonod","year":"2021","journal-title":"Phys Med Biol"},{"key":"R15-20260420","doi-asserted-by":"crossref","first-page":"e13728","DOI":"10.1002\/acm2.13728","article-title":"Commissioning an Exradin W2 plastic scintillation detector for clinical use in small radiation fields","volume":"23","author":"Jacqmin","year":"2022","journal-title":"J Appl Clin Med Phys"},{"key":"R16-20260420","doi-asserted-by":"crossref","first-page":"5509","DOI":"10.1002\/mp.12471","article-title":"Evaluation of plastic scintillator detector for small stereotactic patient-speci c quality assurance","volume":"44","author":"Qin","year":"2017","journal-title":"Med Phys"},{"key":"R17-20260420","doi-asserted-by":"crossref","first-page":"106821","DOI":"10.1016\/j.radmeas.2022.106821","article-title":"Evaluation of calibration methods of Exradin W2 plastic scintillation detector for CyberKnife small-field dosimetry","volume":"156","author":"Okamura","year":"2022","journal-title":"Radiat Meas"},{"key":"R18-20260420","doi-asserted-by":"crossref","first-page":"1177","DOI":"10.1007\/s13246-024-01438-5","article-title":"Evaluation of output factors of different radiotherapy planning systems using Exradin W2 plastic scintillator detector","volume":"47","author":"Ando","year":"2024","journal-title":"Phys Eng Sci Med"},{"key":"R19-20260420","doi-asserted-by":"crossref","first-page":"15330338211036542","DOI":"10.1177\/15330338211036542","article-title":"Quality assurance for small-field VMAT SRS and conventional-field IMRT using the Exradin W1 scintillator","volume":"20","author":"Huang","year":"2018","journal-title":"Technol Cancer Res Treat"}],"container-title":["Journal of Medical Physics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.ovid.com\/10.4103\/jmp.jmp_141_25","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,13]],"date-time":"2026-08-13T18:55:47Z","timestamp":1786647347000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.ovid.com\/10.4103\/jmp.jmp_141_25"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,7]]},"references-count":18,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2025]]}},"URL":"https:\/\/doi.org\/10.4103\/jmp.jmp_141_25","relation":{},"ISSN":["0971-6203","1998-3913"],"issn-type":[{"value":"0971-6203","type":"print"},{"value":"1998-3913","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,7]]},"assertion":[{"value":"2025-05-30","name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2025-07-21","name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}}]}}