{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1360021391884280576.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1088/1748-0221/18/12/t12005"}},{"identifier":{"@type":"URI","@value":"https://iopscience.iop.org/article/10.1088/1748-0221/18/12/T12005"}},{"identifier":{"@type":"URI","@value":"https://iopscience.iop.org/article/10.1088/1748-0221/18/12/T12005/pdf"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Optimization of a YAP(Ce) prompt X-ray camera for imaging with spot scanning proton beams at clinical dose levels"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title>\n               <jats:p>Prompt secondary electron bremsstrahlung X-ray (prompt\n  X-ray) imaging using a low-energy X-ray camera is a promising method\n  for observing the beam shape from outside a subject. However, it has\n  sometimes been necessary to conduct such imaging at a higher dose\n  than the clinical level to acquire images with acceptable\n  quality. To solve this problem, we optimized a prompt X-ray imaging\n  system to use for spot scanning proton therapy system. The new\n  camera had more than one order higher sensitivity to image several\n  types of beams, including those at the clinical dose level. The\n  optimized prompt X-ray imaging system uses a 4 mm diameter pinhole\n  collimator to increase sensitivity, and it is combined with a larger\n  YAP(Ce) scintillator to increase the magnification ratio and thus\n  improve spatial resolution. We used a list-mode data-acquisition\n  system with high count rate capability. Prompt X-ray images were\n  acquired by irradiating a water phantom with proton beams from the\n  spot scanning proton therapy system. Measurements were taken for\n  pencil beams, spread-out Bragg peak (SOBP) beams, and a beam\n  utilized in actual clinical therapy. For all of the beams, we could\n  measure scanning spot images within a spill and evaluate the ranges\n  for the accumulated images at the clinical dose level. From the\n  list-mode data, we measured the temporarily altered positions of the\n  scanning beams as well as the accumulations of the prompt X-ray\n  images. The optimized prompt X-ray imaging system could improve\n  sensitivity while maintaining better spatial resolution. The new\n  system realized prompt X-ray imaging at the clinical dose level and\n  holds promise for future clinical imaging of prompt X-rays.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380021391884280451","@type":"Researcher","foaf:name":[{"@value":"Seiichi Yamamoto"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021391884280577","@type":"Researcher","foaf:name":[{"@value":"Tomohiro Yamashita"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021391884280449","@type":"Researcher","foaf:name":[{"@value":"Yusuke Kobashi"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021391884280578","@type":"Researcher","foaf:name":[{"@value":"Takuya Yabe"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021391884280452","@type":"Researcher","foaf:name":[{"@value":"Takashi Akagi"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021391884280450","@type":"Researcher","foaf:name":[{"@value":"Mitsutaka Yamaguchi"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021391884280579","@type":"Researcher","foaf:name":[{"@value":"Naoki Kawachi"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021391884280453","@type":"Researcher","foaf:name":[{"@value":"Kei Kamada"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021391884280448","@type":"Researcher","foaf:name":[{"@value":"Akira Yoshikawa"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021391884280576","@type":"Researcher","foaf:name":[{"@value":"Jun Kataoka"}]}],"publication":{"publicationIdentifier":[{"@type":"EISSN","@value":"17480221"}],"prism:publicationName":[{"@value":"Journal of Instrumentation"}],"dc:publisher":[{"@value":"IOP 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threshold"}]},{"@id":"https://cir.nii.ac.jp/crid/1040862776835096704","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"23K28462"},{"@type":"JGN","@value":"JP23K28462"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23K28462/"}],"notation":[{"@language":"ja","@value":"粒子線がん治療中にリアルタイムでCT撮像を行う新手法"},{"@language":"en","@value":"New method for real-time CT imaging during particle cancer therapy"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360004234397466496","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Beam range estimation by measuring bremsstrahlung"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004234427443584","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Imaging of monochromatic beams by measuring secondary electron bremsstrahlung for carbon-ion therapy using a pinhole x-ray 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