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This study was\nperformed to investigate influence of image lag on the accuracy of target tracking in radiotherapy. Fluoroscopic images\nwere obtained using a direct type of dynamic flat-panel detector (FPD) system under conditions of target tracking during\nradiotherapy. The images continued to be read out after X-irradiations and cutoff, and image lag properties in the system\nwere then determined. Subsequently, a tungsten materials plate with a precision edge was mounted on to a motor control\ndevice, which provided a constant velocity. The plate was moved into the center of the detector at movement rate of 10\nand 20 mm/s, covering lung tumor movement of normal breathing, and MTF and profile curves were measured on the\nedges covering and uncovering the detector. A lung tumor with blurred edge due to image lag was simulated using the\nresults and then superimposed on breathing chest radiographs of a patient. The moving target with and without image lag\nwas traced using a template-matching technique. In the results, the target could be traced within a margin for error in\nexternal radiotherapy. The results indicated that there was no effect of image lag on target tracking in usual breathing\nspeed in a radiotherapy situation. Further studies are required to investigate influence by the other factors, such as\nexposure dose, target size and shape, imaging rate, and thickness of a patients body.", "subitem_description_type": "Abstract"}]}, "item_10003_source_id_9": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "0277-786X", "subitem_source_identifier_type": "ISSN"}]}, "item_access_right": {"attribute_name": "アクセス権", "attribute_value_mlt": [{"subitem_access_right": "metadata only access", "subitem_access_right_uri": "http://purl.org/coar/access_right/c_14cb"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Tanaka, Rie"}], "nameIdentifiers": [{"nameIdentifier": "554550", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Ichikawa, Katsuhiro"}], "nameIdentifiers": [{"nameIdentifier": "554551", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Mori, Shinichiro"}], "nameIdentifiers": [{"nameIdentifier": "554552", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Dobashi, Suguru"}], "nameIdentifiers": [{"nameIdentifier": "554553", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Kumagai, Motoki"}], "nameIdentifiers": [{"nameIdentifier": "554554", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Sanada, Shigeru"}], "nameIdentifiers": [{"nameIdentifier": "554555", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "et.al"}], "nameIdentifiers": [{"nameIdentifier": "554556", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "田中 利恵", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "554557", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "市川 勝弘", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "554558", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "森 慎一郎", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "554559", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "土橋 卓", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "554560", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "熊谷 始紀", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "554561", "nameIdentifierScheme": "WEKO"}]}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "eng"}]}, "item_resource_type": {"attribute_name": "資源タイプ", "attribute_value_mlt": [{"resourcetype": "conference paper", "resourceuri": "http://purl.org/coar/resource_type/c_5794"}]}, "item_title": "Effects of image lag on real-time target tracking in radiotherapy", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "Effects of image lag on real-time target tracking in radiotherapy"}]}, "item_type_id": "10003", "owner": "1", "path": ["2"], "permalink_uri": "https://repo.qst.go.jp/records/54296", "pubdate": {"attribute_name": "公開日", "attribute_value": "2011-09-25"}, "publish_date": "2011-09-25", "publish_status": "0", "recid": "54296", "relation": {}, "relation_version_is_last": true, "title": ["Effects of image lag on real-time target tracking in radiotherapy"], "weko_shared_id": -1}
Effects of image lag on real-time target tracking in radiotherapy
https://repo.qst.go.jp/records/54296
https://repo.qst.go.jp/records/54296fb5bc51c-6d7f-488b-b8df-1c843d9344f4
Item type | 会議発表論文 / Conference Paper(1) | |||||
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公開日 | 2011-09-25 | |||||
タイトル | ||||||
タイトル | Effects of image lag on real-time target tracking in radiotherapy | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_5794 | |||||
資源タイプ | conference paper | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Tanaka, Rie
× Tanaka, Rie× Ichikawa, Katsuhiro× Mori, Shinichiro× Dobashi, Suguru× Kumagai, Motoki× Sanada, Shigeru× et.al× 田中 利恵× 市川 勝弘× 森 慎一郎× 土橋 卓× 熊谷 始紀 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | There is a concern that image lag may reduce accuracy of real-time target tracking in radiotherapy. This study was performed to investigate influence of image lag on the accuracy of target tracking in radiotherapy. Fluoroscopic images were obtained using a direct type of dynamic flat-panel detector (FPD) system under conditions of target tracking during radiotherapy. The images continued to be read out after X-irradiations and cutoff, and image lag properties in the system were then determined. Subsequently, a tungsten materials plate with a precision edge was mounted on to a motor control device, which provided a constant velocity. The plate was moved into the center of the detector at movement rate of 10 and 20 mm/s, covering lung tumor movement of normal breathing, and MTF and profile curves were measured on the edges covering and uncovering the detector. A lung tumor with blurred edge due to image lag was simulated using the results and then superimposed on breathing chest radiographs of a patient. The moving target with and without image lag was traced using a template-matching technique. In the results, the target could be traced within a margin for error in external radiotherapy. The results indicated that there was no effect of image lag on target tracking in usual breathing speed in a radiotherapy situation. Further studies are required to investigate influence by the other factors, such as exposure dose, target size and shape, imaging rate, and thickness of a patients body. |
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書誌情報 |
Proceedings of SPIE 巻 7622, p. 000-000, 発行日 2011-02 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0277-786X |