ログイン
言語:

WEKO3

  • トップ
  • ランキング
To
lat lon distance
To

Field does not validate



インデックスリンク

インデックスツリー

メールアドレスを入力してください。

WEKO

One fine body…

WEKO

One fine body…

アイテム

{"_buckets": {"deposit": "8b66b1a7-eadc-4a9b-a6f8-000003ff7194"}, "_deposit": {"created_by": 1, "id": "67680", "owners": [1], "pid": {"revision_id": 0, "type": "depid", "value": "67680"}, "status": "published"}, "_oai": {"id": "oai:repo.qst.go.jp:00067680", "sets": ["28"]}, "author_link": ["665122", "665127", "665126", "665125", "665123", "665124"], "item_10005_date_7": {"attribute_name": "発表年月日", "attribute_value_mlt": [{"subitem_date_issued_datetime": "2003-12-06", "subitem_date_issued_type": "Issued"}]}, "item_10005_description_5": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "We have developed a prototype of 4-dimensional (4D) CT-scanner that employs continuous rotation of cone-beam, the number of elements are 912 channels x 256 segments; element size is approximately 1mm x 1mm. Scanning time is 1.0sec/rotation. Data sampling rate is 900 views (frames)/sec. The potential drawback of cone beam CT is a larger amount of scattered x-rays than conventional CT-scanner. Our purpose in this work was to estimate scattered-to-primary ratio (S/P) and observe its effects on the reconstructed images as variation of a beam width (5-128mm).\n S/P was measured by scanning cylindrical water phantom and interrupting the primary with Pb disk. The effects of scattered radiation on the images was evaluated with noise and uniformity of CT number, the low contrast detectability and the differences of CT number between air cavity in the water phantom and air region outside it.\n\\nThough S/P increased as the beam width became wider, noise and uniformity of CT numbers depended little on the beam width. Low contrast detectability did not depend on it. However CT numbers differed 38 at 5mm beam width and 67 at 128mm beam width between the air cavity and the air region outside. S/P of 200mm-diam-water phantom for 120kVp was approximately 8% (128mm beam width) and approximately 1% (10mm beam width).\n The results suggested that scattered radiation seemed little effect on image quality except quantitativeness of CT-number in 4D CT.", "subitem_description_type": "Abstract"}]}, "item_10005_description_6": {"attribute_name": "会議概要(会議名, 開催地, 会期, 主催者等)", "attribute_value_mlt": [{"subitem_description": "RSNA(Radiological Society of North America)", "subitem_description_type": "Other"}]}, "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": "Mori, Shinichirou"}], "nameIdentifiers": [{"nameIdentifier": "665122", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Endo, Masahiro"}], "nameIdentifiers": [{"nameIdentifier": "665123", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Tsunoo, Takanori"}], "nameIdentifiers": [{"nameIdentifier": "665124", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "森 慎一郎", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "665125", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "遠藤 真広", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "665126", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "角尾 卓紀", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "665127", "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 object", "resourceuri": "http://purl.org/coar/resource_type/c_c94f"}]}, "item_title": "Estimation of scattered radiation amount and its effects on image quality in 4D CT", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "Estimation of scattered radiation amount and its effects on image quality in 4D CT"}]}, "item_type_id": "10005", "owner": "1", "path": ["28"], "permalink_uri": "https://repo.qst.go.jp/records/67680", "pubdate": {"attribute_name": "公開日", "attribute_value": "2003-12-18"}, "publish_date": "2003-12-18", "publish_status": "0", "recid": "67680", "relation": {}, "relation_version_is_last": true, "title": ["Estimation of scattered radiation amount and its effects on image quality in 4D CT"], "weko_shared_id": -1}
  1. 学会発表・講演等
  2. ポスター発表

Estimation of scattered radiation amount and its effects on image quality in 4D CT

https://repo.qst.go.jp/records/67680
https://repo.qst.go.jp/records/67680
151e228e-c464-44db-ae33-5f3c1b69acb5
Item type 会議発表用資料 / Presentation(1)
公開日 2003-12-18
タイトル
タイトル Estimation of scattered radiation amount and its effects on image quality in 4D CT
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_c94f
資源タイプ conference object
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 Mori, Shinichirou

× Mori, Shinichirou

WEKO 665122

Mori, Shinichirou

Search repository
Endo, Masahiro

× Endo, Masahiro

WEKO 665123

Endo, Masahiro

Search repository
Tsunoo, Takanori

× Tsunoo, Takanori

WEKO 665124

Tsunoo, Takanori

Search repository
森 慎一郎

× 森 慎一郎

WEKO 665125

en 森 慎一郎

Search repository
遠藤 真広

× 遠藤 真広

WEKO 665126

en 遠藤 真広

Search repository
角尾 卓紀

× 角尾 卓紀

WEKO 665127

en 角尾 卓紀

Search repository
抄録
内容記述タイプ Abstract
内容記述 We have developed a prototype of 4-dimensional (4D) CT-scanner that employs continuous rotation of cone-beam, the number of elements are 912 channels x 256 segments; element size is approximately 1mm x 1mm. Scanning time is 1.0sec/rotation. Data sampling rate is 900 views (frames)/sec. The potential drawback of cone beam CT is a larger amount of scattered x-rays than conventional CT-scanner. Our purpose in this work was to estimate scattered-to-primary ratio (S/P) and observe its effects on the reconstructed images as variation of a beam width (5-128mm).
S/P was measured by scanning cylindrical water phantom and interrupting the primary with Pb disk. The effects of scattered radiation on the images was evaluated with noise and uniformity of CT number, the low contrast detectability and the differences of CT number between air cavity in the water phantom and air region outside it.
\nThough S/P increased as the beam width became wider, noise and uniformity of CT numbers depended little on the beam width. Low contrast detectability did not depend on it. However CT numbers differed 38 at 5mm beam width and 67 at 128mm beam width between the air cavity and the air region outside. S/P of 200mm-diam-water phantom for 120kVp was approximately 8% (128mm beam width) and approximately 1% (10mm beam width).
The results suggested that scattered radiation seemed little effect on image quality except quantitativeness of CT-number in 4D CT.
会議概要(会議名, 開催地, 会期, 主催者等)
内容記述タイプ Other
内容記述 RSNA(Radiological Society of North America)
発表年月日
日付 2003-12-06
日付タイプ Issued
戻る
0
views
See details
Views

Versions

Ver.1 2023-05-15 20:34:57.421380
Show All versions

Share

Mendeley Twitter Facebook Print Addthis

Cite as

エクスポート

OAI-PMH
  • OAI-PMH JPCOAR
  • OAI-PMH DublinCore
  • OAI-PMH DDI
Other Formats
  • JSON
  • BIBTEX

Confirm


Powered by WEKO3


Powered by WEKO3