チタン製の脳動脈瘤クリップによる1.5 Tesla- と3 Tesla-MR 画像の歪みとアーチファクトの検討─コバルト60定位手術的照射治療計画に及ぼす影響─
書誌事項
- タイトル別名
-
- Image Distortion and Artifacts Caused by the Use of a Titanium Aneurism Clip in 1.5 Tesla- and 3 Tesla-Magnetic Resonance Imaging: Effect on <sup>60</sup>Cobalt Stereotactic Radiosurgery Treatment Planning
- 臨床技術 チタン製の脳動脈瘤クリップによる1.5Tesla-と3Tesla-MR画像の歪みとアーチファクトの検討 : コバルト60定位手術的照射治療計画に及ぼす影響
- リンショウ ギジュツ チタンセイ ノ ノウ ドウミャクリュウ クリップ ニ ヨル 1.5Tesla-ト 3Tesla-MR ガゾウ ノ ヒズミ ト アーチファクト ノ ケントウ : コバルト 60 テイイ シュジュツテキ ショウシャ チリョウ ケイカク ニ オヨボス エイキョウ
- Image Distortion and Artifacts Caused by the Use of a Titanium Aneurism Clip in 1.5 Tesla- and 3 Tesla-Magnetic Resonance Imaging: Effect on 60Cobalt Stereotactic Radiosurgery Treatment Planning
この論文をさがす
抄録
In gamma knife stereotactic radiosurgery (GKSRS) treatment planning, 1.5 tesla (T)-magnetic resonance imaging (MRI) is normally used to identify the target lesion. Image artifacts and distortion arise in MRI if a titanium clip is surgically implanted in the brain to treat cerebral aneurysm. 3-T MRI scanners, which are increasingly being adopted, provide imaging of anatomic structures with better clinical usefulness than 1.5-T MRI machines. We investigated signal defects and image distortions both close to and more distant from the titanium clip in 1.5-T and 3-T MRI. Two kinds of phantoms were scanned using 1.5-T and 3-T MRI. Acquisitions with and without the clip were performed under the same scan parameters. No difference was observed between 1.5 T and 3 T in local decrease of signal intensity; however, image distortion was observed at 20 mm from the clip in 3 T. Over the whole region, the distortions caused by the clip were less than 0.3 mm and 1.6 mm under 1.5-T and 3-T MRI, respectively. The geometric accuracy of 1.5-T MRI was better than 3-T MRI and thus better for GKSRS treatment planning. 3-T MRI, however, appears less suitable for use in treatment planning.
収録刊行物
-
- 日本放射線技術学会雑誌
-
日本放射線技術学会雑誌 70 (6), 534-541, 2014
公益社団法人 日本放射線技術学会
- Tweet
キーワード
詳細情報 詳細情報について
-
- CRID
- 1390282681338466688
-
- NII論文ID
- 130004486930
-
- NII書誌ID
- AN00197784
-
- COI
- 1:STN:280:DC%2BC2cfkvFyisg%3D%3D
-
- ISSN
- 18814883
- 03694305
-
- NDL書誌ID
- 025615617
-
- PubMed
- 24953318
-
- 本文言語コード
- ja
-
- データソース種別
-
- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可