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Adaptive Partial Median Filter for Early CT Signs of Acute Cerebral Infarction
http://hdl.handle.net/10191/6246
http://hdl.handle.net/10191/6246c0cbd252-52fe-496f-8c84-7265c616b569
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
05_0001.pdf (966.7 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2008-04-18 | |||||
| タイトル | ||||||
| タイトル | Adaptive Partial Median Filter for Early CT Signs of Acute Cerebral Infarction | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | computer-aided diagnosis (CAD) | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | acute cerebral infarction | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | noise reduction | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | edge preserving | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | improved median filter | |||||
| 資源タイプ | ||||||
| 資源 | http://purl.org/coar/resource_type/c_6501 | |||||
| タイプ | journal article | |||||
| 著者 |
Lee, Yongbum
× Lee, Yongbum× Takahashi, Noriyuki× Tsai, Du-Yih× Ishii, Kiyoshi |
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| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 9 | |||||
| 姓名 | 李, 鎔範 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 6415 | |||||
| 姓名 | 蔡, 篤儀 | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Purpose: Detection of early CT signs of infarct in non-enhanced CT image is mandatory in patients with acute ischemic stroke. Loss of the gray-white matter interface at the lentiform nucleus or the insular ribbon has been an important early CT sign of acute cerebral infarction, which affects decisions on thrombolytic therapy. However, its detection is difficult, since the principal early CT sign is subtle hypoattenuation. An image processing method to reduce local noise with edges preserved was developed to improve infarct detection. Rationale: An adaptive partial median filter (APMF) was selected for this application, since the APMF can markedly improve the visibility of the normal gray-white matter interface. APMF should enhance the conspicuity of gray-white matter interface changes due to hypoattenuation that accompanies cerebral infarction. Method: In a criterion referenced performance study using simulated CT images with gray-white matter interfaces, a total of 14 conventional smoothing filters were also used for comparison to validate the usefulness of the proposed APMF. The APMF indicated the highest performance among the compared methods. Then, observer performance study by receiver operator characteristic (ROC) analysis was performed with 4 radiologist observers using a database with 18 abnormal and 33 normal head CT images. Results: The average Az values of ROC curves for all radiologists increased from 0.876 without the APMF images to 0.926 with the APMF images, and this difference was statistically significant (P=0.04). Conclusion: The results from the two observer performance studies demonstrated that APMF has significant potential to improve the diagnosis of acute cerebral infarction using non-enhanced CT images. | |||||
| 書誌情報 |
International Journal of Computer Assisted Radiology and Surgery en : International Journal of Computer Assisted Radiology and Surgery 巻 2, 号 2, p. 105-115, 発行日 2007-08 |
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| 出版者 | ||||||
| 出版者 | Springer Berlin/Heidelberg | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 18616429 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | info:doi/10.1007/s11548-007-0123-3 | |||||
| 著者版フラグ | ||||||
| 値 | author | |||||
| 異版である | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://www.springerlink.com/content/120019 | |||||
