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A phantom study investigating the relationship between ground-glass opacity visibility and physical detectability index in low-dose chest computed tomography
http://hdl.handle.net/2297/43453
http://hdl.handle.net/2297/43453e82dece3-b990-4298-865b-45455275cdc1
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
ME-PR-CHIKAWA-K-202.pdf (460.4 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2017-10-03 | |||||
| タイトル | ||||||
| タイトル | A phantom study investigating the relationship between ground-glass opacity visibility and physical detectability index in low-dose chest computed tomography | |||||
| 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_6501 | |||||
| 資源タイプ | journal article | |||||
| 著者 |
Ichikawa, Katsuhiro
× Ichikawa, Katsuhiro× Kobayashi, Takeshi× Sagawa, Motoyasu× Katagiri, Ayako× Uno, Yukiko× Nishioka, Ryo× Matsuyama, Jun |
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| 書誌情報 |
Journal of Applied Clinical Medical Physics 巻 16, 号 4, p. 202-215, 発行日 2015-01-01 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1526-9914 | |||||
| NCID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA12034060 | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1120/jacmp.v16i4.5001 | |||||
| 出版者 | ||||||
| 出版者 | American Institute of Physics Publising LLC | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In this study, the relationship between ground-glass opacity (GGO) visibility and physical detectability index in low-dose computed tomography (LDCT) for lung cancer screening was investigated. An anthropomorphic chest phantom that included synthetic GGOs with CT numbers of -630 Hounsfield units (HU; high attenuation GGO: HGGO) and -800 HU (low attenuation GGO: LGGO), and three phantoms for physical measurements were employed. The phantoms were scanned using 12 CT systems located in 11 screening centers in Japan. The slice thicknesses and CT dose indices (CTDI<inf>vol</inf>) varied over 1.0-5.0 mm and 0.85-3.30 mGy, respectively, and several reconstruction kernels were used. Physical detectability index values were calculated from measurements of resolution, noise, and slice thickness properties for all image sets. Five radiologists and one thoracic surgeon, blind to one another's observations, evaluated GGO visibility using a five-point scoring system. The physical detectability index correlated reasonably well with the GGO visibility (R2 = 0.709, p < 0.01 for 6 mm HGGO and R2 = 0.646, p < 0.01 for 10 mm LGGO), and was nearly proportional to the CTDI<inf>vol</inf>. Consequently, the CTDIvol also correlated reasonably well with the GGO visibility (R2 = 0.701, p < 0.01 for 6 mm HGGO and R2 = 0.680, p < 0.01 for 10 mm LGGO). As a result, the CTDI<inf>vol</inf> was nearly dominant in the GGO visibility for image sets with different reconstruction kernels and slice thicknesses, used in this study. | |||||
| 著者版フラグ | ||||||
| 出版タイプ | AM | |||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
