Evaluation of Porosity and Its Variation in Porous Materials Using Microfocus X-ray Computed Tomography Considering the Partial Volume Effect

Kato, Masaji; Takahashi, Manabu; Kawasaki, Satoru; Mukunoki, Toshifumi; Kaneko, Katsuhiko

Evaluation of Porosity and Its Variation in Porous Materials Using Microfocus X-ray Computed Tomography Considering the Partial Volume Effect

Kato, Masaji; Takahashi, Manabu; Kawasaki, Satoru et al.

MATERIALS TRANSACTIONS, 2013, 54(9), 1678-1685

Permalink : https://hdl.handle.net/2115/56962

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アクセス権	open access
URI	https://hdl.handle.net/2115/56962
タイトル	Evaluation of Porosity and Its Variation in Porous Materials Using Microfocus X-ray Computed Tomography Considering the Partial Volume Effect
著者	Kato, Masaji ; Takahashi, Manabu ; Kawasaki, Satoru ; Mukunoki, Toshifumi ; Kaneko, Katsuhiko
e-Rad_Researcher 10250474 著者名 Kato, Masaji
e-Rad_Researcher 20357370 著者名 Takahashi, Manabu
e-Rad_Researcher 00304022 著者名 Kawasaki, Satoru
e-Rad_Researcher 30423651 著者名 Mukunoki, Toshifumi
e-Rad_Researcher 20128268 著者名 Kaneko, Katsuhiko
言語	英語
キーワード	porous material
	X-ray CT
	partial volume effect
	image segmentation
	histogram-based thresholding
	mixel
	maximum likelihood criteria
	sandstone
	packed glass beads
発行日	2013
出版者	The Mining and Materials Processing Institute of Japan
収録物名	MATERIALS TRANSACTIONS
巻(号)	54(9)
ページ	1678-1685
抄録	The physical properties of two-phase materials depend on their internal structure. Therefore, segmentation of the structure of such materials is important in material sciences. In this study, we used a maximum likelihood thresholding method that considered the partial volume effect —i.e., the effect of mixels (mixed pixels)— to calculate the porosities of packed glass beads and the Berea sandstone using microfocus X-ray computed tomography (CT) images. We also examined the effects of scanning conditions on the segmentation results and assessed the porosity of possible packing structures of the glass beads to be segmented to be 33–37% based on histogram data. Moreover, we evaluated the porosity of the Berea sandstone to be 18%. Then, we examined variation in the porosity of biogrouted packing of glass beads using a microfocus X-ray CT scanner and histogram-based image analysis with the same thresholding method. Our results indicated that the ratio of grouted to ungrouted geomaterial porosities was 0.98, whereas the value estimated by measuring changes in the concentration of calcium ions was 0.98–0.99. Thus, we have confirmed that the proposed method can evaluate small changes in porosity with high accuracy.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
PISSN	1345-9678
EISSN	1347-5320
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.2320/matertrans.M-M2013813