title: Experimental studies on few-view reconstruction for high-resolution micro-CT.
abstract: High-resolution micro-CT offers 3D non-destructive imaging but scan times are prohibitively large in many cases. Advancements in image reconstruction offer great reduction in number of views while maintaining reconstruction accuracy; yet filtered back projection remains the de facto standard. An extensive study of few-view reconstruction using compressed-sensing based iterative techniques is carried out. Also, a novel 3D micro-CT phantom is proposed, and used for analyzing reconstruction accuracy. Numerical tests, and studies on real micro-CT data show that if measurement noise in projections is not extremely high, the number of views may be reduced to <formula>1/8^{th}</formula> of the typically acquired view numbers. The study motivates the adoption of advanced reconstruction techniques to allow faster scanning, lower dosage, and reduced data size in high-resolution micro-CT.
authors.affiliation: Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA, USA.
authors.forename: Kriti
authors.initials: K
authors.lastname: Sen Sharma
authors.forename: Xin
authors.initials: X
authors.lastname: Jin
authors.forename: Christian
authors.initials: C
authors.lastname: Holzner
authors.forename: Shree
authors.initials: S
authors.lastname: Narayanan
authors.forename: Baodong
authors.initials: B
authors.lastname: Liu
authors.forename: Dong
authors.initials: D
authors.lastname: Wang
authors.forename: Masoud
authors.initials: M
authors.lastname: Agah
authors.forename: Linbing
authors.initials: L
authors.lastname: Wang
authors.forename: Hengyong
authors.initials: H
authors.lastname: Yu
authors.forename: Ge
authors.initials: G
authors.lastname: Wang
mesh_terms: D000465:Algorithms; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods; D019047:Phantoms, Imaging; D016012:Poisson Distribution; D055114:X-Ray Microtomography / Q000379:methods*