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Misalignment Detection in X-Ray Microtomographic Imaging System
Başlık:
Misalignment Detection in X-Ray Microtomographic Imaging System
Yazar:
Pornpojratanakul, Vinai, author.
ISBN:
9780438049895
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (197 pages)
Genel Not:
Source: Dissertation Abstracts International, Volume: 79-10(E), Section: B.
Advisors: Ping-Chin Cheng Committee members: Pao-Lo Liu; Feng Qin; Mohammed Safiuddin; Darold C. Wobschall.
Özet:
X-ray microtomography becomes a promising and effective tool in various fields of internal structure studies on micrometer scale. Its resolution has been developed to reach a level far beyond the ability of a conventional medical tomography. Behind successful progressions, the quality of reconstruction images in x-ray microtomography depends on correct parameters of the system. A system calibration is a required procedure in every scanning in order to derive system parameters for reconstruction process. Without accurate values of a parameter set, a reconstruction image may be distorted or severely unrecognizable. Although being equipped with precision assistance devices, a microtomography system has a limitation by its system mechanical precision. This dissertation proposes a potential method to identify a parameter causing a misalignment effect revealing on a reconstruction result. Instead of resolving parameters in the spatial domain, major misaligned situations of metal balls are extensively analyzed in the frequency domain. The simulation study performs with a metal-sphere marker and each misaligned parameter may show its unique pattern reflecting in both power spectrum and phase of the frequency response, so a pattern defines a value of a misaligned parameter. Once knowing an incorrect variable and its value, the reconstruction process is repeated to generate a new result with better accuracy. The simulation result of this dissertation shows a possibility to detect a misalignment of x-ray microtomography system and appling this idea can enhance its reconstruction images.
Notlar:
School code: 0656
Tüzel Kişi Ek Girişi:
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(682038.1) | 682038-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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