Effect of sample structure on reconstruction quality in computed tomography

Cao, Meng; Zhang, Hai-Bo; Li, Chao; Nishi, Ryuji
February 2009
Review of Scientific Instruments;Feb2009, Vol. 80 Issue 2, pN.PAG
Academic Journal
We have investigated the effect of a sample structure on reconstruction quality in computed tomography (CT). A power spectrum with respect to a projection angle is used to represent the sample structure. The condition for high quality reconstruction is then analyzed with the simulation and the electron tomography experiment based on an ultrahigh voltage electron microscope. The truncated terms in the power spectrum are suggested to be less than 10-3 for high quality reconstruction. The effect of the sample structure is believed to be an important factor for high quality reconstruction of complex samples in various CT techniques.


Related Articles

  • Microspectroscopy and imaging using a delay line detector in time-of-flight photoemission microscopy. Oelsner, A.; Schmidt, O.; Schicketanz, M.; Klais, M.; Scho¨nhense, G.; Mergel, V.; Jagutzki, O.; Schmidt-Bo¨cking, H. // Review of Scientific Instruments;Oct2001, Vol. 72 Issue 10, p3968 

    A method for microspectroscopy and energy-selective imaging using a special photoemission electron microscope (PEEM) is presented. A modified commercial PEEM was combined with a delay line device as x, y, t detector serving as the basic arrangement for spectromicroscopy. One can measure the time...

  • Diffuse Optical Tomography of the Breast: Initial Validation in Benign Cysts. Stephanie van de Ven; Sjoerd Elias; Andrea Wiethoff; Marjolein van der Voort; Anais Leproux; Tim Nielsen; Bernhard Brendel; Leon Bakker; Martin van der Mark; Willem Mali; Peter Luijten // Molecular Imaging & Biology;Mar2009, Vol. 11 Issue 2, p64 

    Abstract Purpose  The purpose of this study was to validate a newly developed diffuse optical tomography (DOT) system on benign cysts in the breast. Procedures  Eight patients with 20 benign cysts were included. Study procedures consisted of optical breast imaging and breast...

  • High-performance double-filter soft x-ray diagnostic for measurement of electron temperature structure and dynamics. McGarry, M. B.; Franz, P.; Den Hartog, D. J.; Goetz, J. A.; Thomas, M. A.; Reyfman, M.; Kumar, S. T. A. // Review of Scientific Instruments;Oct2012, Vol. 83 Issue 10, p10E129 

    A new soft x-ray (SXR) Te and tomography diagnostic has been developed for MST that can be used for simultaneous SXR spectrum measurement, tomographically reconstructed emissivity, and reconstructed and line-of-sight electron temperature. The diagnostic utilizes high-performance differential...

  • An Iterative Method for Improving the Quality of Reconstruction of a Three-Dimensional Surface. Vishnyakov, G. N.; Levin, G. G.; Sukhorukov, K. A. // Optics & Spectroscopy;Dec2005, Vol. 99 Issue 6, p1012 

    A complex image with constraints imposed on the amplitude and phase image components is processed using the Gerchberg iterative algorithm for the first time. The use of the Gerchberg iterative algorithm makes it possible to improve the quality of a three-dimensional surface profile reconstructed...

  • Morphological, electrical and optical properties of 1-(3-hydroxypropylamino)-9,10-anthraquinone films prepared by Hot Wall technique. R. Bedi; S. Bhatia; N. Kaur; S. Kumar // European Physical Journal - Applied Physics;Feb2008, Vol. 41 Issue 2, p97 

    The films of 1-(3-hydroxypropylamino)-9,10-anthraquinone (1) obtained by Hot Wall Epitaxy technique (HWE) have been studied for their morphological and electrical properties. The films were deposited on to the glass substrate at different temperatures kept at pressure of ~1.33?10-3Pa. The powder...

  • Investigation into regional thermal structure of the Thrace Region, NW Turkey, from aeromagnetic and borehole data. Mümtaz Hisarli, Z.; Nuri Dolmaz, M.; Okyar, Mahmut; Etiz, Ali; Orbay, Naci // Studia Geophysica & Geodaetica;Jan2012, Vol. 56 Issue 1, p269 

    The aeromagnetic values over the study region are relatively uniform except for a few anomalies in the northeastern and southwestern areas. Analyses of aeromagnetic data were performed in NW Turkey, in order to have a look into the subsurface regional thermal structure of the region. For this...

  • Reliability test of popular fractal techniques applied to small two-dimensional self-affine data sets. Talibuddin, S.; Runt, J. P. // Journal of Applied Physics;11/1/1994, Vol. 76 Issue 9, p5070 

    Examines fractal analysis techniques for accuracy, consistency and sensitivity by applying them to self-affine surfaces of fractal dimensions. Applications of fractal dimesion; Information on the dimensions associated with a self-affine surface; Potential causes of the disparity between the...

  • ATMOSPHERIC FLUCTUATIONS BELOW 0.1 HZ DURING DRIFT-SCAN SOLAR DIAMETER MEASUREMENTS. Sigismondi, C.; Raponi, A.; De Rosi, G.; Bianda, M.; Ramelli, R.; Caccia, M.; Maspero, M.; Negrinia, L.; Wang, X. // EAS Publications Series;2012, Vol. 55, p381 

    Measurements of the power spectrum of the seeing in the range 0.001-1 Hz have been performed in order to understand the criticity of the transits method for solar diameter monitoring.

  • Spectrum dynamics of negative-effective-mass oscillators under terahertz radiation. Cao, J. C.; Lei, X. L.; Li, A. Z.; Liu, H. C. // Applied Physics Letters;4/23/2001, Vol. 78 Issue 17, p2524 

    We report on a theoretical investigation of power spectrum dynamics in negative-effective-mass (NEM) p[sup +]pp[sup +] oscillators under the influence of terahertz (THz) electromagnetic radiation. Possible types of transport states (periodic or chaotic) and transitions between them are examined...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics