Performance Evaluation of FBP Reconstruction in SPECT Imaging

Authors

  • E. Hajizadeh Associate Professor, Dept. of Biostatistics, Tarbiat Modarres University, Tehran, Iran.
  • E. Raeisi Ph.D. Student in Medical Physics, Tarbiat Modarres University, Tehran, Iran.
  • H. Rajabi Assistant Professor, Medical Physics Dept., Tarbiat Modarres University, Tehran, Iran.
  • S. Seifollahy M.D., Dept. of Nuclear Medicine, Rajaei Heart Centere, Tehran, Iran.
Abstract:

Introduction:  The  purpose  of  this  study  is  to  define  the  optimal  parameters  for  the  tomographic  reconstruction procedure in a routine single photon emission tomography. The Hoffman brain phantom  is modified to evaluate the reconstruction method. The phantom was imaged in a 3 and 2-dimensional  conformation and the results were compared.   Materials  and  Methods:  The  2D  phantom  (slices)  was  imaged  independently.  The  tomographic  image was performed using the phantom in 3D conformation. Planar image was used as the reference  image for each corresponding reconstructed slice image. A set of projection data with different count  densities were obtained from 99mTc with the phantom. The data were transformed into interfile format  and transferred to personal computer. A software was designed in Matlab (Version 7) to support the  phantom  and  the  automatic  calculation.  All  the  data  were  reconstructed  using  back-projection  technique with the ramp, Shepp-Logan, Cosine, Hamming, Hanning (each filter having so different  parameters), Butterworth, Metz and Wiener (each filter having 2000 different parameters). The quality  of the images was estimated by comparing the reconstructed images with the reference image by the  use of universal image quality index (UIQI).  Results: All the filters tested score substantially better than the control (P

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Journal title

volume 2  issue 2

pages  45- 54

publication date 2005-06-01

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