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Paper Information

Journal:   IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES   NOVEMBER 2013 , Volume 16 , Number 11; Page(s) 1181 To 1189.
 
Paper: 

A NEW APPROACH FOR SCATTER REMOVAL AND ATTENUATION COMPENSATION FROM SPECT/CT IMAGES

 
 
Author(s):  OLOOMI SHABNAM, NOORI ESKANDARI HADI, ZAKAVI SEYED RASOUL, KNOLL PETER, KALANTARI FARAZ, HAJIZADEH SAFFA MOHSEN*
 
* DEPARTMENT OF MEDICAL PHYSICS, MASHHAD UNIVERSITY FOR MEDICAL SCIENCES, MASHHAD, IRAN
 
Abstract: 

Objective (s): In SPECT, the sinogram contains scatter and lack of attenuated counts that degrade the reconstructed image quality and quantity. Many techniques for attenuation and scatter correction have been proposed. An acceptable method of correction is to incorporate effects into an iterative statistical reconstruction. Here, we propose new Maximum Likelihood Expectation Maximization (MLEM) formula to correct scattering and attenuating photons during reconstruction.
Materials and Methods: In this work, scatters are estimated through Klein-Nishina formula in all iterations and CT images are used for accurate attenuation correction. Reconstructed images resulted from different MLEM reconstruction formula have been compared considering profile agreement, contrast, mean square error, signal-to-noise ratio, contrast-to-noise ratio and computational time.
Results: The proposed formula has a good profile agreement, increased contrast, signal-to-noise (SNR) & contrast-to-noise ratio (CNR), computational time and decreased mean square error (MSE) compared with uncorrected images and/or images from conventional formula.
Conclusion: In conclusion, by applying the proposed formula we were able to correct attenuation and scatter via MLEM and improve the image quality, which is a necessary step for both qualitative and quantitative SPECT images.

 
Keyword(s): ATTENUATION CORRECTION, MLEM, SCATTER CORRECTION, SPECT
 
 
References: 
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Citations: 
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+ Click to Cite.
APA: Copy

OLOOMI, S., & NOORI ESKANDARI, H., & ZAKAVI, S., & KNOLL, P., & KALANTARI, F., & HAJIZADEH SAFFA, M. (2013). A NEW APPROACH FOR SCATTER REMOVAL AND ATTENUATION COMPENSATION FROM SPECT/CT IMAGES. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES, 16(11), 1181-1189. https://www.sid.ir/en/journal/ViewPaper.aspx?id=405529



Vancouver: Copy

OLOOMI SHABNAM, NOORI ESKANDARI HADI, ZAKAVI SEYED RASOUL, KNOLL PETER, KALANTARI FARAZ, HAJIZADEH SAFFA MOHSEN. A NEW APPROACH FOR SCATTER REMOVAL AND ATTENUATION COMPENSATION FROM SPECT/CT IMAGES. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES. 2013 [cited 2021November27];16(11):1181-1189. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=405529



IEEE: Copy

OLOOMI, S., NOORI ESKANDARI, H., ZAKAVI, S., KNOLL, P., KALANTARI, F., HAJIZADEH SAFFA, M., 2013. A NEW APPROACH FOR SCATTER REMOVAL AND ATTENUATION COMPENSATION FROM SPECT/CT IMAGES. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES, [online] 16(11), pp.1181-1189. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=405529.



 
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