Comparison of Chang’s with Sorenson’s attenuation correction method by varying linear attenuation coefficient values in Tc-99m SPECT imaging

Comparison of Chang’s with Sorenson’s attenuation correction method by varying linear attenuation coefficient values in Tc-99m SPECT imaging

Attenuation (scattering and absorption) of gamma photons in the patient’s body is one of the major limitations among the others in single photon emission computed tomography (SPECT). It reduces quantitative accuracy of measured radioactivity concentration and causes hot rim artifacts in reconstruct...

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Main Authors: Sayed, Inayatullah Shah, Zakaria, Ahmed, Nik, Norhafiza
Format: Book Chapter
Language:English
English
English
Published: Springer-Verlag Berlin Heidelberg 2008
Subjects:
QC Physics
Online Access:http://irep.iium.edu.my/5176/
http://irep.iium.edu.my/5176/
http://irep.iium.edu.my/5176/
http://irep.iium.edu.my/5176/4/Cover_page.pdf
http://irep.iium.edu.my/5176/1/Chang%27s_Vs_Sorenson_ATC_LNCS-FP_2008.pdf
http://irep.iium.edu.my/5176/5/Cover_book.pdf
id iium-5176
recordtype eprints
spelling iium-51762013-02-13T16:07:40Z http://irep.iium.edu.my/5176/ Comparison of Chang’s with Sorenson’s attenuation correction method by varying linear attenuation coefficient values in Tc-99m SPECT imaging Sayed, Inayatullah Shah Zakaria, Ahmed Nik, Norhafiza QC Physics Attenuation (scattering and absorption) of gamma photons in the patient’s body is one of the major limitations among the others in single photon emission computed tomography (SPECT). It reduces quantitative accuracy of measured radioactivity concentration and causes hot rim artifacts in reconstructed images if not corrected for. A variety of approximate attenuation correction methods has been developed or proposed by various groups to date,but all methods have some limitations. In this paper two attenuation correction methods have been investigated and compared. Data are acquired with both the collimators either LEGP or LEHR by scanning R. A. Carlson cylindrical phantom over 360o with an acrylic block of holes simulating hot regions of various sizes at different locations with respect to the walls of the phantom,which was filled with water and Tc-99m solution was uniformly distributed. Results show that the Chang’s attenuation correction method works better as compared to the Sorenson’s method in terms of the linearity in measured counts in hot regions. However, Chang’s method is sensitive with linear attenuation coefficient values and also gives higher standard deviation values particularly in smaller hot regions count density – with LEHR collimator data - compared to the Sorenson’s method. Springer-Verlag Berlin Heidelberg 2008 Book Chapter PeerReviewed application/pdf en http://irep.iium.edu.my/5176/4/Cover_page.pdf application/pdf en http://irep.iium.edu.my/5176/1/Chang%27s_Vs_Sorenson_ATC_LNCS-FP_2008.pdf application/pdf en http://irep.iium.edu.my/5176/5/Cover_book.pdf Sayed, Inayatullah Shah and Zakaria, Ahmed and Nik, Norhafiza (2008) Comparison of Chang’s with Sorenson’s attenuation correction method by varying linear attenuation coefficient values in Tc-99m SPECT imaging. In: Medical imaging and informatics : 2nd International Conference, MIMI 2007, Beijing, China, August 14-16, 2007 Revised Selected Papers. Lecture Notes in Computer Science - LNCS, 4987 . Springer-Verlag Berlin Heidelberg , Germany, pp. 216-222. ISBN 9783540794899 http://dx.doi.org/10.1007/978-3-540-79490-5_27 doi:10.1007/978-3-540-79490-5_27
repository_type Digital Repository
institution_category Local University
institution International Islamic University Malaysia
building IIUM Repository
collection Online Access
language English
English
English
topic QC Physics
spellingShingle QC Physics
Sayed, Inayatullah Shah
Zakaria, Ahmed
Nik, Norhafiza
Comparison of Chang’s with Sorenson’s attenuation correction method by varying linear attenuation coefficient values in Tc-99m SPECT imaging
description Attenuation (scattering and absorption) of gamma photons in the patient’s body is one of the major limitations among the others in single photon emission computed tomography (SPECT). It reduces quantitative accuracy of measured radioactivity concentration and causes hot rim artifacts in reconstructed images if not corrected for. A variety of approximate attenuation correction methods has been developed or proposed by various groups to date,but all methods have some limitations. In this paper two attenuation correction methods have been investigated and compared. Data are acquired with both the collimators either LEGP or LEHR by scanning R. A. Carlson cylindrical phantom over 360o with an acrylic block of holes simulating hot regions of various sizes at different locations with respect to the walls of the phantom,which was filled with water and Tc-99m solution was uniformly distributed. Results show that the Chang’s attenuation correction method works better as compared to the Sorenson’s method in terms of the linearity in measured counts in hot regions. However, Chang’s method is sensitive with linear attenuation coefficient values and also gives higher standard deviation values particularly in smaller hot regions count density – with LEHR collimator data - compared to the Sorenson’s method.
format Book Chapter
author Sayed, Inayatullah Shah
Zakaria, Ahmed
Nik, Norhafiza
author_facet Sayed, Inayatullah Shah
Zakaria, Ahmed
Nik, Norhafiza
author_sort Sayed, Inayatullah Shah
title Comparison of Chang’s with Sorenson’s attenuation correction method by varying linear attenuation coefficient values in Tc-99m SPECT imaging
title_short Comparison of Chang’s with Sorenson’s attenuation correction method by varying linear attenuation coefficient values in Tc-99m SPECT imaging
title_full Comparison of Chang’s with Sorenson’s attenuation correction method by varying linear attenuation coefficient values in Tc-99m SPECT imaging
title_fullStr Comparison of Chang’s with Sorenson’s attenuation correction method by varying linear attenuation coefficient values in Tc-99m SPECT imaging
title_full_unstemmed Comparison of Chang’s with Sorenson’s attenuation correction method by varying linear attenuation coefficient values in Tc-99m SPECT imaging
title_sort comparison of chang’s with sorenson’s attenuation correction method by varying linear attenuation coefficient values in tc-99m spect imaging
publisher Springer-Verlag Berlin Heidelberg
publishDate 2008
url http://irep.iium.edu.my/5176/
http://irep.iium.edu.my/5176/
http://irep.iium.edu.my/5176/
http://irep.iium.edu.my/5176/4/Cover_page.pdf
http://irep.iium.edu.my/5176/1/Chang%27s_Vs_Sorenson_ATC_LNCS-FP_2008.pdf
http://irep.iium.edu.my/5176/5/Cover_book.pdf
first_indexed 2023-09-18T20:13:39Z
last_indexed 2023-09-18T20:13:39Z
_version_ 1777407643333165056

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