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Evaluation of quality of images reconstructed from the data acquired in narrow (15%) and standard (20%) symmetrical energy window in conjunction with physical filter in tc-99m spect

Single Photon Emission Computed Tomography (SPECT) is a very useful medical imaging modality for detecting various diseases. However, relative to other medical imaging specialties, such as X-ray and Magnetic Resonance Imaging it has some limitations in terms of dgradation of image quality. Photopeak...

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Main Authors: Sayed, Inayatullah Shah, Zakaria, Nurul Nabilah, Syed, Waliullah Shah
Format: Conference or Workshop Item
Language:English
Published: 2022
Subjects:
QC Physics
Online Access:http://irep.iium.edu.my/101084/1/101084_Evaluation%20of%20quality%20of%20images%20reconstructed%20from%20the%20data%20acquired.pdf
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spelling my.iium.irep.1010842022-11-24T00:43:54Z http://irep.iium.edu.my/101084/ Evaluation of quality of images reconstructed from the data acquired in narrow (15%) and standard (20%) symmetrical energy window in conjunction with physical filter in tc-99m spect Sayed, Inayatullah Shah Zakaria, Nurul Nabilah Syed, Waliullah Shah QC Physics Single Photon Emission Computed Tomography (SPECT) is a very useful medical imaging modality for detecting various diseases. However, relative to other medical imaging specialties, such as X-ray and Magnetic Resonance Imaging it has some limitations in terms of dgradation of image quality. Photopeak energy window width and scatter radiation are the factors among others in SPECT imaging that affect the image quality. This study is aimed at evaluating the narrow (15%) and standard (20%) energy window data images with and without physical filter (Zinc (Zn) 0.2mm thick) as scatter radiation absorber. Philips ADAC/Forte dual head SPECT system was used. Carlson’s phantom consisting of cold and hot region inserts, filled with water was scanned. Tc-99m radionuclide (21mCi) was distributed homogeneously into the phantom. Data were acquired by setting 15% and 20% energy windows with and without physical filter. Images were reconstructed using filtered back projection technique with a Butterworth filter of cut-off frequency 0.35/cm and order 5. Chang’s attenuation correction method was applied using 0.12 and 0.13/cm linear attenuation coefficient (LAC) values. Reconstructed images were investigated both qualitatively and quantitatively. Cold and hot region image results indicated that the physical filter improved the contrast and SNR of narrow energy window data images with a 0.13/cm LAC value as compared to standard energy window data images. Furthermore, the detectability of smaller cold and hot regions was enhanced. In conclusion, the use of a physical filter with a narrow energy window provided improved image quality as compared to standard energy window data images. Therefore, it is suggested that further studies should be conducted for the implementation of physical filter technique with narrow energy window in clinical examinations. 2022-08-28 Conference or Workshop Item NonPeerReviewed application/pdf en http://irep.iium.edu.my/101084/1/101084_Evaluation%20of%20quality%20of%20images%20reconstructed%20from%20the%20data%20acquired.pdf Sayed, Inayatullah Shah and Zakaria, Nurul Nabilah and Syed, Waliullah Shah (2022) Evaluation of quality of images reconstructed from the data acquired in narrow (15%) and standard (20%) symmetrical energy window in conjunction with physical filter in tc-99m spect. In: 2nd International Conference on General Health Sciences (ICGeHeS), 25-28 August 2022, Istanbul, Turkey. (Unpublished)
institution Universiti Islam Antarabangsa Malaysia
building IIUM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider International Islamic University Malaysia
content_source IIUM Repository (IREP)
url_provider http://irep.iium.edu.my/
language English
topic QC Physics
spellingShingle QC Physics
Sayed, Inayatullah Shah
Zakaria, Nurul Nabilah
Syed, Waliullah Shah
Evaluation of quality of images reconstructed from the data acquired in narrow (15%) and standard (20%) symmetrical energy window in conjunction with physical filter in tc-99m spect
description Single Photon Emission Computed Tomography (SPECT) is a very useful medical imaging modality for detecting various diseases. However, relative to other medical imaging specialties, such as X-ray and Magnetic Resonance Imaging it has some limitations in terms of dgradation of image quality. Photopeak energy window width and scatter radiation are the factors among others in SPECT imaging that affect the image quality. This study is aimed at evaluating the narrow (15%) and standard (20%) energy window data images with and without physical filter (Zinc (Zn) 0.2mm thick) as scatter radiation absorber. Philips ADAC/Forte dual head SPECT system was used. Carlson’s phantom consisting of cold and hot region inserts, filled with water was scanned. Tc-99m radionuclide (21mCi) was distributed homogeneously into the phantom. Data were acquired by setting 15% and 20% energy windows with and without physical filter. Images were reconstructed using filtered back projection technique with a Butterworth filter of cut-off frequency 0.35/cm and order 5. Chang’s attenuation correction method was applied using 0.12 and 0.13/cm linear attenuation coefficient (LAC) values. Reconstructed images were investigated both qualitatively and quantitatively. Cold and hot region image results indicated that the physical filter improved the contrast and SNR of narrow energy window data images with a 0.13/cm LAC value as compared to standard energy window data images. Furthermore, the detectability of smaller cold and hot regions was enhanced. In conclusion, the use of a physical filter with a narrow energy window provided improved image quality as compared to standard energy window data images. Therefore, it is suggested that further studies should be conducted for the implementation of physical filter technique with narrow energy window in clinical examinations.
format Conference or Workshop Item
author Sayed, Inayatullah Shah
Zakaria, Nurul Nabilah
Syed, Waliullah Shah
author_facet Sayed, Inayatullah Shah
Zakaria, Nurul Nabilah
Syed, Waliullah Shah
author_sort Sayed, Inayatullah Shah
title Evaluation of quality of images reconstructed from the data acquired in narrow (15%) and standard (20%) symmetrical energy window in conjunction with physical filter in tc-99m spect
title_short Evaluation of quality of images reconstructed from the data acquired in narrow (15%) and standard (20%) symmetrical energy window in conjunction with physical filter in tc-99m spect
title_full Evaluation of quality of images reconstructed from the data acquired in narrow (15%) and standard (20%) symmetrical energy window in conjunction with physical filter in tc-99m spect
title_fullStr Evaluation of quality of images reconstructed from the data acquired in narrow (15%) and standard (20%) symmetrical energy window in conjunction with physical filter in tc-99m spect
title_full_unstemmed Evaluation of quality of images reconstructed from the data acquired in narrow (15%) and standard (20%) symmetrical energy window in conjunction with physical filter in tc-99m spect
title_sort evaluation of quality of images reconstructed from the data acquired in narrow (15%) and standard (20%) symmetrical energy window in conjunction with physical filter in tc-99m spect
publishDate 2022
url http://irep.iium.edu.my/101084/1/101084_Evaluation%20of%20quality%20of%20images%20reconstructed%20from%20the%20data%20acquired.pdf
http://irep.iium.edu.my/101084/
_version_ 1751535910403440640
score 13.211869

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