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Effect of iterative reconstruction algorithm levels on noise index and figure-of-merit in CT pulmonary angiography examinations

PURPOSE: To evaluate the influence of iterative reconstruction (IR) levels on Computed Tomography (CT) image quality and to establish Figure of Merit (FOM) value for CT Pulmonary Angiography (CTPA) examinations. METHODS: Images of 31 adult patients who underwent CTPA examinations in our institution...

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Main Authors: Haspiharun, Hanif, Abdul Karim, Muhammad Khalis, Abbas, Zulkifly, Sabarudin, Akmal, Muniandy, S. C., Ibrahim, M. J.
Format: Article
Language:English
Published: IOS Press 2020
Online Access:http://psasir.upm.edu.my/id/eprint/88613/1/ABSTRACT.pdf
http://psasir.upm.edu.my/id/eprint/88613/
https://content.iospress.com/articles/journal-of-x-ray-science-and-technology/xst200699
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spelling my.upm.eprints.886132021-12-14T22:45:21Z http://psasir.upm.edu.my/id/eprint/88613/ Effect of iterative reconstruction algorithm levels on noise index and figure-of-merit in CT pulmonary angiography examinations Haspiharun, Hanif Abdul Karim, Muhammad Khalis Abbas, Zulkifly Sabarudin, Akmal Muniandy, S. C. Ibrahim, M. J. PURPOSE: To evaluate the influence of iterative reconstruction (IR) levels on Computed Tomography (CT) image quality and to establish Figure of Merit (FOM) value for CT Pulmonary Angiography (CTPA) examinations. METHODS: Images of 31 adult patients who underwent CTPA examinations in our institution from March to April 2019 were retrospectively collected. Other data, such as scanning parameters, radiation dose and body habitus information from the subjects were also recorded. Six different levels of IR were applied to the volume data of the subjects. Five circles of the region of interest (ROI) were drawn in five different arteries namely, pulmonary trunk, right pulmonary artery, left pulmonary artery, ascending aorta and descending aorta. The mean Signal-to-noise ratio (SNR) was obtained, and the FOM was calculated in a fraction of the SNR2 divided by volume-weighted CT dose index (CTDIvol) and SNR2 divided by the size-specific dose estimates (SSDE). RESULTS: Overall, we observed that the mean value of CTDIvol and SSDE were 13.79±7.72 mGy and 17.25±8.92 mGy, respectively. Notably, SNR values significantly increase with increase of the IR level (p < 0.05). There are also significant differences (p < 0.05) in the FOM for both SNR2/SSDE and SNR2/CTDIvol attained in different IR levels. CONCLUSION: We successfully evaluate the value of radiation dose and image quality performance and set up a figure of merit for both parameters to further verify scanning protocols by radiology personnel. IOS Press 2020 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/88613/1/ABSTRACT.pdf Haspiharun, Hanif and Abdul Karim, Muhammad Khalis and Abbas, Zulkifly and Sabarudin, Akmal and Muniandy, S. C. and Ibrahim, M. J. (2020) Effect of iterative reconstruction algorithm levels on noise index and figure-of-merit in CT pulmonary angiography examinations. Journal of X-Ray Science and Technology, 28 (5). 893 - 903. ISSN 0895-3996; ESSN: 1095-9114 https://content.iospress.com/articles/journal-of-x-ray-science-and-technology/xst200699 10.3233/XST-200699
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description PURPOSE: To evaluate the influence of iterative reconstruction (IR) levels on Computed Tomography (CT) image quality and to establish Figure of Merit (FOM) value for CT Pulmonary Angiography (CTPA) examinations. METHODS: Images of 31 adult patients who underwent CTPA examinations in our institution from March to April 2019 were retrospectively collected. Other data, such as scanning parameters, radiation dose and body habitus information from the subjects were also recorded. Six different levels of IR were applied to the volume data of the subjects. Five circles of the region of interest (ROI) were drawn in five different arteries namely, pulmonary trunk, right pulmonary artery, left pulmonary artery, ascending aorta and descending aorta. The mean Signal-to-noise ratio (SNR) was obtained, and the FOM was calculated in a fraction of the SNR2 divided by volume-weighted CT dose index (CTDIvol) and SNR2 divided by the size-specific dose estimates (SSDE). RESULTS: Overall, we observed that the mean value of CTDIvol and SSDE were 13.79±7.72 mGy and 17.25±8.92 mGy, respectively. Notably, SNR values significantly increase with increase of the IR level (p < 0.05). There are also significant differences (p < 0.05) in the FOM for both SNR2/SSDE and SNR2/CTDIvol attained in different IR levels. CONCLUSION: We successfully evaluate the value of radiation dose and image quality performance and set up a figure of merit for both parameters to further verify scanning protocols by radiology personnel.
format Article
author Haspiharun, Hanif
Abdul Karim, Muhammad Khalis
Abbas, Zulkifly
Sabarudin, Akmal
Muniandy, S. C.
Ibrahim, M. J.
spellingShingle Haspiharun, Hanif
Abdul Karim, Muhammad Khalis
Abbas, Zulkifly
Sabarudin, Akmal
Muniandy, S. C.
Ibrahim, M. J.
Effect of iterative reconstruction algorithm levels on noise index and figure-of-merit in CT pulmonary angiography examinations
author_facet Haspiharun, Hanif
Abdul Karim, Muhammad Khalis
Abbas, Zulkifly
Sabarudin, Akmal
Muniandy, S. C.
Ibrahim, M. J.
author_sort Haspiharun, Hanif
title Effect of iterative reconstruction algorithm levels on noise index and figure-of-merit in CT pulmonary angiography examinations
title_short Effect of iterative reconstruction algorithm levels on noise index and figure-of-merit in CT pulmonary angiography examinations
title_full Effect of iterative reconstruction algorithm levels on noise index and figure-of-merit in CT pulmonary angiography examinations
title_fullStr Effect of iterative reconstruction algorithm levels on noise index and figure-of-merit in CT pulmonary angiography examinations
title_full_unstemmed Effect of iterative reconstruction algorithm levels on noise index and figure-of-merit in CT pulmonary angiography examinations
title_sort effect of iterative reconstruction algorithm levels on noise index and figure-of-merit in ct pulmonary angiography examinations
publisher IOS Press
publishDate 2020
url http://psasir.upm.edu.my/id/eprint/88613/1/ABSTRACT.pdf
http://psasir.upm.edu.my/id/eprint/88613/
https://content.iospress.com/articles/journal-of-x-ray-science-and-technology/xst200699
_version_ 1720438538328080384
score 13.211869

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