Cargando…

Quality Assessment of Computed Tomography Images using a Channelized Hoteling Observer: Optimization of Protocols in Clinical Practice

BACKGROUND: This study investigated the feasibility of channelized hoteling observer (CHO) model in computed tomography (CT) protocol optimization regarding the image quality and patient exposure. While the utility of using model observers such as to optimize the clinical protocol is evident, the pi...

Descripción completa

Detalles Bibliográficos
Autores principales: Choopani, Mohammad Reza, Abedi, Iraj, Dalvand, Fatemeh
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Wolters Kluwer - Medknow 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10012030/
https://www.ncbi.nlm.nih.gov/pubmed/36926443
http://dx.doi.org/10.4103/abr.abr_353_21
_version_ 1784906532968726528
author Choopani, Mohammad Reza
Abedi, Iraj
Dalvand, Fatemeh
author_facet Choopani, Mohammad Reza
Abedi, Iraj
Dalvand, Fatemeh
author_sort Choopani, Mohammad Reza
collection PubMed
description BACKGROUND: This study investigated the feasibility of channelized hoteling observer (CHO) model in computed tomography (CT) protocol optimization regarding the image quality and patient exposure. While the utility of using model observers such as to optimize the clinical protocol is evident, the pitfalls associated with the use of this method in practice require investigation. MATERIALS AND METHODS: This study was performed using variable tube current and adaptive statistical iterative reconstruction (ASIR) level (ASIR 10% to ASIR 100%). Various criteria including noise, high-contrast spatial resolution, CHOs model were used to compare image quality at different captured levels. For the implementation of CHO, we first tuned the model in a restricted dataset and then it to the evaluation of a large dataset of images obtained with different reconstruction ASIR and filtered back projection (FBP) levels. RESULTS: The results were promising in terms of CHO use for the stated purposes. Comparisons of the noise of reconstructed images with 30% ASIR and higher levels of noise in rebuilding images using the FBP approach showed a significant difference (P < 0.05). The spatial resolution obtained using various ASIR levels and tube currents were 0.8 pairs of lines per millimeter, which did not differ significantly from the FBP method (P > 0.05). CONCLUSIONS: Based on the results, using 80% ASIR can reduce the radiation dose on lungs, abdomen, and pelvis CT scans while maintaining image quality. Furthermore using ASIR 60% only for the reconstruction of lungs, abdomen, and pelvis images at standard radiation dose leads to optimal image quality.
format Online
Article
Text
id pubmed-10012030
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher Wolters Kluwer - Medknow
record_format MEDLINE/PubMed
spelling pubmed-100120302023-03-15 Quality Assessment of Computed Tomography Images using a Channelized Hoteling Observer: Optimization of Protocols in Clinical Practice Choopani, Mohammad Reza Abedi, Iraj Dalvand, Fatemeh Adv Biomed Res Original Article BACKGROUND: This study investigated the feasibility of channelized hoteling observer (CHO) model in computed tomography (CT) protocol optimization regarding the image quality and patient exposure. While the utility of using model observers such as to optimize the clinical protocol is evident, the pitfalls associated with the use of this method in practice require investigation. MATERIALS AND METHODS: This study was performed using variable tube current and adaptive statistical iterative reconstruction (ASIR) level (ASIR 10% to ASIR 100%). Various criteria including noise, high-contrast spatial resolution, CHOs model were used to compare image quality at different captured levels. For the implementation of CHO, we first tuned the model in a restricted dataset and then it to the evaluation of a large dataset of images obtained with different reconstruction ASIR and filtered back projection (FBP) levels. RESULTS: The results were promising in terms of CHO use for the stated purposes. Comparisons of the noise of reconstructed images with 30% ASIR and higher levels of noise in rebuilding images using the FBP approach showed a significant difference (P < 0.05). The spatial resolution obtained using various ASIR levels and tube currents were 0.8 pairs of lines per millimeter, which did not differ significantly from the FBP method (P > 0.05). CONCLUSIONS: Based on the results, using 80% ASIR can reduce the radiation dose on lungs, abdomen, and pelvis CT scans while maintaining image quality. Furthermore using ASIR 60% only for the reconstruction of lungs, abdomen, and pelvis images at standard radiation dose leads to optimal image quality. Wolters Kluwer - Medknow 2023-01-27 /pmc/articles/PMC10012030/ /pubmed/36926443 http://dx.doi.org/10.4103/abr.abr_353_21 Text en Copyright: © 2023 Advanced Biomedical Research https://creativecommons.org/licenses/by-nc-sa/4.0/This is an open access journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms.
spellingShingle Original Article
Choopani, Mohammad Reza
Abedi, Iraj
Dalvand, Fatemeh
Quality Assessment of Computed Tomography Images using a Channelized Hoteling Observer: Optimization of Protocols in Clinical Practice
title Quality Assessment of Computed Tomography Images using a Channelized Hoteling Observer: Optimization of Protocols in Clinical Practice
title_full Quality Assessment of Computed Tomography Images using a Channelized Hoteling Observer: Optimization of Protocols in Clinical Practice
title_fullStr Quality Assessment of Computed Tomography Images using a Channelized Hoteling Observer: Optimization of Protocols in Clinical Practice
title_full_unstemmed Quality Assessment of Computed Tomography Images using a Channelized Hoteling Observer: Optimization of Protocols in Clinical Practice
title_short Quality Assessment of Computed Tomography Images using a Channelized Hoteling Observer: Optimization of Protocols in Clinical Practice
title_sort quality assessment of computed tomography images using a channelized hoteling observer: optimization of protocols in clinical practice
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10012030/
https://www.ncbi.nlm.nih.gov/pubmed/36926443
http://dx.doi.org/10.4103/abr.abr_353_21
work_keys_str_mv AT choopanimohammadreza qualityassessmentofcomputedtomographyimagesusingachannelizedhotelingobserveroptimizationofprotocolsinclinicalpractice
AT abediiraj qualityassessmentofcomputedtomographyimagesusingachannelizedhotelingobserveroptimizationofprotocolsinclinicalpractice
AT dalvandfatemeh qualityassessmentofcomputedtomographyimagesusingachannelizedhotelingobserveroptimizationofprotocolsinclinicalpractice