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感兴趣区（ROI）大小对CT中基于计算体模和美国放射学会（ACR）体模的噪声测量准确性的影响

Impact of ROI Size on the Accuracy of Noise Measurement in CT on Computational and ACR Phantoms.

作者信息

Anam Choirul, Triadyaksa Pandji, Naufal Ariij, Arifin Zaenal, Muhlisin Zaenul, Setiawati Evi, Budi Wahyu Setia

机构信息

PhD, Department of Physics, Faculty of Sciences and Mathematics, Diponegoro University, Jl. Prof. Soedarto SH, Tembalang, Semarang 50275, Central Java, Indonesia.

MSc, Department of Physics, Faculty of Sciences and Mathematics, Diponegoro University, Jl. Prof. Soedarto SH, Tembalang, Semarang 50275, Central Java, Indonesia.

出版信息

J Biomed Phys Eng. 2022 Aug 1;12(4):359-368. doi: 10.31661/jbpe.v0i0.2202-1457. eCollection 2022 Aug.

DOI:10.31661/jbpe.v0i0.2202-1457
PMID:36059282
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9395624/
Abstract

BACKGROUND

The effect of region of interest (ROI) size variation on producing accurate noise levels is not yet studied.

OBJECTIVE

This study aimed to evaluate the influence of ROI sizes on the accuracy of noise measurement in computed tomography (CT) by using images of a computational and American College of Radiology (ACR) phantoms.

MATERIAL AND METHODS

In this experimental study, two phantoms were used, including computational and ACR phantoms. A computational phantom was developed by using Matlab R215a software (Mathworks Inc., Natick, MA Natick, MA) with a homogeneously +100 Hounsfield Unit (HU) value and an added-Gaussian noise with various levels of 5, 10, 25, 50, 75, and 100 HU. The ACR phantom was scanned with a Philips MX-16 slice CT scanner in different slice thicknesses of 1.5, 3, 5, and 7 mm to obtain noise variation. Noise measurement was conducted at the center of the phantom images and four locations close to the edge of the phantom images using different ROI sizes from 3 × 3 to 41 × 41 pixels, with an increased size of 2 × 2 pixels.

RESULTS

The use of a minimum ROI size of 21 × 21 pixels shows noise in the range of ± 5% ground truth noise. The measured noise increases above the ± 5% range if the used ROI is smaller than 21 × 21 pixels.

CONCLUSION

A minimum acceptable ROI size is required to maintain the accuracy of noise measurement with a size of 21 × 21 pixels.

摘要

背景

感兴趣区域（ROI）大小变化对产生准确噪声水平的影响尚未得到研究。

目的

本研究旨在通过使用计算体模和美国放射学会（ACR）体模的图像，评估ROI大小对计算机断层扫描（CT）中噪声测量准确性的影响。

材料与方法

在本实验研究中，使用了两种体模，包括计算体模和ACR体模。使用Matlab R215a软件（Mathworks公司，马萨诸塞州纳蒂克）开发了一个计算体模，其均匀值为+100亨氏单位（HU），并添加了水平分别为5、10、25、50、75和100 HU的高斯噪声。使用飞利浦MX - 16层CT扫描仪对ACR体模进行扫描，扫描层厚分别为1.5、3、5和7 mm，以获得噪声变化情况。在体模图像的中心以及靠近体模图像边缘的四个位置进行噪声测量，使用从3×3到41×41像素的不同ROI大小，每次增加2×2像素。

结果

使用最小ROI大小为21×21像素时，噪声在真实噪声的±5%范围内。如果使用的ROI小于21×21像素，测量的噪声会增加到±5%范围以上。

结论

需要一个最小可接受的ROI大小来保持噪声测量的准确性，其大小为21×21像素。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/422c/9395624/ede39513e9f3/JBPE-12-359-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/422c/9395624/2fd8c933f1f5/JBPE-12-359-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/422c/9395624/3b6cb5c29823/JBPE-12-359-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/422c/9395624/5119a29c67da/JBPE-12-359-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/422c/9395624/3bb326ed1d81/JBPE-12-359-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/422c/9395624/1d99e0a32bf0/JBPE-12-359-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/422c/9395624/ede39513e9f3/JBPE-12-359-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/422c/9395624/2fd8c933f1f5/JBPE-12-359-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/422c/9395624/3b6cb5c29823/JBPE-12-359-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/422c/9395624/5119a29c67da/JBPE-12-359-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/422c/9395624/3bb326ed1d81/JBPE-12-359-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/422c/9395624/1d99e0a32bf0/JBPE-12-359-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/422c/9395624/ede39513e9f3/JBPE-12-359-g006.jpg

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Phys Med Biol. 2018 Dec 14;63(24):245018. doi: 10.1088/1361-6560/aaf0b4.
4
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J Appl Clin Med Phys. 2018 Nov;19(6):244-252. doi: 10.1002/acm2.12476. Epub 2018 Oct 19.
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7
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Med Phys. 2018 May;45(5):1889-1898. doi: 10.1002/mp.12847. Epub 2018 Mar 23.
8
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9
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J Appl Clin Med Phys. 2017 Nov;18(6):224-231. doi: 10.1002/acm2.12186. Epub 2017 Sep 18.
10
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