Improving decomposition image quality in dual-energy chest radiography using two-dimensional crisscrossed anti-scatter grid

IF 3.2 2区医学 Q1 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Medical physics Pub Date : 2025-04-11 DOI:10.1002/mp.17819

Duhee Jeon, Younghwan Lim, Hyesun Yang, Myeongkyu Park, Kyong-Woo Kim, Hyosung Cho

{"title":"Improving decomposition image quality in dual-energy chest radiography using two-dimensional crisscrossed anti-scatter grid","authors":"Duhee Jeon, Younghwan Lim, Hyesun Yang, Myeongkyu Park, Kyong-Woo Kim, Hyosung Cho","doi":"10.1002/mp.17819","DOIUrl":null,"url":null,"abstract":"<div>\n \n \n <section>\n \n <h3> Background</h3>\n \n <p>Chest radiography is a widely used medical imaging modality for diagnosing chest-related diseases. However, anatomical structure overlap hinders accurate lesion detection. While the dual-energy x-ray imaging technique addresses this issue by separating soft-tissue and bone images from an original chest radiograph, scattered radiation remains a significant challenge in decomposition image quality.</p>\n </section>\n \n <section>\n \n <h3> Purpose</h3>\n \n <p>This work aims to conduct dual-energy material decomposition (DEMD) in chest radiography using a two-dimensional (2D) crisscrossed anti-scatter grid to improve decomposition image quality by effectively removing scattered radiation.</p>\n </section>\n \n <section>\n \n <h3> Methods</h3>\n \n <p>A 2D graphite-interspaced grid with a strip density of <i>N</i> = 1.724 lines/mm and grid ratio <i>r</i> = 6:1 was fabricated using a high-precision sawing process. The grid characteristics were evaluated using the IEC standard fixture. A 2D-grid-based DEMD process, which involves the acquisition of low- and high-kV radiographs with a 2D grid, generation of a pairwise decomposition function using a calibration wedge phantom, and decomposition of soft-tissue and bone images using the decomposition function, was implemented, followed by software-based grid artifact reduction. Experiments were conducted on a commercially available chest phantom using an x-ray imaging system operating at two tube voltages of 70 and 120 kVp. The decomposition image quality of the proposed DEMD and conventional dual-energy subtraction methods was compared for the cases of no grid, software-based scatter correction, 1D grid (<i>N = </i>8.475 lines/mm and <i>r</i> = 12:1), and 2D grid.</p>\n </section>\n \n <section>\n \n <h3> Results</h3>\n \n <p>The 2D grid demonstrated superior scatter radiation removal ability with scatter radiation transmission of 6.34% and grid selectivity of 9.67, representing a 2.6-fold decrease and a 2.7-fold improvement over the 1D grid, respectively. Compared to other competitive methods, the 2D-grid-based DEMD method considerably improved decomposition image quality, with improved lung structure visibility in selective soft-tissue images.</p>\n </section>\n \n <section>\n \n <h3> Conclusions</h3>\n \n <p>The proposed DEMD method yielded high-quality dual-energy chest radiographs by effectively removing scattered radiation, demonstrating significant potential for improving lesion detection in clinical practice.</p>\n </section>\n </div>","PeriodicalId":18384,"journal":{"name":"Medical physics","volume":"52 7","pages":""},"PeriodicalIF":3.2000,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mp.17819","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Medical physics","FirstCategoryId":"3","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/mp.17819","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING","Score":null,"Total":0}

引用次数: 0

Abstract

Background

Chest radiography is a widely used medical imaging modality for diagnosing chest-related diseases. However, anatomical structure overlap hinders accurate lesion detection. While the dual-energy x-ray imaging technique addresses this issue by separating soft-tissue and bone images from an original chest radiograph, scattered radiation remains a significant challenge in decomposition image quality.

Purpose

This work aims to conduct dual-energy material decomposition (DEMD) in chest radiography using a two-dimensional (2D) crisscrossed anti-scatter grid to improve decomposition image quality by effectively removing scattered radiation.

Methods

A 2D graphite-interspaced grid with a strip density of N = 1.724 lines/mm and grid ratio r = 6:1 was fabricated using a high-precision sawing process. The grid characteristics were evaluated using the IEC standard fixture. A 2D-grid-based DEMD process, which involves the acquisition of low- and high-kV radiographs with a 2D grid, generation of a pairwise decomposition function using a calibration wedge phantom, and decomposition of soft-tissue and bone images using the decomposition function, was implemented, followed by software-based grid artifact reduction. Experiments were conducted on a commercially available chest phantom using an x-ray imaging system operating at two tube voltages of 70 and 120 kVp. The decomposition image quality of the proposed DEMD and conventional dual-energy subtraction methods was compared for the cases of no grid, software-based scatter correction, 1D grid (N = 8.475 lines/mm and r = 12:1), and 2D grid.

Results

The 2D grid demonstrated superior scatter radiation removal ability with scatter radiation transmission of 6.34% and grid selectivity of 9.67, representing a 2.6-fold decrease and a 2.7-fold improvement over the 1D grid, respectively. Compared to other competitive methods, the 2D-grid-based DEMD method considerably improved decomposition image quality, with improved lung structure visibility in selective soft-tissue images.

Conclusions

The proposed DEMD method yielded high-quality dual-energy chest radiographs by effectively removing scattered radiation, demonstrating significant potential for improving lesion detection in clinical practice.

Abstract Image

查看原文本刊更多论文

利用二维交叉抗散射网格提高双能胸片分解图像质量。

背景：胸部x线摄影是诊断胸部相关疾病的一种广泛使用的医学成像方式。然而，解剖结构重叠阻碍了准确的病变检测。虽然双能x线成像技术通过从原始胸片中分离软组织和骨骼图像来解决这一问题，但散射辐射在分解图像质量方面仍然是一个重大挑战。目的：本工作旨在利用二维（2D）交叉抗散射网格对胸片进行双能物质分解（DEMD），通过有效去除散射辐射来提高分解图像质量。方法：采用高精度锯切工艺制备石墨间距栅格，栅格密度N = 1.724 lines/mm，栅格比r = 6:1。使用IEC标准夹具对网格特性进行了评估。实现了基于2D网格的DEMD过程，该过程包括使用2D网格获取低千伏和高千伏x线照片，使用校准楔形幻影生成两两分解函数，使用分解函数分解软组织和骨骼图像，然后使用基于软件的网格伪影减少。实验在市售的胸廓上进行，使用x射线成像系统在70和120 kVp两个管电压下工作。在无网格、基于软件的散点校正、一维网格（N = 8.475 lines/mm, r = 12:1）和二维网格情况下，比较了所提出的DEMD与传统双能量减法的分解图像质量。结果：二维网格具有较强的散射辐射去除能力，散射辐射透射率为6.34%，网格选择性为9.67，分别比一维网格降低2.6倍和提高2.7倍。与其他竞争方法相比，基于2d网格的DEMD方法显著提高了分解图像的质量，在选择性软组织图像中提高了肺结构的可见性。结论：本文提出的DEMD方法可有效去除散射辐射，获得高质量的双能胸片，在临床实践中具有提高病变检测的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Medical physics 医学-核医学

CiteScore

6.80

自引率

15.80%

发文量

660

审稿时长

1.7 months

期刊介绍： Medical Physics publishes original, high impact physics, imaging science, and engineering research that advances patient diagnosis and therapy through contributions in 1) Basic science developments with high potential for clinical translation 2) Clinical applications of cutting edge engineering and physics innovations 3) Broadly applicable and innovative clinical physics developments Medical Physics is a journal of global scope and reach. By publishing in Medical Physics your research will reach an international, multidisciplinary audience including practicing medical physicists as well as physics- and engineering based translational scientists. We work closely with authors of promising articles to improve their quality.