Lung nodule localization and size estimation on chest tomosynthesis.

IF 1.9 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Journal of Medical Imaging Pub Date : 2025-01-01 Epub Date: 2024-10-28 DOI:10.1117/1.JMI.12.S1.S13007
Micael Oliveira Diniz, Mohammad Khalil, Erika Fagman, Jenny Vikgren, Faiz Haj, Angelica Svalkvist, Magnus Båth, Åse Allansdotter Johnsson
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Abstract

Purpose: We aim to investigate the localization, visibility, and measurement of lung nodules in digital chest tomosynthesis (DTS).

Approach: Computed tomography (CT), maximum intensity projections (CT-MIP) (transaxial versus coronal orientation), and computer-aided detection (CAD) were used as location reference, and inter- and intra-observer agreement regarding lung nodule size was assessed. Five radiologists analyzed DTS and CT images from 24 participants with lung nodules 100    mm 3 , focusing on lung nodule localization, visibility, and measurement on DTS. Visual grading was used to compare if coronal or transaxial CT-MIP better facilitated the localization of lung nodules in DTS.

Results: The majority of the lung nodules (79%) were rated as visible in DTS, although less clearly in comparison with CT. Coronal CT-MIP was the preferred orientation in the task of locating nodules on DTS. On DTS, area-based lung nodule size estimates resulted in significantly less measurement variability when compared with nodule size estimated based on mean diameter (mD) ( p < 0.05 ). Also, on DTS, area-based lung nodule size estimates were more accurate ( SEE = 38.7    mm 3 ) than lung nodule size estimates based on mean diameter ( SEE = 42.7    mm 3 ).

Conclusions: Coronal CT-MIP images are superior to transaxial CT-MIP images in facilitating lung nodule localization in DTS. Most nodules 100    mm 3 found on CT can be visualized, correctly localized, and measured in DTS, and area-based measurement may be the key to more precise and less variable nodule measurements on DTS.

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胸部断层扫描的肺结节定位和大小估计。
目的:我们旨在研究数字胸部断层扫描(DTS)中肺结节的定位、可见性和测量方法:方法:使用计算机断层扫描(CT)、最大强度投影(CT-MIP)(横轴向与冠状向)和计算机辅助检测(CAD)作为定位参考,并评估观察者之间和观察者内部关于肺结节大小的一致性。五位放射科医生分析了 24 位肺部结节≥ 100 mm 3 的参试者的 DTS 和 CT 图像,重点是肺部结节的定位、可见度和 DTS 的测量。采用目视分级法比较冠状位或经轴位 CT-MIP 是否更有利于 DTS 中肺部结节的定位:大多数肺结节(79%)在 DTS 中被评为可见,但与 CT 相比,其清晰度较低。在 DTS 上定位结节时,冠状 CT-MIP 是首选方向。在 DTS 上,与根据平均直径 (mD) 估算的结节大小相比,根据面积估算的肺结节大小的测量变异性要小得多(P 0.05)。此外,在 DTS 上,基于面积的肺结节大小估计值(SEE = 38.7 mm 3)比基于平均直径的肺结节大小估计值(SEE = 42.7 mm 3)更准确:结论:冠状 CT-MIP 图像在促进 DTS 肺结节定位方面优于经轴 CT-MIP 图像。在 CT 上发现的≥ 100 mm 3 的大多数结节都能在 DTS 中被观察到、正确定位和测量,而基于面积的测量可能是在 DTS 中更精确、更少变化的结节测量的关键。
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来源期刊
Journal of Medical Imaging
Journal of Medical Imaging RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING-
CiteScore
4.10
自引率
4.20%
发文量
0
期刊介绍: JMI covers fundamental and translational research, as well as applications, focused on medical imaging, which continue to yield physical and biomedical advancements in the early detection, diagnostics, and therapy of disease as well as in the understanding of normal. The scope of JMI includes: Imaging physics, Tomographic reconstruction algorithms (such as those in CT and MRI), Image processing and deep learning, Computer-aided diagnosis and quantitative image analysis, Visualization and modeling, Picture archiving and communications systems (PACS), Image perception and observer performance, Technology assessment, Ultrasonic imaging, Image-guided procedures, Digital pathology, Biomedical applications of biomedical imaging. JMI allows for the peer-reviewed communication and archiving of scientific developments, translational and clinical applications, reviews, and recommendations for the field.
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