A phantom study for ground-glass nodule detectability using chest digital tomosynthesis with iterative reconstruction algorithm by ten observers: association with radiation dose and nodular characteristics

Miyata, Katsunori; Nagatani, Yukihiro; Ikeda, Mitsuru; Takahashi, Masashi; Nitta, Norihisa; Matsuo, Shoichiro; Ohta, Shin‐ichi; Otani, Hideji; Nitta-Seko, Ayumi; Murakami, Yoko; Tsuchiya, Keiko; Inoue, Akitoshi; Misaki, Sayaka; Erdenee, Khishigdorj; Kida, Tetsuo; Murata, Kiyoshi

doi:10.1259/bjr.20160555

Cited by 9 publications

(5 citation statements)

References 34 publications

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“…According to published reports, common CT ndings consist of bilateral patchy ground glass opacities with peripheral predominance [20]. However, according to Fisher's exact probability test, there was no statistically signi cant difference between DTS and CT [21] in the diagnosis of ground glass opacities of COVID-19 pneumonia (P> 0.05) [22].…”

Section: Chest Ct Examinationmentioning

confidence: 96%

"Multimodal" Imaging Performance and Clinical Application of Coronavirus Disease 2019 (COVID-19)

Li¹,

Zhou²,

Li³

et al. 2020

Preprint

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Background: To investigate the diagnostic value of three different examination methods of chest radiography (CXR), digital tomosynthesis (DTS) and Computed tomography (CT) scan on the diagnosis of novel coronavirus pneumonia (COVID-19).Methods: A retrospective analysis of three examination methods of chest: CXR, DTS, and CT scan of COVID-19 pneumonia patients diagnosed in our hospital from January, 23, 2020 to February, 29, 2020. And we compared three different imaging methods to COVID-19 display ability of pneumonia intrapulmonary lesions.Results: A total of 37 patients diagnosed as COVID-19 by nucleic acid testing were included. The CXR group (10/37) and DTS group (21/28) of 37 patients with COVID-19 pneumonia showed significant differences in intrapulmonary ground glass opacities (P<0.05); DTS group (21/28) and CT group (25/27) showed no statistically significant differences in intrapulmonary ground glass opacities (P> 0.05). Conclusion: Comparison of the three imaging methods of COVID-19 pneumonia, the diagnostic efficiency of CXR is low, which is easy to be false negative and miss lesions; diagnostic resolutions of DTS are higher than CXR, which can improve the ability to display the fine structure of intrapulmonary lesions; CT scan shows the intrapulmonary of COVID-19 pneumonia low-density ground glass opacities and internal structures have equal capacity compared with DTS. Therefore, DTS and CT are the best choices for the image diagnosis of COVID-19 pneumonia.

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Section: Chest Ct Examinationmentioning

confidence: 96%

"Multimodal" Imaging Performance and Clinical Application of Coronavirus Disease 2019 (COVID-19)

Li¹,

Zhou²,

Li³

et al. 2020

Preprint

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“…Однако при обследовании детей и подростков томосинтез до сих пор применяют довольно узко. [19,20]. Эти сведения ценны при сравнении диагностической значимости методики и новых протоколов МСКТ с минимальной дозой: так, использование томосинтеза для оценки успешности реабилитации запястья после травмы обеспечило почти 28-кратное снижение лучевой нагрузки на пациента [21].…”

Section: характеристика методики томосинтезаunclassified

Tomosynthesis in pediatrics: a retrospective of its application in the world practice and own data

Simonovskaya

Юрьевна²,

Sholokhova

et al. 2021

Journal of Clinical Practice

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Tomosynthesis is a modern effective and informative method of low-dose X-ray diagnostics, which allows obtaining a significant number of layered images with the subsequent volumetric image reconstruction. The use of tomosynthesis provides a one-time examination of a large anatomical area without loss of the image quality and diagnostics of difficult-to-visualize pathological changes that are not detected by digital radiography. The article presents an overview of the problem of improving low-dose imaging options in the radiation diagnostics, as well as the authors own data on the use of tomosynthesis for the diagnosis of community-acquired pneumonia in children.

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“…A challenge when using the CDT system is to develop reconstruction methods because of the limited projection views within various angular ranges. Recently, filtered-backproejction (FBP) and various types of tomosynthesis reconstruction methods have been studied [10][11][12][13][14][15][16][17][18]. Although there has been interest in developing of reconstruction methods for tomosynthesis system, most studies were distributed for breast tomosynthesis [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Investigation of various reconstruction parameters for algebraic reconstruction technique in a newly developed chest digital tomosynthesis

et al. 2017

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A: Chest digital tomosynthesis (CDT) is a promising new modality that provides 3D information by reconstructing limited projection views. CDT systems have been developed to improve the limitations of conventional radiography such as image degradation and low sensitivity. However, the development of reconstruction methods is challenging because of the limited projection views within various angular ranges. Optimization of reconstruction parameters for various reconsturction methods in CDT system also is needed. The purpose of this study was to investigate the feasibility of algebraic reconstruction technique (ART) method, and to evaluate the effect of the reconstruction parameters for our newly developed CDT system. We designed ART method with 41 projection views over an angular range of ±20°. To investigate the effect of reconstruction parameters, we measured the contrast-to-noise ratio (CNR), artifact spread function (ASF), and quality factor (QF) using LUNGMAN phantom included tumors. We found that the proper choice of reconstruction parameters such as relaxation parameter, initial guess, and number of iterations improved the quality of reconstructed images from the same projection views. Optimal values of ART relaxation parameter with uniform (UI) and back-projection (BP) initial guesses were 0.4 and 0.6, respectively. BP initial guess improved image quality in comparison with UI initial guess, in terms of providing a higher CNR and QF values with a faster speed. CNR and QF values improved with increasing number of iteration. Particularly, ART method with BP initial guess (when β = 0.6) after 3-terations provide satisfactory reconstructed image. In conclusion, the use of ART method with proper reconstruction parameters provided better image quality than FBP method as well as conventional radiography. These results indicated that the ART method with optimal reconstruction parameters could improve image quality for nodule detection using the CDT system. K: Image reconstruction in medical imaging; Computerized Tomography (CT) and Computed Radiography (CR)

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A phantom study for ground-glass nodule detectability using chest digital tomosynthesis with iterative reconstruction algorithm by ten observers: association with radiation dose and nodular characteristics

Abstract: Nitta N, Matsuo S, et al. A phantom study for ground-glass nodule detectability using chest digital tomosynthesis with iterative reconstruction algorithm by ten observers: association with radiation dose and nodular characteristics. Br J Radiol 2017; 90: 20160555.

Cited by 9 publications

References 34 publications

"Multimodal" Imaging Performance and Clinical Application of Coronavirus Disease 2019 (COVID-19)

"Multimodal" Imaging Performance and Clinical Application of Coronavirus Disease 2019 (COVID-19)

Tomosynthesis in pediatrics: a retrospective of its application in the world practice and own data

Investigation of various reconstruction parameters for algebraic reconstruction technique in a newly developed chest digital tomosynthesis

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