Focal necrotizing pneumonia is a distinct entity from lung abscess

Seo, Hyewon; Cha, Seung‐Ick; Shin, Kyung-Min; Lim, Jae‐Kwang; Yoo, Seung Soo; Lee, Jaehee; Lee, Shin-Yup; Kim, Chang‐Ho; Park, Jae Yong

doi:10.1111/resp.12124

Cited by 27 publications

(29 citation statements)

References 16 publications

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“…According to Hacimustafaoglu, NP is necrosis in pulmonary consolidation [15], and patchy areas without contrast in a CT scan [16]. Hyewon Seo et al pointed out that NP is distinct form lung abscess, with a characteristic performance of poorly defined foci of low density, and unassociated with enhancing margins in enhanced chest CT [17]. Our own experience indicated that it is very difficult to find necrotic lesions in unenhanced CT, so the standard protocol for NP in our hospital was to perform low dose enhanced CT. NP is currently diagnosed clinically and necrotic lesions are determined in CT images according to experience.…”

Section: Discussionmentioning

confidence: 99%

Image quality improvement using model-based iterative reconstruction in low dose chest CT for children with necrotizing pneumonia

Sun

Liu

et al. 2017

BMC Med Imaging

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BackgroundModel-based iterative reconstruction (MBIR) is a promising reconstruction method which could improve CT image quality with low radiation dose. The purpose of this study was to demonstrate the advantage of using MBIR for noise reduction and image quality improvement in low dose chest CT for children with necrotizing pneumonia, over the adaptive statistical iterative reconstruction (ASIR) and conventional filtered back-projection (FBP) technique.MethodsTwenty-six children with necrotizing pneumonia (aged 2 months to 11 years) who underwent standard of care low dose CT scans were included. Thinner-slice (0.625 mm) images were retrospectively reconstructed using MBIR, ASIR and conventional FBP techniques. Image noise and signal-to-noise ratio (SNR) for these thin-slice images were measured and statistically analyzed using ANOVA. Two radiologists independently analyzed the image quality for detecting necrotic lesions, and results were compared using a Friedman’s test.ResultsRadiation dose for the overall patient population was 0.59 mSv. There was a significant improvement in the high-density and low-contrast resolution of the MBIR reconstruction resulting in more detection and better identification of necrotic lesions (38 lesions in 0.625 mm MBIR images vs. 29 lesions in 0.625 mm FBP images). The subjective display scores (mean ± standard deviation) for the detection of necrotic lesions were 5.0 ± 0.0, 2.8 ± 0.4 and 2.5 ± 0.5 with MBIR, ASIR and FBP reconstruction, respectively, and the respective objective image noise was 13.9 ± 4.0HU, 24.9 ± 6.6HU and 33.8 ± 8.7HU. The image noise decreased by 58.9 and 26.3% in MBIR images as compared to FBP and ASIR images. Additionally, the SNR of MBIR images was significantly higher than FBP images and ASIR images.ConclusionsThe quality of chest CT images obtained by MBIR in children with necrotizing pneumonia was significantly improved by the MBIR technique as compared to the ASIR and FBP reconstruction, to provide a more confident and accurate diagnosis for necrotizing pneumonia.

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Section: Discussionmentioning

confidence: 99%

Image quality improvement using model-based iterative reconstruction in low dose chest CT for children with necrotizing pneumonia

Sun

Liu

et al. 2017

BMC Med Imaging

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“…Prompt identification of aspiration risk among patients with pneumonia may predict a poorer outcome. Finally, Seo H et al 23 described the clinical characteristics and clinical course of patients with focal necrotizing pneumonia as a distinct entity from lung abscess. 'Focal necrotizing pneumonia' was defined as a localized type of necrotizing pneumonia characterized by a single or few cavities of low density without rim enhancement on CT scan.…”

Section: Pneumonia Phenotypesmentioning

confidence: 99%

Year in review 2013: Lung cancer, respiratory infections, tuberculosis, cystic fibrosis, pleural diseases, bronchoscopic intervention and imaging

et al. 2014

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“…CAVITARY lung lesions are defined as circumscribed air-filled areas in lung parenchyma, which may be induced by group of lung infections and necrotizing pneumonia which are characterized with multiple abscesses [1,2] .…”

Section: Introductionmentioning

confidence: 99%

Role of Multi-Detector Computed Tomography in Differentiation between Benign & Malignant Cavitary Lung Lesions

Sherif¹,

Taha

2019

The Medical Journal of Cairo University

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Background: In patients with cavitary lung diseases, it is crucial to detect the lesion for determining adequate treatment. Multislice CT in combination with other radiologic images is currently regarded as the most appropriate diagnostic imaging for differentiation between benign and malignant cavitary lung lesions. Aim of Study: To evaluate the role of multi-detector computed tomography in differentiation between benign & malignant cavitary lung lesions. Material and Methods: The present study included 60 patients with cavitary lung lesions. They were 46 males and 14 females. Their ages ranged l5 years and 83 years with their mean age of 50 years old. All patients were subjected to radiological examination including chest X-ray and 16 slice MDCT scanner. Results: In this study there were 10 patients with airway diseases, 35 patients with infective lesions, and another 15 patients with tumors. The diagnosis was confirmed by (clinical follow-up, needle biopsy or bronchoscopy). In our study, 2 cases had false positive results by CT and one case had false negative results by CT, multislice computed tomography showed sensitivity of 91%, specificity of 88%, and accuracy of 87%. Conclusion: MDCT is superior to plain X-ray in demonstrating the cavitary lung lesions with higher degree of clarity. It can define the exact anatomical site of the cavity, characterization of the cavitary wall and abnormalities in the surrounding lung parenchyma. It is reliable in detecting lesions in areas difficult to visualize by plain X-ray.

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Focal necrotizing pneumonia is a distinct entity from lung abscess

Abstract: Compared to lung abscess, focal necrotizing pneumonia occurs more commonly in non-gravity-dependent segments with lower incidence of risk factors for aspiration. Similar to lung abscess, the rate of success for treatment of focal necrotizing pneumonia was high.

Cited by 27 publications

References 16 publications

Image quality improvement using model-based iterative reconstruction in low dose chest CT for children with necrotizing pneumonia

Image quality improvement using model-based iterative reconstruction in low dose chest CT for children with necrotizing pneumonia

Year in review 2013: Lung cancer, respiratory infections, tuberculosis, cystic fibrosis, pleural diseases, bronchoscopic intervention and imaging

Role of Multi-Detector Computed Tomography in Differentiation between Benign & Malignant Cavitary Lung Lesions

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