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General Thoracic and Cardiovascular Surgery

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Open Access 01-07-2012 | Original Article

One-dimensional mean computed tomography value evaluation of ground-glass opacity on high-resolution images

Authors: Akihiko Kitami, Yoshito Kamio, Shoko Hayashi, Kosuke Suzuki, Shugo Uematsu, Ryozo Gen, Takashi Suzuki, Mitsutaka Kadokura

Published in: General Thoracic and Cardiovascular Surgery | Issue 7/2012

Abstract

Objective

Differentiation of atypical adenomatous hyperplasia (AAH), bronchioloalveolar carcinoma (BAC), and invasive carcinoma on computed tomography (CT) is useful for determining “follow-up or resection” strategies for lesions displaying ground-glass opacity (GGO). The purpose of this study is to evaluate one-dimensional quantitative CT values of GGO on high-resolution CT (HRCT) images using computer-aided diagnosis.

Methods

Between April 2001 and March 2010, a total of 44 nodules in 42 patients with pure or mixed GGOs ≤2 cm were retrospectively evaluated. Maximum diameter and one-dimensional mean CT (m-CT) value of the diameter were measured using a computer graphics support system (HOPE/DrABLE-EX, Fujitsu, Tokyo, Japan) that displays a CT density profile across the tumor.

Results

m-CT values were −682 ± 64 HU (range) for AAH lesions, −544 ± 179 (range) for Type A lesions, −496 ± 147 (range) for Type B lesions, and −371 ± 142 (range) for invasive lesions. AAH lesions had a significantly lower m-CT value than Type B lesions. AAH, Type A, and Type B lesions had significantly lower m-CT values than invasive lesions (p < 0.05). All seven GGO lesions with a maximum diameter ≤1 cm and m-CT value ≤−600 HU were pre-invasive lesions, while 16 of 22 (73 %) cases with maximum diameter >1 cm and m-CT value >−600 HU were invasive lesions.

Conclusion

Observation may be indicated for GGO lesions with a maximum diameter ≤1 cm and m-CT value ≤−600 HU.

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Title: One-dimensional mean computed tomography value evaluation of ground-glass opacity on high-resolution images
Authors: Akihiko Kitami
Yoshito Kamio
Shoko Hayashi
Kosuke Suzuki
Shugo Uematsu
Ryozo Gen
Takashi Suzuki
Mitsutaka Kadokura
Publication date: 01-07-2012
Publisher: Springer Japan
Published in: General Thoracic and Cardiovascular Surgery / Issue 7/2012
Print ISSN: 1863-6705
Electronic ISSN: 1863-6713
DOI: https://doi.org/10.1007/s11748-012-0066-7

Keynote webinar | Spotlight on medication adherence

Springer Medicine

One-dimensional mean computed tomography value evaluation of ground-glass opacity on high-resolution images

Abstract

Objective

Methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Objective

Methods

Results

Conclusion

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