How to Differentiate Normal from Abnormal Imaging Findings on Chest Radiographs

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  • 胸部X線写真―正常と異常影を見極める―

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Objective. The aim of this paper is to learn about the pitfalls in lung nodule detection on a posteroanterior chest radiographs, to understand the imaging findings of mimicking lung nodules, and to reveal various types of pseudolesion. Methods. Many cases that I have experienced are shown and outlined. Results. Various pitfalls in the diagnosis of chest radiographs are included, such as a lung nodule overlapped by a lung apex, an underdiaphragm, and a mediastinum. We should be aware of the findings that mimic lung nodules, such as the ossification of the first rib cartilage, nipple shadows, apical opacity, azygos lobes, bone islands, and osteophytes. Pseudolesions include normal variants such as pericardial fat pads, aortic nipples, rib anomalies, deformation of the normal anatomical structures, the shadow of an object on the skin, and characteristic chest X-ray shadows. Conclusion. It is important to be aware of the many pitfalls on chest radiographs, the findings that mimic lung nodules, and pseudolesions. This will enable the precise diagnosis of lung nodules on chest radiographs.

Journal

  • Haigan

    Haigan 56 (3), 232-241, 2016

    The Japan Lung Cancer Society

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