医学影像英语每日读丨142.HRCT findings: Decreased Lung Attenuation

每天朗读一段医学影像学英语文章

领读：张恒老师

Figure 7-1 Mosaic perfusion in patient with cystic fibrosis.

Lung density and attenuation are partially determined by the volume of blood present within pulmonary vessels. Thus, regional differences in lung perfusion in patients with airways disease or pulmonary vascular disease can result in inhomogeneous lung opacity on high-resolution computed tomography (HRCT). Because this is often patchy or “mosaic” in distribution, with different regions of lung being of differing attenuation, it has been termed mosaic perfusion or mosaic oligemia, although the former term is most appropriate. This can result from airways or vascular disease. Areas of relatively decreased lung opacity seen on HRCT can be of varying sizes and sometimes appear to correspond to lobules, segments, lobes, or an entire lung.

From: WEBB - High-Resolution CT of the Lung

Notes：

1. mosaic [moʊˈzeɪɪk] n. 马赛克

2. inhomogeneous [ˌɪnhoʊmə'dʒi:nɪrs] adj. 不均匀的

3. opacity [oʊˈpæsəti] n. 磨玻璃

4. oligemia [ɒlɪ'gi:mɪr] n. 血量减少

翻译：妙然

【HRCT findings: Decreased Lung Attenuation 肺部低密度影】肺囊性纤维化患者“马赛克灌注征”。肺部密度的高低取决于局部肺血管内血容量的多少。因此，患有气道疾病或血管性疾病可导致相应区域血液灌注程度不同，从而在HRCT上表现为不同的密度区。由于不同区域的密度不同，通常呈斑片状或马赛克样分布，因此学名也叫“马赛克衰减”或“马赛克样血量减少”，但“马赛克衰减”则更为常用/适用。该征象可由气道疾病或血管性疾病导致。HRCT上呈现的密度减低区大小不一，可呈肺小叶、肺段、肺叶或全肺分布。

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来源：每天朗读一段医学影像学英语文章

圈主

深圳市人民医院放射科副主任医师杨敏洁

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