209.Windowing the thorax (胸部CT窗技术)

Chest CT scans are usually "windowed" and displayed in several formats in order to optimize anatomic definition. Lung windows (A) are chosen to maximize our ability to image abnormalities of the lung parenchyma and to identify normal and abnormal bronchial anatomy.

Mediastinal windows (B) are chosen to display the mediastinal, hilar, and pleural structures to best advantage. 

Bone windows (C) are utilized as a third way of displaying the data, visualizing the bony structures to their best advantage. It is important to recognize that the displays of these different windows are manipulations of the data obtained during the original scan and do not require rescanning the patient.

胸部CT扫描通常有几个“窗”来最佳的显示解剖结构。 “肺窗”最佳显示肺实质和支气管解剖结构。 “纵隔窗”显示纵隔、肺门、胸膜结构。 “骨窗”第三种显示模式，更好的现实骨骼结构。 以上三种窗位均可在一次扫描上获取，无需再次扫描。

来源：每天朗读一段医学影像学英语文章

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