Schiavon F, Nardini S, Giannico S
Radiol Med. 1987 Jun;73(6):510-7.
Some cases of mediastinal pathology in which the only pathological pattern was a "dimness" of the tracheal transparency are described. This sign is not described in previous reports and is described as a short break in the aerial tracheogram as seen on the frontal roentgenograph. This sign is produced by an increase in the structures outside the trachea or by a decrease in the air column inside the trachea. Conventional and CT anatomic findings which account for the sign are discussed. A short review of the "normal" causes of tracheal dimness is presented. This sign may be useful especially in emergency radiology, since it provides additional information to a simple routine chest roentgenograph.
本文描述了一些纵隔病变病例，其唯一的病理表现是气管透明度“模糊”。此前的报告中未提及该征象，在正位X线片上，此征象表现为气管空气造影的短暂中断。该征象是由气管外结构增多或气管内气柱减少所致。文中讨论了导致该征象的传统及CT解剖学表现。对气管模糊的“正常”原因进行了简要回顾。该征象可能特别有助于急诊放射学诊断，因为它能为简单的常规胸部X线片提供额外信息。
