The main radiological finding in progressive supranuclear palsy (PSP) is reduced midbrain volume. Both qualitative (e.g., hummingbird sign) and quantitative (e.g., area measurements) markers have been noted. Recent studies have shown a similar reduction also in idiopathic normal pressure hydrocephalus (iNPH). The purpose was to investigate the reliability and accuracy of these markers in discriminating PSP from iNPH and controls.

中文翻译：

---

进行性核上性麻痹和特发性正常压力脑积水的中脑区域和脑 MRI 的蜂鸟征

进行性核上性麻痹 (PSP) 的主要放射学发现是中脑体积减少。已经注意到定性（例如，蜂鸟标志）和定量（例如，面积测量）标记。最近的研究表明，特发性正常压力脑积水 (iNPH) 也有类似的减少。目的是研究这些标记在区分 PSP 与 iNPH 和对照方面的可靠性和准确性。