Abstract：
UNASSIGNED: Orthostatic dizziness/vertigo (ODV) is characterized by lightheadedness owing to postural changes.
UNASSIGNED: To measure the endolymphatic space (ELS)/total fluid space (TFS) volume ratio and the distribution rate of endolymphatic fluid (ELF) of patients with ODV and compare them with those of control subjects (CS).
UNASSIGNED: This study included 22 patients (44 ears) with ODV and 52 controls (104 ears, CS). The ELS/TFS volume ratio (%) and distribution rate (%) of the inner ear components were measured using 3-dimensional magnetic resonance imaging.
UNASSIGNED: In the ODV group, the mean ELS/TFS volume ratios of the cochlea, vestibule, and semi-circular canals (SCCs) were 12.1%, 18.6%, and 18.1%, respectively; the mean ELS distribution rates for the cochlea, vestibule, and SCCs were 27.3%, 26.2%, and 46.6%, respectively. The ELS distribution rate of the vestibule was significantly lower (p < .01) and the ELS distribution rate of the SCCs was significantly higher in the ODV than in the CS group (p < .01).
UNASSIGNED: The ELS distribution rate in the vestibule + SCCs among patients with ODV did not differ from that in the CS; ELF in the vestibule moved to the SCCs, and a large amount of ELF was distributed only in the SCCs.
UNASSIGNED: To measure the endolymphatic space (ELS)/total fluid space (TFS) volume ratio and the distribution rate of endolymphatic fluid (ELF) of patients with ODV and compare them with those of control subjects (CS).
UNASSIGNED: This study included 22 patients (44 ears) with ODV and 52 controls (104 ears, CS). The ELS/TFS volume ratio (%) and distribution rate (%) of the inner ear components were measured using 3-dimensional magnetic resonance imaging.
UNASSIGNED: In the ODV group, the mean ELS/TFS volume ratios of the cochlea, vestibule, and semi-circular canals (SCCs) were 12.1%, 18.6%, and 18.1%, respectively; the mean ELS distribution rates for the cochlea, vestibule, and SCCs were 27.3%, 26.2%, and 46.6%, respectively. The ELS distribution rate of the vestibule was significantly lower (p < .01) and the ELS distribution rate of the SCCs was significantly higher in the ODV than in the CS group (p < .01).
UNASSIGNED: The ELS distribution rate in the vestibule + SCCs among patients with ODV did not differ from that in the CS; ELF in the vestibule moved to the SCCs, and a large amount of ELF was distributed only in the SCCs.
摘要：
■体位性头晕/眩晕（ODV）的特征是由于姿势变化而导致的头晕。
■测量ODV患者的内淋巴空间（ELS）/总流体空间（TFS）体积比和内淋巴液（ELF）的分配率，并将其与对照组（CS）进行比较。
■这项研究包括22例ODV患者（44耳）和52例对照（104耳，CS）。使用3维磁共振成像测量内耳成分的ELS/TFS体积比(%)和分布率(%)。
■在ODV组中，耳蜗的平均ELS/TFS体积比，前庭,半圆形运河(SCC)占12.1%，18.6%,18.1%，分别是耳蜗的平均ELS分配率，前庭,SCCs为27.3%，26.2%,和46.6%，分别。ODV组前庭的ELS分布率明显低于CS组（p<0.01），SCC的ELS分布率明显高于CS组（p<0.01）。
■ODV患者在前庭+SCC中的ELS分布率与CS中的ELS分布率没有差异；前庭中的ELF移至SCC，大量ELF仅分布在SCC中。
■测量ODV患者的内淋巴空间（ELS）/总流体空间（TFS）体积比和内淋巴液（ELF）的分配率，并将其与对照组（CS）进行比较。
■这项研究包括22例ODV患者（44耳）和52例对照（104耳，CS）。使用3维磁共振成像测量内耳成分的ELS/TFS体积比(%)和分布率(%)。
■在ODV组中，耳蜗的平均ELS/TFS体积比，前庭,半圆形运河(SCC)占12.1%，18.6%,18.1%，分别是耳蜗的平均ELS分配率，前庭,SCCs为27.3%，26.2%,和46.6%，分别。ODV组前庭的ELS分布率明显低于CS组（p<0.01），SCC的ELS分布率明显高于CS组（p<0.01）。
■ODV患者在前庭+SCC中的ELS分布率与CS中的ELS分布率没有差异；前庭中的ELF移至SCC，大量ELF仅分布在SCC中。
