Prevalence of Contrast Enhancement of the Oculomotor Nerve on 3D PD T1 MRI Sequence in Patients With Ophthalmoplegia
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 134
- 试验地点
- 1
- 主要终点
- Contrast enhancement of the oculomotor nerve on 3D PD T1 MRI sequence (presence or absence, determined by a radiologist)
研究概览
简要总结
Oculomotor nerve (third cranial nerve or "III") palsy is a relatively frequent cause of consultation in ophthalmology.
It may reveal a life-threatening pathology such as aneurysm rupture, pituitary apoplexy, and therefore need imaging in emergency. Apart from few extreme emergency situations, MRI of the oculomotor tract is the first-line examination required. In our usual clinical practice, we noticed in several patients unusual contrast enhancement within the oculomotor nerve on T1 sequence with gadolinium injection, observed in various locations along the nerve path (cavernous and/ or intra-orbital segment).
This contrast enhancement, could confirm the nerve impairment This study aims to analyse the efficiency of a new sequence 3D PD T1 which isotropic spatial resolution less than 1mm, not yet described in the literature, to depict this enhancement.
In patients with ophthalmoplegia involving probably the third cranial nerve, disclosing this MRI sign could help (i) to confirm the involvement of the oculomotor nerve and eliminate differential diagnoses such as myasthenia (ii) to orientate the etiological diagnosis (inflammatory or ischemic origin). This new sequence 3D PD T1 sequence focused on the III could thus be systematically included in the usual MRI protocol.
研究设计
- 研究类型
- Observational
- 观察模型
- Case Only
- 时间视角
- Cross Sectional
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Ophthalmoplegia whatever the clinical form (unilateral or not, isolated or not, sudden or progressive onset)
排除标准
- •Absolute contraindication to MRI or injection of contrast agents.
结局指标
主要结局
Contrast enhancement of the oculomotor nerve on 3D PD T1 MRI sequence (presence or absence, determined by a radiologist)
时间窗: Baseline
A double separate reading of the imaging will be carried out by an experienced radiologist and a junior radiologist on anonymized MRIs, with no access to clinical elements and interpretation of the other radiologist. In case of discrepancy between the radiologists, the final decision will be made by a third experienced radiologist under the same conditions (no access to clinical data, no access to the other evaluations).
次要结局
未报告次要终点