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Preliminary Study on Lacrimal Passages by Magnetic Resonance Hydrography |
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| Preliminary Study on Lacrimal Passages by Magnetic Resonance Hydrography |
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作者：毛晓春 文章来源：Dept. of Ophthalmology, Xiang yang Central Hospital , Xiang yang 点击数：318 更新时间：2012/9/13 
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Purpose To evaluate the clinical application value of magnetic resonance hydrography (MRH) for the assessment of lacrimal outflow disorders.
Methods 48 healthy eyes and 45 eyes with epiphora underwent MRH after the topical administration of sterile 0.9% NaCl solution in conjunctival sac. The T2-weighted fast spin-echo sequences (T2W/TSE) were used in the study. 19 patients with lacrimal outflow disorders underwent surgical treatment, including dacryocystorhinostomy, laser plastic operation of lacrimal duct under endoscopy and silicone intubation for lacrimal duct obstruction.
Results MRH technique can provide clear images of dacryocyst and nasolacrimal duct and it could make accurate judgments of the obstruction location and morphological changes of lacrimal drainage apparatus. The lacrimal duct did not visualize satisfactorily in healthy eyes and eyes with epiphora, however, the changes of lacrimal passages could be analyzed through images reconstructed by the maximum intensity projection (MIP) technique. The intraoperative findings were compatible with the MR diagnostic results in 18 patients and 1 case of nasolacrimal duct stenosis showed obstruction under lacrimal duct endoscopy.
Conclusions MRH technique is a reliable and non-invasive method which will play an important role in the diagnosis and treatment of the obstruction level in the lacrimal system in patients with epiphora. |
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