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Related Experiment Videos

[Dynamic magnetic resonance dacryocystography using half Fourier single shot fast spin echo sequence]

Y Takehara1, K Kurihashi, H Isoda

  • 1Department of Radiology, Hamamatsu University School of Medicine.

Nihon Igaku Hoshasen Gakkai Zasshi. Nippon Acta Radiologica
|October 21, 1998
PubMed
Summary

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Dynamic magnetic resonance dacryocystography (MRD) offers a reliable, non-radiation method for diagnosing nasolacrimal duct obstruction. This technique accurately identifies blockages in the lacrimal sac and duct, aiding in epiphora treatment.

Area of Science:

  • Ophthalmology
  • Radiology
  • Medical Imaging

Context:

  • Epiphora, or excessive tearing, often results from nasolacrimal duct obstruction.
  • Conventional diagnostic methods may involve ionizing radiation or invasive procedures.

Purpose:

  • To evaluate the efficacy of dynamic magnetic resonance dacryocystography (MRD) as a non-invasive diagnostic tool for nasolacrimal duct obstruction.

Summary:

  • Dynamic MRD was performed using a 1.5T MRI scanner and a standard head coil.
  • Polyethylene microcatheters were inserted into the lower lacrimal canaliculi, and a saline-xylocaine mixture was injected.
  • Heavily T2-weighted SSFSE sequences depicted lacrimal sac and duct pathologies, accurately pinpointing obstruction levels in five epiphora cases.

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Impact:

  • Dynamic MRD provides a reliable, radiation-free alternative for diagnosing nasolacrimal duct obstruction.
  • Findings were confirmed by X-ray dacryocystography and intraoperative results.
  • This method avoids chemical contrast agents, enhancing patient safety.