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Related Experiment Video

Updated: Jun 6, 2025

Transcanalicular Diode Laser-assisted Dacryocystorhinostomy for the Treatment of Primary Acquired Nasolacrimal Duct Obstruction
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MR dacryocystography - Optimising a dynamic imaging protocol for patients with epiphora.

L-V Tran1, J Bush1, M Baig2

  • 1Clinical Imaging Sciences Centre, University of Sussex, Knightstgate Road, Falmer, BN1 9RR, United Kingdom.

Radiography (London, England : 1995)
|November 22, 2024
PubMed
Summary

A new non-invasive magnetic resonance dacryocystography (MRDCG) technique uses a gadolinium drip for fast, real-time assessment of the nasolacrimal drainage system (NLDS) anatomy and function.

Keywords:
Dynamic imagingEpiphoraMRDCGMRINLDS

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Area of Science:

  • Ophthalmology
  • Radiology
  • Medical Imaging

Background:

  • Epiphora diagnosis often involves ionizing radiation and invasive procedures.
  • Magnetic resonance dacryocystography (MRDCG) is underutilized in clinical settings.
  • Current methods for nasolacrimal drainage system (NLDS) assessment have limitations.

Purpose of the Study:

  • To optimize a non-invasive MRDCG technique.
  • To evaluate the anatomy and real-time function of the NLDS.
  • To establish a faster, safer diagnostic method for epiphora.

Main Methods:

  • Developed a protocol on a 1.5T MRI scanner with a 32-channel head coil.
  • Utilized T2-weighted sequences for NLDS anatomy and 2D dynamic acquisition for real-time contrast flow.
  • Administered a continuous, slow drip infusion of diluted gadolinium contrast to both eyes.

Main Results:

  • Achieved clear visualization of NLDS anatomy in 85% of cases.
  • Demonstrated real-time contrast flow through the NLDS.
  • Successfully confirmed contrast presence/absence using 3D T1-weighted imaging.

Conclusions:

  • The optimized non-invasive MRDCG provides anatomical and functional NLDS evaluation in under 30 minutes.
  • This technique offers a promising alternative to traditional radiological methods.
  • Further studies are needed to compare MRDCG with dacryocystography (DCG) and dye-stirred galactography (DSG).