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Time-resolved three-dimensional technique for dynamic magnetic resonance dacryocystography.

Paul I Sia1, David Curragh1, Sandy Patel1

  • 1South Australian Institute of Ophthalmology, Royal Adelaide Hospital, Adelaide, South Australia, Australia.

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This study presents a new dynamic magnetic resonance dacryocystography (MRDCG) technique for assessing nasolacrimal drainage. The method reliably visualizes tear flow, offering potential for diagnosing functional obstructions.

Keywords:
epiphoramagnetic resonance dacryocystographynasolacrimal duct obstruction

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Area of Science:

  • Ophthalmology
  • Medical Imaging
  • Anatomy

Background:

  • Nasolacrimal drainage assessment is crucial for diagnosing epiphora.
  • Existing imaging modalities have limitations in dynamic evaluation.
  • A novel dynamic magnetic resonance dacryocystography (MRDCG) protocol is introduced.

Purpose of the Study:

  • To describe a new dynamic MRDCG protocol.
  • To report normative findings in asymptomatic individuals.
  • To evaluate the efficacy of MRDCG in assessing lacrimal drainage.

Main Methods:

  • Prospective observational study involving 17 patients with unilateral epiphora.
  • Dynamic MRDCG utilizing the time-resolved angiography with interleaved stochastic trajectories (TWIST) sequence.
  • Measurement of tear transit times and anatomical dimensions.

Main Results:

  • The dynamic MRDCG with TWIST sequence successfully visualized contrast flow.
  • Tear transit times and anatomical dimensions were consistent with existing literature.
  • The technique demonstrated reliable contrast flow visualization.

Conclusions:

  • Dynamic MRDCG offers excellent structural and temporal resolution for evaluating lacrimal outflow obstructions.
  • This physiological imaging modality holds potential for assessing functional obstructions.
  • Further research into tear flow assessment using dynamic MRDCG is warranted.