Related Experiment Video
Updated: Jun 6, 2025
07:30
Transcanalicular Diode Laser-assisted Dacryocystorhinostomy for the Treatment of Primary Acquired Nasolacrimal Duct Obstruction
Published on: October 13, 2017
11.0K
MR dacryocystography - Optimising a dynamic imaging protocol for patients with epiphora.
1Clinical Imaging Sciences Centre, University of Sussex, Knightstgate Road, Falmer, BN1 9RR, United Kingdom.
Radiography (London, England : 1995)
|November 22, 2024
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.
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).
