Tear transit time evaluation using real-time technique for dynamic MR dacryocystography

Singh, Swati; Dhull, Anuj; Selva, Dinesh; Ali, Mohammad Javed

doi:10.1080/01676830.2020.1735453

Cited by 7 publications

(2 citation statements)

References 16 publications

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“…Dynamic MR examinations through the execution of time-resolved angiography with interleaved stochastic trajectories (TWIST) 22 or dynamic recalled three-dimensional spoiled gradient (3DSPGR) 23 sequence demonstrated their ability to visualize real-time contrast flow through the lacrimal drainage system, from the lacrimal sac to nasolacrimal duct and finally inferior meatus, providing functional information.…”

Section: Introductionmentioning

confidence: 99%

“…8 Magnetic resonance (MR) dacryocystography with or without gadolinium administration has been increasingly used, as it does not involve ionizing radiation exposure, allows the identification of lacrimal drainage pathway obstruction and its level, and is characterized by a high-contrast resolution. 19,21 Dynamic MR examinations through the execution of timeresolved angiography with interleaved stochastic trajectories (TWIST) 22 or dynamic recalled three-dimensional spoiled gradient (3DSPGR) 23 sequence demonstrated their ability to visualize real-time contrast flow through the lacrimal drainage system, from the lacrimal sac to nasolacrimal duct and finally inferior meatus, providing functional information.…”

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confidence: 99%

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Non-contrast MR dacryocystography for the evaluation of epiphora and recurrent dacryocystitis: A preliminary study

et al. 2022

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Introduction Obstruction of the lacrimal drainage represents a common ophthalmologic issue. The blockage may interest any level of the lacrimal drainage pathway, and it is important to find the site of obstruction to plan the most appropriate treatment. In this study, findings from magnetic resonance (MR) dacryocystography were compared with findings from endoscopic and surgical procedures to evaluate the accuracy of MR dacryocystography in localizing the site of nasolacrimal duct obstruction. Methods We enrolled twenty-one patients with clinical suspicion of nasolacrimal duct obstruction who underwent dacryoendoscopy and surgery. MR dacryocystography was performed with a heavily T2-weighted fast spin echo sequence in the coronal planes. Before the MRI was performed, a sterile 0.9% NaCl solution was administered into both conjunctival sacs. For each examination, two independent readers (with 8 and 10 years of experience in head and neck imaging) evaluated both heavily 3D space T2-weighted and STIR sequences. Results Stenosis/obstruction of nasolacrimal duct or lacrimal sac was diagnosed in all 21 patients who underwent MRI dacryocystography. In particular, the site of the obstruction was classified as lacrimal sac in 12 (57%) patients, nasolacrimal duct in 6 (29%) patients, and canaliculi in 3 (14%) patients by both readers. By comparison with the evidence resulting from the endoscopy, there were differences between MRI dacryocystography and dacryoendoscopy in the evaluation of the obstruction’s site in three patients, with an overall accuracy of 85.7%. Conclusion MR dacryocystography allows a non-invasive evaluation of the lacrimal drainage pathway, valid for the planning of the most appropriate treatment.

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Section: Introductionmentioning

confidence: 99%