Learning objectives
- to describe the basics Principles,
Technique and parameters for optimisation of Diffusion MR Neurography technique using DWIBS and it's clinical applications
-To highlight the advantages and pitfalls of this technique as compared to other Sequences used for MRN
.- To showcase clinical use of Whole body Diffusion MR Neurography in diagnostic characterization of Heriditary Poly neuropathies and other types of Poly neuropathies
Background
Magnetic resonance neurography is an exciting imaging technique
that affords multi-planar anatomic and functional depiction of peripheral
nerves and their related lesions.
Appropriate imaging and accurate interpretation are essential components of successful performance of this ever advancing Technique.
DWIBS MR Neurography:
DW_MRI appears to be very effective method to visualize nerves of Peripheral nervous system.
It is well known that the application of Motion probing gradients(MPGS) using DW MR Imaging results in signal suppression from structures with relatively un impeded diffusion such as blood vessels...
Imaging findings OR Procedure Details
Visualization of Nerves using Diffusion MRI
Challenges in Conventional MR Neurography include inability to render a 3D or projectional images such as MIP (maximum Intensity projection),
inability to depict the path of peripheral nerves along the length of nerve sheaths,
due to overlapping of structures from adjacent tissues,
such as veins which frequently accompany peripheral nerves ,
can be difficult to distinguish from the neural elements.(e.g. At the level of Brachial Plexus) due to their similar signal characteristics on T1 and T2 weighted images
DWIBS...
Conclusion
This exhibit gives a one stop shop Points to Practice session on Diffusion MR Neurography its technique,
optimisation and Clinical applications ,ots pearls and pitfalls.
1.Diagnostic studies of MR-neurography and high-resolution ultrasound in entrapment-neuropathies consistently report accurate determination and localization of symptomatic nerve entrapment.
2.Additionally,
the longitudinal sampling of nerve-T2-signal over larger areas of coverage has become technically feasible.
3.
High-resolution nerve imaging with extended anatomical coverage is feasible and improves the topographic description of spatial lesion dispersion which is particularly relevant for the discrimination...