Rahul Ganapati Hegde MBBS, MD, Presenter: Nothing to Disclose

Chinmay Nagesh MBBS, MD, Abstract Co-Author: Nothing to Disclose

Devendra Kulkarni, Abstract Co-Author: Nothing to Disclose

Anagha Rajeev Joshi MD, MBBS, Abstract Co-Author: Nothing to Disclose

Suleman Adam Merchant MD, Abstract Co-Author: Nothing to Disclose

T2 weighted 3D MRI sequences such as DRIVE, CISS produce maximal contrast between CSF and soft tissue and a three dimensional data set thereby enabling detection of fine structures. They are widely used for imaging cranial nerves in the posterior fossa but they can also be used for diagnosis of many other entities that require a high CSF to soft tissue contrast. Awareness of the utility of this sequence and its addition to the routine MRI protocol in certain clinical scenarios that we have discussed can be highly rewarding.

Briefly discuss the physics behind the acquisition of sequences like CISS and DRIVE. We demonstrate the utility of this sequence with a few cases covering a spectrum of etiologies- extra-axial cystic lesions like arachnoid cysts & epidermoid cysts, intra-axial cystic lesions, trigeminal neuralgia, hemifacial spasm, intraventricular lesions, acqueductal stenosis, traumatic brachial plexus injury and spontaneous CSF rhinorrhea. These cases highlight how the DRIVE/CISS sequence trumps the routine imaging sequences and aids in reaching the diagnosis. We discuss the clinical scenarios in which addition of this sequence to the MRI protocol is advisable.  

http://abstract.rsna.org/uploads/2014/14010074/14010074_flaq.pdf

Hegde, R, Nagesh, C, Kulkarni, D, Joshi, A, Merchant, S, The Role of Heavily T2 Weighted 3D Sequences in CNS MR Imaging.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14010074.html