Application of TWIST MR angiography to aid successful central venous access in challenging patients: initial single-centre experience.

AIM To investigate whether time-resolved angiography with interleaved stochastic trajectories (TWIST) with GeneRalised Autocalibrating Partially Parallel Acquisitions (GRAPPA) parallel acquisition could be used successfully to non-invasively and efficiently image patients with more complex vascular access issues. MATERIALS AND METHODS TWIST magnetic resonance angiography (MRA) in the GRAPPA algorithm was performed on 15 patients at our centre using the 1.5 T Siemens Magnetom Avanto MRI system. Images were interpreted by cardiac radiologists. RESULTS TWIST provided excellent dynamic imaging of the venous system, demonstrating venous occlusion, stenoses, and collaterals, as well as providing good anatomical detail. CONCLUSION TWIST MRA enables successful identification of candidate sites for central/tunnelled line access, whilst diagnosing complications of long-term access such as venous thrombosis or congenital venous anomalies.

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