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Abstract #0245

Deep Vein Thrombosis (DVT): comparison of MR Direct Thrombus Imaging and Non-Contrast-Enhanced MRA

Andrew Nicholas Priest 1 , Sally Hunter 1 , Ilse Joubert 1 , Sarah Hilborne 1 , David J Bowden 1 , Martin John Graves 1 , Trevor Baglin 2 , and David John Lomas 1

1 Radiology, Addenbrooke's Hospital and University of Cambridge, Cambridge, United Kingdom, 2 Haematology, Addenbrooke's Hospital, Cambridge, United Kingdom

Both non-contrast-enhanced MR venography (NCE-MRV) and MR direct thrombus imaging (MR-DTI) can image deep vein thrombosis (DVT). The MR-DTI signal varies with thrombus age. We measured the size and location of a first DVT assessed by NCE-MRV and MR-DTI acquired at three different time-points. The two methods always agreed at the first time-point, within a week of diagnosis, but at later time-points (three and six months) most of the thrombus was not seen on MR-DTI, with only very small bright-signal regions. This may be important for the clinically-important question of distinguishing between acute recurrent thrombus and a residual previous DVT.

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