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Differentiating between acute-recurrent and chronic-residual deep venous thrombosis (DVT) is difficult in patients with a history of DVT, especially in those with chronic pain and leg swelling. Laboratory evaluation that includes d-dimer testing and compression ultrasound might distinguish new thrombi from residual old DVT, but if these studies are not definitive, additional approaches such as magnetic resonance imaging (MRI) might be helpful.
To examine the usefulness of magnetic resonance direct thrombus imaging (MRDTI) in this setting, investigators in the Netherlands performed a prospective, multicenter study involving 39 patients with symptomatic, acute-recurrent DVT. The researchers also studied 42 asymptomatic persons who had previous…