1Mangkharak J, chaiyasoot W, Pusuwan P, et al. Radionuelide venography in the diagnosis of deep vein thrombosis of the lower extrernities:a comparison to contrast venography[J]. J Med Assoc Thai,1998,81(6):432.
2Fard MN, Mostaan M, Anaraki MR. Utility of Lower Extremity Duplex Sonogrphy in Patients With Venous Thromboembolism [J]. J Clin Ultrasound, 2001,29(2) :92-98.