Sidhu PS. Clinical and imaging features of testicular torsion: role of ultrasound. Clinical Radiology 1999;54:343-352. Blomley MJK, Sidhu PS, Cosgrove DO, Albrecht T, Harvey CJ, Heckemann R, Butler-Barnes J, Eckersley RJ, Basilico R. Do different types of liver lesion differ in their uptake of the microbubble SHU508 in its late phase ? : early experience. Radiology 2001;220:661-667. Quinlan DJ, Alikhan R, Gishen P, Sidhu PS. Variations in lower limb venous anatomy: implications for US diagnosis of deep venous thrombosis. Radiology 2003;228:443-448. Sidhu PS, Shaw AS, Ellis SM, Karani JB, Ryan SM. Microbubble ultrasound contrast in the assessment of hepatic artery patency following liver transplantation: role in reducing frequency of hepatic artery arteriography. European Radiology 2004;14:21-30. Bryant TH, Blomley MJK, Albrecht T, Sidhu PS, Leen ELS, Basilico R, Pilcher J, Bushby LH, Hoffmann CW, Cosgrove DO, Harvey CJ, Mc Quarrie J, Paul D, Cosgrove DO. Improved characterization of liver lesions with liver specific microbubbles: prospective multicenter study. Radiology 2004;232:799-809.