Advances in abdominal MR imaging.

摘要: Major technical advances in MR imaging have led to its wider use the evaluation of abdominal disease. The principle new pulse sequence is RARE for T2-weighted imaging. Multishot and breath-hold single-shot techniques are now widely used, both performed as well conventional spin-echo with far shorter acquisition times. most notable improvements been detection characterization hepatic lesions. Two liver-specific contrast agents received FDA approval during 1997: SPIO particles or ferumoxide mangafodipir trisodium, a hepatocyte-specific agent. Both these provide considerable benefit Manganese enhancement has also proved useful pancreas, although fat-suppressed T1-weighted dynamic gadolinium yielded results comparable those contrast-enhanced CT. hydrography, generic term static fluid imaging, another derivative fast MRCP, best known example rapidly employed primary method biliary pancreatic ducts become competitive ERCP. vascular especially portal venography, used noninvasive venous disease Budd Chiari disease, before placement transjugular intrahepatic portosystemic shunts, cancer staging. Finally, development phased-array body coils endorectal enabled high-quality perirectal (including Crohn fistula ano, postpartum sphincter dysfunction). Future applications will involve second-generation interventional techniques, including open systems, functional diffusion-weighted exploiting molecular activity tissues, virtual endoscopy. Although CT continues evolve premier technique survey screening abdomen, this modality assume some special nitch roles (in which it adds unique value) abdomen. Radiologists can safely that there undoubtedly be much more come.