[The MR imaging of the vena cava system: a comparison of different technics]. / MR-Bildgebung des Hohlvenensystems: Vergleich unterschiedlicher Techniken.

PURPOSE: To evaluate the feasibility and diagnostic value of there different MR angiographic imaging techniques for the assessment of the central body veins. METHODS: 25 investigations of the central veins were performed with an ECG-triggered black-blood HASTE sequence, a segmented 2D cine FLASH sequence and a contrast-enhanced 3D-FISP angiography. The results of the MR-studies were compared with those of spiral CT or venography. RESULTS: The HASTE sequence was suitable for the assessment of the complete central body vein system also in less cooperative patients. The combination with the 2D cine FLASH sequence enabled the detection of intravascular tumors or thromboses and the graduation of subtotal occlusions. The involvement of the right atrium was proved in 2/2 cases. The attachment at the vessel wall could be assessed. Only contrast-enhanced 3D MRA visualized the renal veins and complex collaterals sufficiently. But this procedure has to be done in a strict breath-hold technique. CONCLUSION: In the present study all thromboses and tumor cones of the central body veins were detected with the combined use of HASTE/Cine FLASH. For the assessment of complex collaterals and the renal vessels the application of contrast-enhanced 3D-MRA techniques is necessary.