Interventional magnetic resonance imaging: An alternative to image guidance with ionising radiation

作     者：Bock, M Umathum, R Zuehlsdorff, S Volz, S Fink, C Hallscheidt, P Zimmermann, H Nitz, W Semmler, W 

作者机构：Deutsch Krebsforschungszentrum Abt Med Phys Radiol E020 D-69120 Heidelberg Germany Siemens Med Solut D-91052 Erlangen Germany 

出 版 物：《RADIATION PROTECTION DOSIMETRY》 (辐射防护剂量学)

年 卷 期：2005年第117卷第1-3期

页      面：74-78页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 1004[医学-公共卫生与预防医学(可授医学、理学学位)] 08[工学] 0827[工学-核科学与技术] 1009[医学-特种医学] 

基　　金：Siemens Medical Solutions 

主　　题：RF field Histology Image X-ray imaging Scanner Computer hardware Guidance placement of stent target organ soft parts three-dimensional displays limited access Catheters Frame Rate image samples 

摘      要：At present, interventional procedures, such as stent placement, are performed under X-ray image guidance. Unfortunately with X-ray imaging, both patient and interventionalist are exposed to ionising radiation. Furthermore, X-ray imaging is lacking soft tissue contrast and is not capable of true 3-D displays of either interventional device or tissue morphology. Magnetic resonance imaging (MRI) offers excellent soft tissue contrast, 3-D acquisition techniques, as well as rapid image acquisition and reconstruction. Despite these advantages, MR-guided interventions are challenging owing to the limited access to the patient, strong magnetic and radio-frequency fields that require special interventional devices, inferior image frame rates and spatial resolution, and high MRI scanner noise. For MR-guided intravascular interventions, where access to the target organ is achieved through catheters, dedicated hardware and automated image slice positioning techniques have been developed. We illustrate that MR-guided renal embolisations can be performed in closed-bore high-field MR scanners.