PURPOSE: Interventional MRI has significant potential for image guidance of iliac angioplasty and related vascular procedures. A technology framework with in-room image display, control, communication and MRI-guided intervention techniques was designed and tested for its potential to provide safe, fast and efficient MRI-guided angioplasty of the iliac arteries. METHODS: A 1.5-T MRI scanner was adapted for interactive imaging during endovascular procedures using new or modified interventional devices such as guidewires and catheters. A perfused vascular phantom was used for testing. Pre-, intra- and post-procedural visualization and measurement of vascular morphology and flow was implemented. A detailed analysis of X-ray fluoroscopic angiography workflow was conducted and applied. Two interventional radiologists and one physician in training performed 39 procedures. All procedures were timed and analyzed. RESULTS: MRI-guided iliac angioplasty procedures were successfully performed with progressive adaptation of techniques and workflow. The workflow, setup and protocol enabled a reduction in table time for a dedicated MRI-guided procedure to 6 min 33 s with a mean procedure time of 9 min 2 s, comparable to the mean procedure time of 8 min 42 s for the standard X-ray-guided procedure. CONCLUSIONS: MRI-guided iliac vascular interventions were found to be feasible and practical using this framework and optimized workflow. In particular, the real-time flow analysis was found to be helpful for pre- and post-interventional assessments. Design optimization of the catheters and in vivo experiments are required before clinical evaluation.
PURPOSE: Interventional MRI has significant potential for image guidance of iliac angioplasty and related vascular procedures. A technology framework with in-room image display, control, communication and MRI-guided intervention techniques was designed and tested for its potential to provide safe, fast and efficient MRI-guided angioplasty of the iliac arteries. METHODS: A 1.5-T MRI scanner was adapted for interactive imaging during endovascular procedures using new or modified interventional devices such as guidewires and catheters. A perfused vascular phantom was used for testing. Pre-, intra- and post-procedural visualization and measurement of vascular morphology and flow was implemented. A detailed analysis of X-ray fluoroscopic angiography workflow was conducted and applied. Two interventional radiologists and one physician in training performed 39 procedures. All procedures were timed and analyzed. RESULTS: MRI-guided iliac angioplasty procedures were successfully performed with progressive adaptation of techniques and workflow. The workflow, setup and protocol enabled a reduction in table time for a dedicated MRI-guided procedure to 6 min 33 s with a mean procedure time of 9 min 2 s, comparable to the mean procedure time of 8 min 42 s for the standard X-ray-guided procedure. CONCLUSIONS: MRI-guided iliac vascular interventions were found to be feasible and practical using this framework and optimized workflow. In particular, the real-time flow analysis was found to be helpful for pre- and post-interventional assessments. Design optimization of the catheters and in vivo experiments are required before clinical evaluation.
Authors: Rüdiger Hoffmann; Christoph Thomas; Hansjörg Rempp; Diethard Schmidt; Philippe L Pereira; Claus D Claussen; Stephan Clasen Journal: Eur Radiol Date: 2011-09-30 Impact factor: 5.315
Authors: Mandy Kaiser; Markus Detert; Martin A Rube; Abubakr El-Tahir; Ole Jakob Elle; Andreas Melzer; Bertram Schmidt; Georg H Rose Journal: Biomed Tech (Berl) Date: 2015-04 Impact factor: 1.411
Authors: Ehud J Schmidt; Richard P Mallozzi; Aravinda Thiagalingam; Godtfred Holmvang; Andre d'Avila; Renee Guhde; Robert Darrow; Glenn S Slavin; Maggie M Fung; Jeremy Dando; Lori Foley; Charles L Dumoulin; Vivek Y Reddy Journal: Circ Arrhythm Electrophysiol Date: 2009-12
Authors: Fabiola Fernández-Gutiérrez; Santiago Martínez; Martin A Rube; Benjamin F Cox; Mahsa Fatahi; Kenneth C Scott-Brown; J Graeme Houston; Helen McLeod; Richard D White; Karen French; Mariana Gueorguieva; Erwin Immel; Andreas Melzer Journal: Int J Comput Assist Radiol Surg Date: 2015-02-21 Impact factor: 2.924