Int J Comput Assist Radiol Surg - Preclinical feasibility of a technology framework for MRI-guided iliac angioplasty.

Tópicos

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Resumo

RPOSE: 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.

Resumo Limpo

rpose intervent mri signific potenti imag guidanc iliac angioplasti relat vascular procedur technolog framework inroom imag display control communic mriguid intervent techniqu design test potenti provid safe fast effici mriguid angioplasti iliac arteriesmethod t mri scanner adapt interact imag endovascular procedur use new modifi intervent devic guidewir cathet perfus vascular phantom use test pre intra postprocedur visual measur vascular morpholog flow implement detail analysi xray fluoroscop angiographi workflow conduct appli two intervent radiologist one physician train perform procedur procedur time analyzedresult mriguid iliac angioplasti procedur success perform progress adapt techniqu workflow workflow setup protocol enabl reduct tabl time dedic mriguid procedur min s mean procedur time min s compar mean procedur time min s standard xrayguid procedureconclus mriguid iliac vascular intervent found feasibl practic use framework optim workflow particular realtim flow analysi found help pre postintervent assess design optim cathet vivo experi requir clinic evalu

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