Image-guided and -monitored renal artery stenting using only MRI.
J Magn Reson Imaging
; 23(5): 619-27, 2006 May.
Article
in En
| MEDLINE
| ID: mdl-16555228
ABSTRACT
PURPOSE:
To demonstrate the ability of a unique interventional MR system to be used safely and effectively as the only imaging modality for all phases of MR-guided stent-supported angioplasty. MATERIALS ANDMETHODS:
An experimental disease model of renal stenosis was created in six pigs. An interventional MR system, which employed previously reported tools for real-time catheter tracking with automated scan-plane positioning, adaptive image parameters, and radial true-FISP imaging with steady-state precession (True-FISP) imaging coupled with a high-speed reconstruction technique, was then used to guide all phases of the intervention, including guidewire and catheter insertion, stent deployment, and confirmation of therapeutic success. Pre- and postprocedural X-ray imaging was used as a gold standard to validate the experimental results.RESULTS:
All of the stent-supported angioplasty interventions were a technical success and were performed without complications. The average postoperative residual stenosis was 14.9%. The image guidance enabled the stents to be deployed with an accuracy of 0.98 +/- 0.69 mm. Additionally, using this interventional MRI system to guide renal artery stenting significantly reduces the procedure time, as compared to using X-ray fluoroscopy.CONCLUSION:
This study has clearly demonstrated the first successful treatment of renal artery stenting in an experimental animal model solely under MRI guidance and monitoring.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Renal Artery
/
Renal Artery Obstruction
/
Magnetic Resonance Imaging
/
Stents
/
Monitoring, Intraoperative
/
Surgery, Computer-Assisted
Type of study:
Evaluation_studies
/
Guideline
/
Prognostic_studies
Limits:
Animals
Language:
En
Journal:
J Magn Reson Imaging
Journal subject:
DIAGNOSTICO POR IMAGEM
Year:
2006
Document type:
Article
Affiliation country:
Estados Unidos