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Amin EK, Campbell-Washburn A, Ratnayaka K. MRI-Guided Cardiac Catheterization in Congenital Heart Disease: How to Get Started. Curr Cardiol Rep 2022; 24:419-429. [PMID: 35107702 PMCID: PMC8979923 DOI: 10.1007/s11886-022-01659-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/15/2021] [Indexed: 02/07/2023]
Abstract
PURPOSE OF REVIEW Cardiac magnetic resonance imaging provides radiation-free, 3-dimensional soft tissue visualization with adjunct hemodynamic data, making it a promising candidate for image-guided transcatheter interventions. This review focuses on the benefits and background of real-time magnetic resonance imaging (MRI)-guided cardiac catheterization, guidance on starting a clinical program, and recent research developments. RECENT FINDINGS Interventional cardiac magnetic resonance (iCMR) has an established track record with the first entirely MRI-guided cardiac catheterization for congenital heart disease reported nearly 20 years ago. Since then, many centers have embarked upon clinical iCMR programs primarily performing diagnostic MRI-guided cardiac catheterization. There have also been limited reports of successful real-time MRI-guided transcatheter interventions. Growing experience in performing cardiac catheterization in the magnetic resonance environment has facilitated practical workflows appropriate for efficiency-focused cardiac catheterization laboratories. Most exciting developments in imaging technology, MRI-compatible equipment and MRI-guided novel transcatheter interventions have been limited to preclinical research. Many of these research developments are ready for clinical translation. With increasing iCMR clinical experience and translation of preclinical research innovations, the time to make the leap to radiation-free procedures is now.
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Affiliation(s)
- Elena K Amin
- Division of Pediatric Cardiology, UCSF Benioff Children's Hospitals, University of California, San Francisco, San Francisco, CA, USA.
| | - Adrienne Campbell-Washburn
- Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Kanishka Ratnayaka
- Division of Pediatric Cardiology, Rady Children's Hospital, University of California, San Diego, 3020 Children's Way, San Diego, CA, USA
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Rier SC, Vreemann S, Nijhof WH, van Driel VJHM, van der Bilt IAC. Interventional cardiac magnetic resonance imaging: current applications, technology readiness level, and future perspectives. Ther Adv Cardiovasc Dis 2022; 16:17539447221119624. [PMID: 36039865 PMCID: PMC9434707 DOI: 10.1177/17539447221119624] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Cardiac magnetic resonance (CMR) provides excellent temporal and spatial resolution, tissue characterization, and flow measurements. This enables major advantages when guiding cardiac invasive procedures compared with X-ray fluoroscopy or ultrasound guidance. However, clinical implementation is limited due to limited availability of technological advancements in magnetic resonance imaging (MRI) compatible equipment. A systematic review of the available literature on past and present applications of interventional MR and its technology readiness level (TRL) was performed, also suggesting future applications. METHODS A structured literature search was performed using PubMed. Search terms were focused on interventional CMR, cardiac catheterization, and other cardiac invasive procedures. All search results were screened for relevance by language, title, and abstract. TRL was adjusted for use in this article, level 1 being in a hypothetical stage and level 9 being widespread clinical translation. The papers were categorized by the type of procedure and the TRL was estimated. RESULTS Of 466 papers, 117 papers met the inclusion criteria. TRL was most frequently estimated at level 5 meaning only applicable to in vivo animal studies. Diagnostic right heart catheterization and cavotricuspid isthmus ablation had the highest TRL of 8, meaning proven feasibility and efficacy in a series of humans. CONCLUSION This article shows that interventional CMR has a potential widespread application although clinical translation is at a modest level with TRL usually at 5. Future development should be directed toward availability of MR-compatible equipment and further improvement of the CMR techniques. This could lead to increased TRL of interventional CMR providing better treatment.
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Affiliation(s)
- Sophie C Rier
- Cardiology Division, Department of Cardiology, Haga Teaching Hospital, Els Borst-Eilersplein 275, Postbus 40551, The Hague 2504 LN, The Netherlands
| | - Suzan Vreemann
- Department of Cardiology, Haga Teaching Hospital, The Hague, The Netherlands Siemens Healthineers Nederland B.V., Den Haag, The Netherlands
| | - Wouter H Nijhof
- Siemens Healthineers Nederland B.V., Den Haag, The Netherlands
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Kogure T, Qureshi SA. The Future of Paediatric Heart Interventions: Where Will We Be in 2030? Curr Cardiol Rep 2020; 22:158. [PMID: 33037461 PMCID: PMC7546978 DOI: 10.1007/s11886-020-01404-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/01/2020] [Indexed: 11/30/2022]
Abstract
Purpose of Review Cardiac catheterization therapies to treat or palliate infants, children and adults with congenital heart disease have developed rapidly worldwide in both technical innovation and device development in the previous three decades. By reviewing of current status of novel or development of devices and techniques, we will discuss what is likely to happen in paediatric heart intervention in the next decade. Recent Findings Recently, biodegradable stents and devices, transcatheter pulmonary valve implantation for the native right ventricle outflow tract and MRI-guided interventions have been progressing rapidly with good immediate to early results. These are expected to be introduced and spread in the next decade although there are still challenges to overcome. Summary The future of paediatric heart intervention is very promising with rapid development of technological progress.
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Affiliation(s)
- Tomohito Kogure
- Department of Congenital Cardiology, Evelina London Children's Hospital, Guy's and St Thomas' NHS Foundation Trust, London, SE1 7EH, UK.,Department of Cardiology, Tokyo Women's Medical University, Tokyo, 162-0054, Japan
| | - Shakeel A Qureshi
- Department of Congenital Cardiology, Evelina London Children's Hospital, Guy's and St Thomas' NHS Foundation Trust, London, SE1 7EH, UK.
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Alkashkari W, Albugami S, Hijazi ZM. Current practice in atrial septal defect occlusion in children and adults. Expert Rev Cardiovasc Ther 2020; 18:315-329. [PMID: 32441165 DOI: 10.1080/14779072.2020.1767595] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
INTRODUCTION Atrial septal defect (ASD) is one of the most common congenital heart diseases (CHD) in children and adults. This group of malformations includes several types of atrial communications allowing shunting of blood between the systemic and the pulmonary circulations. Early diagnosis and treatment carries favorable outcomes. Patients diagnosed during adulthood often present with complications related to longstanding volume overload such as pulmonary artery hypertension (PAH), atrial dysrhythmias, and right (RV) and left (LV) ventricular dysfunction. AREA COVERED This article intended to review all aspects of ASD; anatomy, pathophysiology, clinical presentation, natural history, and indication for treatment. Also, we covered the transcatheter therapy in detail, including the procedural aspect, available devices, and outcomes. EXPERT OPINION There has been a remarkable improvement in the treatment strategy of ASD over the last few decades. Transcatheter closure of ASD is currently accepted as the treatment of choice in most patients with appropriately selected secundum ASDs. This review will focus on the most recent advances in diagnosis and treatment strategy of secundum ASD.
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Affiliation(s)
- Wail Alkashkari
- Department of Cardiology, King Faisal Cardiac Center, Ministry of National Guard Health Affairs , Jeddah, Saudi Arabia.,Department of Postgraduate, King Saud Bin Abdulaziz University for Health Science , Jeddah, Saudi Arabia.,Department of Medical Research, King Abdullah International Medical Research Center , Jeddah, Saudi Arabia
| | - Saad Albugami
- Department of Postgraduate, King Saud Bin Abdulaziz University for Health Science , Jeddah, Saudi Arabia
| | - Ziyad M Hijazi
- Sidra Heart Center, Sidra Medicine , Doha, Qatar.,Weill Cornell Medicine , New York, NY, USA
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Abstract
In recent years, interventional cardiac magnetic resonance imaging (iCMR) has evolved from attractive theory to clinical routine at several centers. Real-time cardiac magnetic resonance imaging (CMR fluoroscopy) adds value by combining soft-tissue visualization, concurrent hemodynamic measurement, and freedom from radiation. Clinical iCMR applications are expanding because of advances in catheter devices and imaging. In the near future, iCMR promises novel procedures otherwise unsafe under standalone X-Ray guidance.
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Jalal Z, Seguela PE, Baruteau AE, Benoist D, Bernus O, Villemain O, Boudjemline Y, Iriart X, Thambo JB. Role of animal models for percutaneous atrial septal defect closure. J Thorac Dis 2018; 10:S2966-S2974. [PMID: 30305957 DOI: 10.21037/jtd.2018.07.119] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
As for any preclinical development of new implantable device, bench testing has been followed by experimental studies on large animal models for the development of atrial septal defect closure devices. Various models have been used according to studied species (porcine, ovine or canine model) and whether the septal defect was percutaneously or surgically created. Animal models of percutaneous atrial septal defect closure aim to assess the healing process and device endothelialisation, as well as the development of magnetic resonance imaging guided procedures, the short-term effects of volume overload on right ventricular contractility through haemodynamic studies and the understanding of other complications such as nickel hypersensitivity. Each technique has its own advantages and drawbacks, and leads to different punch-related, acute septal injuries that could have an effect on the healing process after device implantation. It has been suggested that some long-term, major device-related complications such as thrombosis or infective endocarditis may be associated with an inappropriate healing process or insufficient endothelialisation of the device, leading industrial companies to pay a great deal of attention to the healing process. Tissue reactions in animal models were shown to adequately reproduce the healing response after device implantation in humans, with an endothelial device coverage observed as early as 30 days after implantation and complete after 3 to 6 months. Research perspectives may evaluate both animal models and in-vitro studies in parallel with a view to clarify the endothelialisation process using human endothelial cells through in-vitro experiments. Self-sensing device for detecting the presence of endothelial cells on the surface of intracardiac occluders and high-resolution imaging techniques that could non-invasively assess the complete endothelialisation of a device would also be promising tools which would need large animal models studies before their clinical application.
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Affiliation(s)
- Zakaria Jalal
- Department of Paediatric and Adult Congenital Cardiology, Bordeaux University Hospital (CHU), F-33600 Pessac, France.,IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, F-33600 Pessac-Bordeaux, France.,Université de Bordeaux, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, F-33000 Bordeaux, France.,INSERM, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, F-33000 Bordeaux, France
| | - Pierre-Emmanuel Seguela
- Department of Paediatric and Adult Congenital Cardiology, Bordeaux University Hospital (CHU), F-33600 Pessac, France
| | - Alban-Elouen Baruteau
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, F-33600 Pessac-Bordeaux, France.,CHU Nantes, Fédération de Cardiologie Pédiatrique et Congénitale, Nantes, France.,L'institut du thorax, INSERM, CNRS, UNIV Nantes, CHU Nantes, Nantes, France.,Department of Congenital Cardiology, Evelina London Children's Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - David Benoist
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, F-33600 Pessac-Bordeaux, France.,Université de Bordeaux, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, F-33000 Bordeaux, France.,INSERM, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, F-33000 Bordeaux, France
| | - Olivier Bernus
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, F-33600 Pessac-Bordeaux, France.,Université de Bordeaux, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, F-33000 Bordeaux, France.,INSERM, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, F-33000 Bordeaux, France
| | - Olivier Villemain
- M3C-Necker Enfants malades, AP-HP, Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Younes Boudjemline
- Cardiac Catheterization Laboratories, Sidra Cardiac Program, Sidra Medical & Research Center, Doha, Qatar
| | - Xavier Iriart
- Department of Paediatric and Adult Congenital Cardiology, Bordeaux University Hospital (CHU), F-33600 Pessac, France.,IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, F-33600 Pessac-Bordeaux, France.,Université de Bordeaux, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, F-33000 Bordeaux, France.,INSERM, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, F-33000 Bordeaux, France
| | - Jean-Benoit Thambo
- Department of Paediatric and Adult Congenital Cardiology, Bordeaux University Hospital (CHU), F-33600 Pessac, France.,IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, F-33600 Pessac-Bordeaux, France.,Université de Bordeaux, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, F-33000 Bordeaux, France.,INSERM, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, F-33000 Bordeaux, France
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Abstract
Diagnostic and interventional cardiac catheterization is routinely used in the diagnosis and treatment of congenital heart disease. There are well-established concerns regarding the risk of radiation exposure to patients and staff, particularly in children given the cumulative effects of repeat exposure. Magnetic resonance imaging (MRI) offers the advantage of being able to provide better soft tissue visualization, tissue characterization, and quantification of ventricular volumes and vascular flow. Initial work using MRI catheterization employed fusion of x-ray and MRI techniques, with x-ray fluoroscopy to guide catheter placement and subsequent MRI assessment for anatomical and hemodynamic assessment. Image overlay of 3D previously acquired MRI datasets with live fluoroscopic imaging has also been used to guide catheter procedures.Hybrid x-ray and MRI-guided catheterization paved the way for clinical application and validation of this technique in the assessment of pulmonary vascular resistance and pharmacological stress studies. Purely MRI-guided catheterization also proved possible with passive catheter tracking. First-in-man MRI-guided cardiac catheter interventions were possible due to the development of MRI-compatible guidewires, but halted due to guidewire limitations.More recent developments in passive and active catheter tracking have led to improved visualization of catheters for MRI-guided catheterization. Improvements in hardware and software have also increased image quality and scanning times with better interactive tools for the operator in the MRI catheter suite to navigate through the anatomy as required in real time. This has expanded to MRI-guided electrophysiology studies and radiofrequency ablation in humans. Animal studies show promise for the utility of MRI-guided interventional catheterization. Ongoing investment and development of MRI-compatible guidewires will pave the way for MRI-guided diagnostic and interventional catheterization coming into the mainstream.
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Campbell-Washburn AE, Tavallaei MA, Pop M, Grant EK, Chubb H, Rhode K, Wright GA. Real-time MRI guidance of cardiac interventions. J Magn Reson Imaging 2017; 46:935-950. [PMID: 28493526 PMCID: PMC5675556 DOI: 10.1002/jmri.25749] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 03/29/2017] [Indexed: 11/09/2022] Open
Abstract
Cardiac magnetic resonance imaging (MRI) is appealing to guide complex cardiac procedures because it is ionizing radiation-free and offers flexible soft-tissue contrast. Interventional cardiac MR promises to improve existing procedures and enable new ones for complex arrhythmias, as well as congenital and structural heart disease. Guiding invasive procedures demands faster image acquisition, reconstruction and analysis, as well as intuitive intraprocedural display of imaging data. Standard cardiac MR techniques such as 3D anatomical imaging, cardiac function and flow, parameter mapping, and late-gadolinium enhancement can be used to gather valuable clinical data at various procedural stages. Rapid intraprocedural image analysis can extract and highlight critical information about interventional targets and outcomes. In some cases, real-time interactive imaging is used to provide a continuous stream of images displayed to interventionalists for dynamic device navigation. Alternatively, devices are navigated relative to a roadmap of major cardiac structures generated through fast segmentation and registration. Interventional devices can be visualized and tracked throughout a procedure with specialized imaging methods. In a clinical setting, advanced imaging must be integrated with other clinical tools and patient data. In order to perform these complex procedures, interventional cardiac MR relies on customized equipment, such as interactive imaging environments, in-room image display, audio communication, hemodynamic monitoring and recording systems, and electroanatomical mapping and ablation systems. Operating in this sophisticated environment requires coordination and planning. This review provides an overview of the imaging technology used in MRI-guided cardiac interventions. Specifically, this review outlines clinical targets, standard image acquisition and analysis tools, and the integration of these tools into clinical workflow. LEVEL OF EVIDENCE 1 Technical Efficacy: Stage 5 J. Magn. Reson. Imaging 2017;46:935-950.
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Affiliation(s)
- Adrienne E Campbell-Washburn
- Laboratory of Imaging Technology, Biochemistry and Biophysics Center, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Mohammad A Tavallaei
- Physical Sciences Platform and Schulich Heart Program, Sunnybrook Research Institute, Toronto, Ontario, Canada
- Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
| | - Mihaela Pop
- Physical Sciences Platform and Schulich Heart Program, Sunnybrook Research Institute, Toronto, Ontario, Canada
- Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
| | - Elena K Grant
- Laboratory of Imaging Technology, Biochemistry and Biophysics Center, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland, USA
- Department of Cardiology, Children's National Medical Center, Washington, DC, USA
| | - Henry Chubb
- Division of Imaging Sciences and Biomedical Engineering, King's College London, UK
| | - Kawal Rhode
- Division of Imaging Sciences and Biomedical Engineering, King's College London, UK
| | - Graham A Wright
- Physical Sciences Platform and Schulich Heart Program, Sunnybrook Research Institute, Toronto, Ontario, Canada
- Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
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9
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Thin film based semi-active resonant marker design for low profile interventional cardiovascular MRI devices. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2016; 30:93-101. [PMID: 27605033 DOI: 10.1007/s10334-016-0586-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 08/05/2016] [Accepted: 08/16/2016] [Indexed: 10/21/2022]
Abstract
OBJECTIVES A new microfabrication method to produce low profile radio frequency (RF) resonant markers on catheter shafts was developed. A semi-active RF resonant marker incorporating a solenoid and a plate capacitor was constructed on the distal shaft of a 5 Fr guiding catheter. The resulting device can be used for interventional cardiovascular MRI procedures. MATERIALS AND METHODS Unlike current semi-active device visualization techniques that require rigid and bulky analog circuit components (capacitor and solenoid), we fabricated a low profile RF resonant marker directly on guiding the catheter surface by thin film metal deposition and electroplating processes using a modified physical vapor deposition system. RESULTS The increase of the overall device profile thickness caused by the semi-active RF resonant marker (130 µm thick) was lowered by a factor of 4.6 compared with using the thinnest commercial non-magnetic and rigid circuit components (600 µm thick). Moreover, adequate visibility performance of the RF resonant marker in different orientations and overall RF safety were confirmed through in vitro experiments under MRI successfully. CONCLUSION The developed RF resonant marker on a clinical grade 5 Fr guiding catheter will enable several interventional congenital heart disease treatment procedures under MRI.
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10
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Lillaney PV, Yang JK, Losey AD, Martin AJ, Cooke DL, Thorne BRH, Barry DC, Chu A, Stillson C, Do L, Arenson RL, Saeed M, Wilson MW, Hetts SW. Endovascular MR-guided Renal Embolization by Using a Magnetically Assisted Remote-controlled Catheter System. Radiology 2016; 281:219-28. [PMID: 27019290 DOI: 10.1148/radiol.2016152036] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Purpose To assess the feasibility of a magnetically assisted remote-controlled (MARC) catheter system under magnetic resonance (MR) imaging guidance for performing a simple endovascular procedure (ie, renal artery embolization) in vivo and to compare with x-ray guidance to determine the value of MR imaging guidance and the specific areas where the MARC system can be improved. Materials and Methods In concordance with the Institutional Animal Care and Use Committee protocol, in vivo renal artery navigation and embolization were tested in three farm pigs (mean weight 43 kg ± 2 [standard deviation]) under real-time MR imaging at 1.5 T. The MARC catheter device was constructed by using an intramural copper-braided catheter connected to a laser-lithographed saddle coil at the distal tip. Interventionalists controlled an in-room cart that delivered electrical current to deflect the catheter in the MR imager. Contralateral kidneys were similarly embolized under x-ray guidance by using standard clinical catheters and guidewires. Changes in renal artery flow and perfusion were measured before and after embolization by using velocity-encoded and perfusion MR imaging. Catheter navigation times, renal parenchymal perfusion, and renal artery flow rates were measured for MR-guided and x-ray-guided embolization procedures and are presented as means ± standard deviation in this pilot study. Results Embolization was successful in all six kidneys under both x-ray and MR imaging guidance. Mean catheterization time with MR guidance was 93 seconds ± 56, compared with 60 seconds ± 22 for x-ray guidance. Mean changes in perfusion rates were 4.9 au/sec ± 0.8 versus 4.6 au/sec ± 0.6, and mean changes in renal flow rate were 2.1 mL/min/g ± 0.2 versus 1.9 mL/min/g ± 0.2 with MR imaging and x-ray guidance, respectively. Conclusion The MARC catheter system is feasible for renal artery catheterization and embolization under real-time MR imaging in vivo, and quantitative physiologic measures under MR imaging guidance were similar to those measured under x-ray guidance, suggesting that the MARC catheter system could be used for endovascular procedures with interventional MR imaging. (©) RSNA, 2016.
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Affiliation(s)
- Prasheel V Lillaney
- From the Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry St, Suite 350, Room 320, San Francisco, CA 94107-5705 (P.V.L., J.K.Y., A.D.L., A.J.M., D.L.C., B.R.H.T., C.S., L.D., R.L.A., M.S., M.W.W., S.W.H.); and Penumbra, Alameda, Calif (D.C.B., A.C.)
| | - Jeffrey K Yang
- From the Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry St, Suite 350, Room 320, San Francisco, CA 94107-5705 (P.V.L., J.K.Y., A.D.L., A.J.M., D.L.C., B.R.H.T., C.S., L.D., R.L.A., M.S., M.W.W., S.W.H.); and Penumbra, Alameda, Calif (D.C.B., A.C.)
| | - Aaron D Losey
- From the Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry St, Suite 350, Room 320, San Francisco, CA 94107-5705 (P.V.L., J.K.Y., A.D.L., A.J.M., D.L.C., B.R.H.T., C.S., L.D., R.L.A., M.S., M.W.W., S.W.H.); and Penumbra, Alameda, Calif (D.C.B., A.C.)
| | - Alastair J Martin
- From the Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry St, Suite 350, Room 320, San Francisco, CA 94107-5705 (P.V.L., J.K.Y., A.D.L., A.J.M., D.L.C., B.R.H.T., C.S., L.D., R.L.A., M.S., M.W.W., S.W.H.); and Penumbra, Alameda, Calif (D.C.B., A.C.)
| | - Daniel L Cooke
- From the Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry St, Suite 350, Room 320, San Francisco, CA 94107-5705 (P.V.L., J.K.Y., A.D.L., A.J.M., D.L.C., B.R.H.T., C.S., L.D., R.L.A., M.S., M.W.W., S.W.H.); and Penumbra, Alameda, Calif (D.C.B., A.C.)
| | - Bradford R H Thorne
- From the Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry St, Suite 350, Room 320, San Francisco, CA 94107-5705 (P.V.L., J.K.Y., A.D.L., A.J.M., D.L.C., B.R.H.T., C.S., L.D., R.L.A., M.S., M.W.W., S.W.H.); and Penumbra, Alameda, Calif (D.C.B., A.C.)
| | - David C Barry
- From the Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry St, Suite 350, Room 320, San Francisco, CA 94107-5705 (P.V.L., J.K.Y., A.D.L., A.J.M., D.L.C., B.R.H.T., C.S., L.D., R.L.A., M.S., M.W.W., S.W.H.); and Penumbra, Alameda, Calif (D.C.B., A.C.)
| | - Andrew Chu
- From the Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry St, Suite 350, Room 320, San Francisco, CA 94107-5705 (P.V.L., J.K.Y., A.D.L., A.J.M., D.L.C., B.R.H.T., C.S., L.D., R.L.A., M.S., M.W.W., S.W.H.); and Penumbra, Alameda, Calif (D.C.B., A.C.)
| | - Carol Stillson
- From the Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry St, Suite 350, Room 320, San Francisco, CA 94107-5705 (P.V.L., J.K.Y., A.D.L., A.J.M., D.L.C., B.R.H.T., C.S., L.D., R.L.A., M.S., M.W.W., S.W.H.); and Penumbra, Alameda, Calif (D.C.B., A.C.)
| | - Loi Do
- From the Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry St, Suite 350, Room 320, San Francisco, CA 94107-5705 (P.V.L., J.K.Y., A.D.L., A.J.M., D.L.C., B.R.H.T., C.S., L.D., R.L.A., M.S., M.W.W., S.W.H.); and Penumbra, Alameda, Calif (D.C.B., A.C.)
| | - Ronald L Arenson
- From the Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry St, Suite 350, Room 320, San Francisco, CA 94107-5705 (P.V.L., J.K.Y., A.D.L., A.J.M., D.L.C., B.R.H.T., C.S., L.D., R.L.A., M.S., M.W.W., S.W.H.); and Penumbra, Alameda, Calif (D.C.B., A.C.)
| | - Maythem Saeed
- From the Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry St, Suite 350, Room 320, San Francisco, CA 94107-5705 (P.V.L., J.K.Y., A.D.L., A.J.M., D.L.C., B.R.H.T., C.S., L.D., R.L.A., M.S., M.W.W., S.W.H.); and Penumbra, Alameda, Calif (D.C.B., A.C.)
| | - Mark W Wilson
- From the Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry St, Suite 350, Room 320, San Francisco, CA 94107-5705 (P.V.L., J.K.Y., A.D.L., A.J.M., D.L.C., B.R.H.T., C.S., L.D., R.L.A., M.S., M.W.W., S.W.H.); and Penumbra, Alameda, Calif (D.C.B., A.C.)
| | - Steven W Hetts
- From the Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry St, Suite 350, Room 320, San Francisco, CA 94107-5705 (P.V.L., J.K.Y., A.D.L., A.J.M., D.L.C., B.R.H.T., C.S., L.D., R.L.A., M.S., M.W.W., S.W.H.); and Penumbra, Alameda, Calif (D.C.B., A.C.)
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Abstract
Interventional cardiovascular magnetic resonance (iCMR) promises to enable radiation-free catheterization procedures and to enhance contemporary image guidance for structural heart and electrophysiological interventions. However, clinical translation of exciting pre-clinical interventions has been limited by availability of devices that are safe to use in the magnetic resonance (MR) environment. We discuss challenges and solutions for clinical translation, including MR-conditional and MR-safe device design, and how to configure an interventional suite. We review the recent advances that have already enabled diagnostic MR right heart catheterization and simple electrophysiologic ablation to be performed in humans and explore future clinical applications.
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12
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Schmidt EJ. Magnetic Resonance Imaging-Guided Cardiac Interventions. Magn Reson Imaging Clin N Am 2015; 23:563-77. [PMID: 26499275 DOI: 10.1016/j.mric.2015.05.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Performing intraoperative cardiovascular procedures inside an MR imaging scanner can potentially provide substantial advantage in clinical outcomes by reducing the risk and increasing the success rate relative to the way such procedures are performed today, in which the primary surgical guidance is provided by X-ray fluoroscopy, by electromagnetically tracked intraoperative devices, and by ultrasound. Both noninvasive and invasive cardiologists are becoming increasingly familiar with the capabilities of MR imaging for providing anatomic and physiologic information that is unequaled by other modalities. As a result, researchers began performing animal (preclinical) interventions in the cardiovascular system in the early 1990s.
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Affiliation(s)
- Ehud J Schmidt
- Radiology Department, Brigham and Women's Hospital, 221 Longwood Avenue, Room BRB 34C, Boston, MA 02115, USA.
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13
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Magnetic Resonance-Guided Passive Catheter Tracking for Endovascular Therapy. Magn Reson Imaging Clin N Am 2015; 23:591-605. [PMID: 26499277 DOI: 10.1016/j.mric.2015.05.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The use of MR guidance for endovascular intervention is appealing because of its lack of ionizing radiation, high-contrast visualization of vessel walls and adjacent soft tissues, multiplanar capabilities, and potential to incorporate functional information such as flow, fluid dynamics, perfusion, and cardiac motion. This review highlights state-of-the-art imaging techniques and hardware used for passive tracking of endovascular devices in interventional MR imaging, including negative contrast, passive contrast, nonproton multispectral, and direct current techniques. The advantages and disadvantages of passive tracking relative to active tracking are also summarized.
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14
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Pushparajah K, Tzifa A, Razavi R. Cardiac MRI catheterization: a 10-year single institution experience and review. Interv Cardiol 2014. [DOI: 10.2217/ica.14.28] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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15
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Bell JA, Saikus CE, Ratnayaka K, Barbash IM, Faranesh AZ, Franson DN, Sonmez M, Slack MC, Lederman RJ, Kocaturk O. Active delivery cable tuned to device deployment state: enhanced visibility of nitinol occluders during preclinical interventional MRI. J Magn Reson Imaging 2012; 36:972-8. [PMID: 22707441 PMCID: PMC3445770 DOI: 10.1002/jmri.23722] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Accepted: 05/07/2012] [Indexed: 11/10/2022] Open
Abstract
PURPOSE To develop an active delivery system that enhances visualization of nitinol cardiac occluder devices during deployment under real-time magnetic resonance imaging (MRI). MATERIALS AND METHODS We constructed an active delivery cable incorporating a loopless antenna and a custom titanium microscrew to secure the occluder devices. The delivery cable was tuned and matched to 50Ω at 64 MHz with the occluder device attached. We used real-time balanced steady state free precession in a wide-bore 1.5T scanner. Device-related images were reconstructed separately and combined with surface-coil images. The delivery cable was tested in vitro in a phantom and in vivo in swine using a variety of nitinol cardiac occluder devices. RESULTS In vitro, the active delivery cable provided little signal when the occluder device was detached and maximal signal with the device attached. In vivo, signal from the active delivery cable enabled clear visualization of occluder device during positioning and deployment. Device release resulted in decreased signal from the active cable. Postmortem examination confirmed proper device placement. CONCLUSION The active delivery cable enhanced the MRI depiction of nitinol cardiac occluder devices during positioning and deployment, both in conventional and novel applications. We expect enhanced visibility to contribute to the effectiveness and safety of new and emerging MRI-guided treatments.
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Affiliation(s)
- Jamie A. Bell
- Cardiovascular and Pulmonary Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Christina E. Saikus
- Cardiovascular and Pulmonary Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Kanishka Ratnayaka
- Cardiovascular and Pulmonary Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD
- Cardiology Division, Children’s National Medical Center, Washington, DC
| | - Israel M. Barbash
- Cardiovascular and Pulmonary Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Anthony Z. Faranesh
- Cardiovascular and Pulmonary Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Dominique N. Franson
- Cardiovascular and Pulmonary Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Merdim Sonmez
- Cardiovascular and Pulmonary Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Michael C. Slack
- Cardiology Division, Children’s National Medical Center, Washington, DC
| | - Robert J. Lederman
- Cardiovascular and Pulmonary Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Ozgur Kocaturk
- Cardiovascular and Pulmonary Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD
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16
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Tzifa A, Schaeffter T, Razavi R. MR imaging-guided cardiovascular interventions in young children. Magn Reson Imaging Clin N Am 2012; 20:117-28. [PMID: 22118596 DOI: 10.1016/j.mric.2011.08.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Abstract
Diagnostic cardiac catheterization procedures in children have been largely replaced by magnetic resonance (MR) imaging studies. However, when invasive catheterization is required, MR imaging has a significant role to play, when combined with invasive pressure measurements. Beyond the established reduction to the radiation dose involved, solely MR image-guided or MR image-assisted catheterization procedures can accurately address clinical questions, such as estimation of pulmonary vascular resistance and cardiac output response to stress, without needing to perform laborious measurements that are prone to errors. This article describes MR image-guided or MR image-assisted cardiac catheterization procedures for diagnosis and intervention in children.
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Affiliation(s)
- Aphrodite Tzifa
- Division of Imaging Sciences, King's College London BHF Centre, NIHR Biomedical Research Centre at Guy's & St Thomas' Hospital NHS Foundation Trust, UK.
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17
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Roy D, Sharma R, Bunce N, Ward D, Brecker SJ. Selecting the optimal closure device in patients with atrial septal defects and patent foramen ovale. Interv Cardiol 2012. [DOI: 10.2217/ica.11.90] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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18
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Saeed M, Hetts SW, English J, Wilson M. MR fluoroscopy in vascular and cardiac interventions (review). Int J Cardiovasc Imaging 2012; 28:117-37. [PMID: 21359519 PMCID: PMC3275732 DOI: 10.1007/s10554-010-9774-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2010] [Accepted: 12/13/2010] [Indexed: 12/22/2022]
Abstract
Vascular and cardiac disease remains a leading cause of morbidity and mortality in developed and emerging countries. Vascular and cardiac interventions require extensive fluoroscopic guidance to navigate endovascular catheters. X-ray fluoroscopy is considered the current modality for real time imaging. It provides excellent spatial and temporal resolution, but is limited by exposure of patients and staff to ionizing radiation, poor soft tissue characterization and lack of quantitative physiologic information. MR fluoroscopy has been introduced with substantial progress during the last decade. Clinical and experimental studies performed under MR fluoroscopy have indicated the suitability of this modality for: delivery of ASD closure, aortic valves, and endovascular stents (aortic, carotid, iliac, renal arteries, inferior vena cava). It aids in performing ablation, creation of hepatic shunts and local delivery of therapies. Development of more MR compatible equipment and devices will widen the applications of MR-guided procedures. At post-intervention, MR imaging aids in assessing the efficacy of therapies, success of interventions. It also provides information on vascular flow and cardiac morphology, function, perfusion and viability. MR fluoroscopy has the potential to form the basis for minimally invasive image-guided surgeries that offer improved patient management and cost effectiveness.
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Affiliation(s)
- Maythem Saeed
- Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA 94107-1701, USA.
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19
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Tzifa A, Krombach GA, Krämer N, Krüger S, Schütte A, von Walter M, Schaeffter T, Qureshi S, Krasemann T, Rosenthal E, Schwartz CA, Varma G, Buhl A, Kohlmeier A, Bücker A, Günther RW, Razavi R. Magnetic Resonance–Guided Cardiac Interventions Using Magnetic Resonance–Compatible Devices. Circ Cardiovasc Interv 2010; 3:585-92. [DOI: 10.1161/circinterventions.110.957209] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background—
Percutaneous cardiac interventions are currently performed under x-ray guidance. Magnetic resonance imaging (MRI) has been used to guide intravascular interventions in the past, but mainly in animals. Translation of MR-guided interventions into humans has been limited by the lack of MR-compatible and safe equipment, such as MR guide wires with mechanical characteristics similar to standard guide wires. The aim of the present study was to evaluate the safety and efficacy of a newly developed MR-safe and compatible passive guide wire in aiding MR-guided cardiac interventions in a swine model and describe the 2 first-in-man solely MR-guided interventions.
Methods and Results—
In the preclinical trial, the new MR-compatible wire aided the performance of 20 interventions in 5 swine. These consisted of balloon dilation of nondiseased pulmonary and aortic valves, aortic arch, and branch pulmonary arteries. After ethics and regulatory authority approval, the 2 first-in-man MR-guided interventions were performed in a child and an adult, both with elements of valvar pulmonary stenosis. Catheter manipulations were monitored with real-time MRI sequence with interactive modification of imaging plane and slice position. Temporal resolution was 11 to 12 frames/s. Catheterization procedure times were 110 and 80 minutes, respectively. Both patients had successful relief of the valvar stenosis and no procedural complications.
Conclusions—
The described preclinical study and case reports are encouraging that with the availability of the new MR-compatible and safe guide wire, certain percutaneous cardiac interventions will become feasible to perform solely under MR guidance in the future. A clinical trial is underway in our institution.
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Affiliation(s)
- Aphrodite Tzifa
- From King's College London BHF Centre (A.T., T.S., S.Q., G.V., R.R.), Division of Imaging Sciences, NIHR Biomedical, Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom; the Pediatric Cardiology Department (A.T., S.Q., T.K., E.R., R.R.), Evelina Children's Hospital, Guy's and St Thomas' Hospital, London, United Kingdom; the Department of Diagnostic Radiology (G.A.K., N.K., C.A.S., A.K., A.B., R.W.G.), University Hospital Aachen, Aachen, Germany; Philips Research
| | - Gabriele A. Krombach
- From King's College London BHF Centre (A.T., T.S., S.Q., G.V., R.R.), Division of Imaging Sciences, NIHR Biomedical, Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom; the Pediatric Cardiology Department (A.T., S.Q., T.K., E.R., R.R.), Evelina Children's Hospital, Guy's and St Thomas' Hospital, London, United Kingdom; the Department of Diagnostic Radiology (G.A.K., N.K., C.A.S., A.K., A.B., R.W.G.), University Hospital Aachen, Aachen, Germany; Philips Research
| | - Nils Krämer
- From King's College London BHF Centre (A.T., T.S., S.Q., G.V., R.R.), Division of Imaging Sciences, NIHR Biomedical, Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom; the Pediatric Cardiology Department (A.T., S.Q., T.K., E.R., R.R.), Evelina Children's Hospital, Guy's and St Thomas' Hospital, London, United Kingdom; the Department of Diagnostic Radiology (G.A.K., N.K., C.A.S., A.K., A.B., R.W.G.), University Hospital Aachen, Aachen, Germany; Philips Research
| | - Sascha Krüger
- From King's College London BHF Centre (A.T., T.S., S.Q., G.V., R.R.), Division of Imaging Sciences, NIHR Biomedical, Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom; the Pediatric Cardiology Department (A.T., S.Q., T.K., E.R., R.R.), Evelina Children's Hospital, Guy's and St Thomas' Hospital, London, United Kingdom; the Department of Diagnostic Radiology (G.A.K., N.K., C.A.S., A.K., A.B., R.W.G.), University Hospital Aachen, Aachen, Germany; Philips Research
| | - Adrian Schütte
- From King's College London BHF Centre (A.T., T.S., S.Q., G.V., R.R.), Division of Imaging Sciences, NIHR Biomedical, Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom; the Pediatric Cardiology Department (A.T., S.Q., T.K., E.R., R.R.), Evelina Children's Hospital, Guy's and St Thomas' Hospital, London, United Kingdom; the Department of Diagnostic Radiology (G.A.K., N.K., C.A.S., A.K., A.B., R.W.G.), University Hospital Aachen, Aachen, Germany; Philips Research
| | - Matthias von Walter
- From King's College London BHF Centre (A.T., T.S., S.Q., G.V., R.R.), Division of Imaging Sciences, NIHR Biomedical, Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom; the Pediatric Cardiology Department (A.T., S.Q., T.K., E.R., R.R.), Evelina Children's Hospital, Guy's and St Thomas' Hospital, London, United Kingdom; the Department of Diagnostic Radiology (G.A.K., N.K., C.A.S., A.K., A.B., R.W.G.), University Hospital Aachen, Aachen, Germany; Philips Research
| | - Tobias Schaeffter
- From King's College London BHF Centre (A.T., T.S., S.Q., G.V., R.R.), Division of Imaging Sciences, NIHR Biomedical, Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom; the Pediatric Cardiology Department (A.T., S.Q., T.K., E.R., R.R.), Evelina Children's Hospital, Guy's and St Thomas' Hospital, London, United Kingdom; the Department of Diagnostic Radiology (G.A.K., N.K., C.A.S., A.K., A.B., R.W.G.), University Hospital Aachen, Aachen, Germany; Philips Research
| | - Shakeel Qureshi
- From King's College London BHF Centre (A.T., T.S., S.Q., G.V., R.R.), Division of Imaging Sciences, NIHR Biomedical, Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom; the Pediatric Cardiology Department (A.T., S.Q., T.K., E.R., R.R.), Evelina Children's Hospital, Guy's and St Thomas' Hospital, London, United Kingdom; the Department of Diagnostic Radiology (G.A.K., N.K., C.A.S., A.K., A.B., R.W.G.), University Hospital Aachen, Aachen, Germany; Philips Research
| | - Thomas Krasemann
- From King's College London BHF Centre (A.T., T.S., S.Q., G.V., R.R.), Division of Imaging Sciences, NIHR Biomedical, Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom; the Pediatric Cardiology Department (A.T., S.Q., T.K., E.R., R.R.), Evelina Children's Hospital, Guy's and St Thomas' Hospital, London, United Kingdom; the Department of Diagnostic Radiology (G.A.K., N.K., C.A.S., A.K., A.B., R.W.G.), University Hospital Aachen, Aachen, Germany; Philips Research
| | - Eric Rosenthal
- From King's College London BHF Centre (A.T., T.S., S.Q., G.V., R.R.), Division of Imaging Sciences, NIHR Biomedical, Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom; the Pediatric Cardiology Department (A.T., S.Q., T.K., E.R., R.R.), Evelina Children's Hospital, Guy's and St Thomas' Hospital, London, United Kingdom; the Department of Diagnostic Radiology (G.A.K., N.K., C.A.S., A.K., A.B., R.W.G.), University Hospital Aachen, Aachen, Germany; Philips Research
| | - Claudia A. Schwartz
- From King's College London BHF Centre (A.T., T.S., S.Q., G.V., R.R.), Division of Imaging Sciences, NIHR Biomedical, Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom; the Pediatric Cardiology Department (A.T., S.Q., T.K., E.R., R.R.), Evelina Children's Hospital, Guy's and St Thomas' Hospital, London, United Kingdom; the Department of Diagnostic Radiology (G.A.K., N.K., C.A.S., A.K., A.B., R.W.G.), University Hospital Aachen, Aachen, Germany; Philips Research
| | - Gopal Varma
- From King's College London BHF Centre (A.T., T.S., S.Q., G.V., R.R.), Division of Imaging Sciences, NIHR Biomedical, Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom; the Pediatric Cardiology Department (A.T., S.Q., T.K., E.R., R.R.), Evelina Children's Hospital, Guy's and St Thomas' Hospital, London, United Kingdom; the Department of Diagnostic Radiology (G.A.K., N.K., C.A.S., A.K., A.B., R.W.G.), University Hospital Aachen, Aachen, Germany; Philips Research
| | - Alexandra Buhl
- From King's College London BHF Centre (A.T., T.S., S.Q., G.V., R.R.), Division of Imaging Sciences, NIHR Biomedical, Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom; the Pediatric Cardiology Department (A.T., S.Q., T.K., E.R., R.R.), Evelina Children's Hospital, Guy's and St Thomas' Hospital, London, United Kingdom; the Department of Diagnostic Radiology (G.A.K., N.K., C.A.S., A.K., A.B., R.W.G.), University Hospital Aachen, Aachen, Germany; Philips Research
| | - Antonia Kohlmeier
- From King's College London BHF Centre (A.T., T.S., S.Q., G.V., R.R.), Division of Imaging Sciences, NIHR Biomedical, Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom; the Pediatric Cardiology Department (A.T., S.Q., T.K., E.R., R.R.), Evelina Children's Hospital, Guy's and St Thomas' Hospital, London, United Kingdom; the Department of Diagnostic Radiology (G.A.K., N.K., C.A.S., A.K., A.B., R.W.G.), University Hospital Aachen, Aachen, Germany; Philips Research
| | - Arno Bücker
- From King's College London BHF Centre (A.T., T.S., S.Q., G.V., R.R.), Division of Imaging Sciences, NIHR Biomedical, Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom; the Pediatric Cardiology Department (A.T., S.Q., T.K., E.R., R.R.), Evelina Children's Hospital, Guy's and St Thomas' Hospital, London, United Kingdom; the Department of Diagnostic Radiology (G.A.K., N.K., C.A.S., A.K., A.B., R.W.G.), University Hospital Aachen, Aachen, Germany; Philips Research
| | - Rolf W. Günther
- From King's College London BHF Centre (A.T., T.S., S.Q., G.V., R.R.), Division of Imaging Sciences, NIHR Biomedical, Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom; the Pediatric Cardiology Department (A.T., S.Q., T.K., E.R., R.R.), Evelina Children's Hospital, Guy's and St Thomas' Hospital, London, United Kingdom; the Department of Diagnostic Radiology (G.A.K., N.K., C.A.S., A.K., A.B., R.W.G.), University Hospital Aachen, Aachen, Germany; Philips Research
| | - Reza Razavi
- From King's College London BHF Centre (A.T., T.S., S.Q., G.V., R.R.), Division of Imaging Sciences, NIHR Biomedical, Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom; the Pediatric Cardiology Department (A.T., S.Q., T.K., E.R., R.R.), Evelina Children's Hospital, Guy's and St Thomas' Hospital, London, United Kingdom; the Department of Diagnostic Radiology (G.A.K., N.K., C.A.S., A.K., A.B., R.W.G.), University Hospital Aachen, Aachen, Germany; Philips Research
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Cleary K, Peters TM. Image-guided interventions: technology review and clinical applications. Annu Rev Biomed Eng 2010; 12:119-42. [PMID: 20415592 DOI: 10.1146/annurev-bioeng-070909-105249] [Citation(s) in RCA: 212] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Image-guided interventions are medical procedures that use computer-based systems to provide virtual image overlays to help the physician precisely visualize and target the surgical site. This field has been greatly expanded by the advances in medical imaging and computing power over the past 20 years. This review begins with a historical overview and then describes the component technologies of tracking, registration, visualization, and software. Clinical applications in neurosurgery, orthopedics, and the cardiac and thoracoabdominal areas are discussed, together with a description of an evolving technology named Natural Orifice Transluminal Endoscopic Surgery (NOTES). As the trend toward minimally invasive procedures continues, image-guided interventions will play an important role in enabling new procedures, while improving the accuracy and success of existing approaches. Despite this promise, the role of image-guided systems must be validated by clinical trials facilitated by partnerships between scientists and physicians if this field is to reach its full potential.
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Affiliation(s)
- Kevin Cleary
- Imaging Science and Information Systems (ISIS) Center, Department of Radiology, Georgetown University Medical Center, Washington, DC 20007, USA.
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21
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Quaife RA, Chen MY, Kim M, Klein AJP, Jehle A, Kay J, Groves BM, Carroll JD. Pre-procedural planning for percutaneous atrial septal defect closure: transesophageal echocardiography compared with cardiac computed tomographic angiography. J Cardiovasc Comput Tomogr 2010; 4:330-8. [PMID: 20947043 DOI: 10.1016/j.jcct.2010.08.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2010] [Revised: 07/14/2010] [Accepted: 08/09/2010] [Indexed: 11/15/2022]
Abstract
BACKGROUND The safety and efficacy of percutaneous closure of atrial septal defects (ASDs) is determined by several variables, including defect size, presence of adequate rim tissue, relationship to other cardiac structures, and associated congenital anomalies. OBJECTIVE We sought to determine the accuracy of computed tomographic angiography (CTA) in predicting a defect's size compared with pre-procedural transesophageal echocardiography (TEE) and to the current "gold standard" balloon sizing by intracardiac echocardiography (ICE). METHODS Thirty-five consecutive patients referred for possible percutaneous closure of suspected secundum ASD were evaluated with gated multislice CTA after initial TEE screening. Axial and sagittal image planes of the ASD from the CTA multiplanar reformation (MPR) images were used to measure the defect size and surface area. RESULTS Of the 35 patients with secundum-type ASDs, 5 subjects had disqualifying anatomy by CTA and 2 had an unsuccessful closure, resulting in a procedural success rate of 93%. Measurement of defect area by gated MPR images provided the strongest correlate to ICE balloon size. In large ASDs, TEE was less well correlated to the maximum defect size and identification of the inferior/inferoposterior rims than CTA. CONCLUSIONS Cardiac CTA is an accurate and useful technique for pre-procedural assessment of ASDs and may be superior to conventional TEE in large defects that have deficient inferior rims.
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Affiliation(s)
- Robert A Quaife
- Advanced Cardiac Imaging, Department of Medicine and Radiology, University of Colorado Health Sciences Center, PO Box 6511 Leprino Building 532, Cardiac and Vascular Center, 12401 E 17th Avenue, Aurora, CO 80045, USA.
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22
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Lee SL, Lerotic M, Vitiello V, Giannarou S, Kwok KW, Visentini-Scarzanella M, Yang GZ. From medical images to minimally invasive intervention: Computer assistance for robotic surgery. Comput Med Imaging Graph 2010; 34:33-45. [DOI: 10.1016/j.compmedimag.2009.07.007] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2009] [Revised: 06/26/2009] [Accepted: 07/17/2009] [Indexed: 01/10/2023]
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23
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Ratnayaka K, Lederman RJ. Interventional cardiovascular MR—The next stage in pediatric cardiology. PROGRESS IN PEDIATRIC CARDIOLOGY 2010. [DOI: 10.1016/j.ppedcard.2009.10.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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24
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Saikus CE, Lederman RJ. Interventional cardiovascular magnetic resonance imaging: a new opportunity for image-guided interventions. JACC Cardiovasc Imaging 2009; 2:1321-31. [PMID: 19909937 PMCID: PMC2843404 DOI: 10.1016/j.jcmg.2009.09.002] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2009] [Revised: 09/10/2009] [Accepted: 09/11/2009] [Indexed: 01/12/2023]
Abstract
Cardiovascular magnetic resonance (CMR) combines excellent soft-tissue contrast, multiplanar views, and dynamic imaging of cardiac function without ionizing radiation exposure. Interventional cardiovascular magnetic resonance (iCMR) leverages these features to enhance conventional interventional procedures or to enable novel ones. Although still awaiting clinical deployment, this young field has tremendous potential. We survey promising clinical applications for iCMR. Next, we discuss the technologies that allow CMR-guided interventions and, finally, what still needs to be done to bring them to the clinic.
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Affiliation(s)
- Christina E Saikus
- Translational Medicine Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, NIH, Bethesda, MD 20892-1538, USA
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25
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Ratnayaka K, Faranesh AZ, Guttman MA, Kocaturk O, Saikus CE, Lederman RJ. Interventional cardiovascular magnetic resonance: still tantalizing. J Cardiovasc Magn Reson 2008; 10:62. [PMID: 19114017 PMCID: PMC2637847 DOI: 10.1186/1532-429x-10-62] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2008] [Accepted: 12/29/2008] [Indexed: 12/30/2022] Open
Abstract
The often touted advantages of MR guidance remain largely unrealized for cardiovascular interventional procedures in patients. Many procedures have been simulated in animal models. We argue these opportunities for clinical interventional MR will be met in the near future. This paper reviews technical and clinical considerations and offers advice on how to implement a clinical-grade interventional cardiovascular MR (iCMR) laboratory. We caution that this reflects our personal view of the "state of the art."
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Affiliation(s)
- Kanishka Ratnayaka
- Translational Medicine Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland, USA
- Cardiology Division, Children's National Medical Center, Washington, DC, USA
| | - Anthony Z Faranesh
- Translational Medicine Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Michael A Guttman
- Translational Medicine Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Ozgur Kocaturk
- Translational Medicine Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Christina E Saikus
- Translational Medicine Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Robert J Lederman
- Translational Medicine Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland, USA
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26
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Nazarian S, Kolandaivelu A, Zviman MM, Meininger GR, Kato R, Susil RC, Roguin A, Dickfeld TL, Ashikaga H, Calkins H, Berger RD, Bluemke DA, Lardo AC, Halperin HR. Feasibility of real-time magnetic resonance imaging for catheter guidance in electrophysiology studies. Circulation 2008; 118:223-9. [PMID: 18574048 DOI: 10.1161/circulationaha.107.742452] [Citation(s) in RCA: 142] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Compared with fluoroscopy, the current imaging standard of care for guidance of electrophysiology procedures, magnetic resonance imaging (MRI) provides improved soft-tissue resolution and eliminates radiation exposure. However, because of inherent magnetic forces and electromagnetic interference, the MRI environment poses challenges for electrophysiology procedures. In this study, we sought to test the feasibility of performing electrophysiology studies with real-time MRI guidance. METHODS AND RESULTS An MRI-compatible electrophysiology system was developed. Catheters were targeted to the right atrium, His bundle, and right ventricle of 10 mongrel dogs (23 to 32 kg) via a 1.5-T MRI system using rapidly acquired fast gradient-echo images (approximately 5 frames per second). Catheters were successfully positioned at the right atrial, His bundle, and right ventricular target sites of all animals. Comprehensive electrophysiology studies with recording of intracardiac electrograms and atrial and ventricular pacing were performed. Postprocedural pathological evaluation revealed no evidence of thermal injury to the myocardium. After proof of safety in animal studies, limited real-time MRI-guided catheter mapping studies were performed in 2 patients. Adequate target catheter localization was confirmed via recording of intracardiac electrograms in both patients. CONCLUSIONS To the best of our knowledge, this is the first study to report the feasibility of real-time MRI-guided electrophysiology procedures. This technique may eliminate patient and staff radiation exposure and improve real-time soft tissue resolution for procedural guidance.
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Affiliation(s)
- Saman Nazarian
- Department of Medicine, Division of Cardiology, Johns Hopkins Hospital, Carnegie 592C, 600 N Wolfe St, Baltimore, MD 21287, USA.
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27
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Abstract
The purpose of this article is to review the current state of the art with respect to intravascular magnetic resonance imaging, including intravascular coils, their implementation for plaque identification and characterization, and strategies for future approaches to coronary imaging and other cardiovascular applications.
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28
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Bhindi R, Bull S, Schrale RG, Wilson N, Ormerod OJ. Surgery Insight: percutaneous treatment of prosthetic paravalvular leaks. ACTA ACUST UNITED AC 2008; 5:140-7. [DOI: 10.1038/ncpcardio1112] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2007] [Accepted: 11/29/2007] [Indexed: 11/09/2022]
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29
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Raman VK, Lederman RJ. Interventional cardiovascular magnetic resonance imaging. Trends Cardiovasc Med 2007; 17:196-202. [PMID: 17662914 PMCID: PMC2291392 DOI: 10.1016/j.tcm.2007.05.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2007] [Revised: 05/01/2007] [Accepted: 05/03/2007] [Indexed: 11/26/2022]
Abstract
Magnetic resonance imaging provides structural and functional cardiovascular information with excellent soft tissue contrast. Real-time magnetic resonance imaging can guide transcatheter cardiovascular interventions in large animal models and may prove superior to x-ray and adjunct modalities for peripheral vascular, structural heart, and cardiac electrophysiology applications. We describe technical considerations, preclinical work, and early clinical studies in this emerging field.
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Affiliation(s)
- Venkatesh K Raman
- Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892-1538, USA
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30
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Ye Y, Bogaert J. Cell therapy in myocardial infarction: emphasis on the role of MRI. Eur Radiol 2007; 18:548-69. [DOI: 10.1007/s00330-007-0777-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2007] [Revised: 08/31/2007] [Accepted: 09/04/2007] [Indexed: 01/14/2023]
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31
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Raman VK, Lederman RJ. Advances in interventional cardiovascular MRI. CURRENT CARDIOVASCULAR RISK REPORTS 2007. [DOI: 10.1007/s12170-007-0050-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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32
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Lee T, Tsai IC, Fu YC, Jan SL, Wang CC, Chang Y, Chen MC. MDCT Evaluation After Closure of Atrial Septal Defect with an Amplatzer Septal Occluder. AJR Am J Roentgenol 2007; 188:W431-9. [PMID: 17449739 DOI: 10.2214/ajr.06.0709] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVE The essay describes the protocol for and interpretation of MDCT scans in the evaluation of patients after insertion of an Amplatzer septal occluder. CONCLUSION In anatomic regions that cannot be confidently evaluated with transthoracic echocardiography, MDCT is useful for evaluating Amplatzer septal occluders for protrusion, migration, and residual shunt. Radiologists should be familiar with the imaging protocol and interpretation.
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Affiliation(s)
- Tain Lee
- Department of Radiology, Taichung Veterans General Hospital, Taichung Harbor Rd., Taichung 407, Taiwan, Republic of China
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33
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Abstract
Because of its superior soft tissue imaging, MRI has become a valuable diagnostic tool in cardiovascular disease. These strengths make MRI attractive to guide therapeutic catheter-based procedures, both conventional and novel. We review how to configure an interventional MRI suite, how MRI catheter devices differ from conventional radiographic catheters, and finally developments in preclinical and investigational clinical applications.
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Affiliation(s)
- Venkatesh K Raman
- Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892-1538, USA
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34
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Raval AN, Karmarkar PV, Guttman MA, Ozturk C, DeSilva R, Aviles RJ, Wright VJ, Schenke WH, Atalar E, McVeigh ER, Lederman RJ. Real-time MRI guided atrial septal puncture and balloon septostomy in swine. Catheter Cardiovasc Interv 2006; 67:637-43. [PMID: 16532499 PMCID: PMC1463249 DOI: 10.1002/ccd.20579] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Cardiac perforation during atrial septal puncture (ASP) might be avoided by improved image guidance. X-ray fluoroscopy (XRF), which guides ASP, visualizes tissue poorly and does not convey depth information. Ultrasound is limited by device shadows and constrained imaging windows. Alternatively, real-time MRI (rtMRI) provides excellent tissue contrast in any orientation and may enable ASP and balloon atrial septostomy (BAS) in swine. Custom MRI catheters incorporated "active" (receiver antenna) and "passive" (iron or gadolinium) elements. Wholly rtMRI-guided transfemoral ASP and BAS were performed in 10 swine in a 1.5T interventional suite. Hemodynamic results were measured with catheters and velocity encoded MRI. Successful ASP was performed in all 10 animals. Necropsy confirmed septostomy confined within the fossa ovalis in all. BAS was successful in 9/10 animals. Antenna failure in a re-used needle led to inadvertent vena cava tear prior to BAS in 1 animal. ASP in the same animal was easily performed using a new needle. rtMRI illustrated clear device-tissue-lumen relationships in multiple orientations, and facilitated simple ASP and BAS. The mean procedure time was 19 +/- 10 minutes. Septostomy achieved a mean left to right shunt ratio of 1.3:1 in these healthy animals. Interactive rtMRI permits rapid transcatheter ASP and BAS in swine. Further technical development may enable novel applications.
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Affiliation(s)
- Amish N. Raval
- From the Cardiovascular Branch (ANR, PVK, CO, RDS, RJA, VJW, WHS, RJL) and the
| | - Parag V. Karmarkar
- From the Cardiovascular Branch (ANR, PVK, CO, RDS, RJA, VJW, WHS, RJL) and the
- Department of Radiology, The Johns Hopkins University, Baltimore, MD, USA
| | - Michael A. Guttman
- Laboratory of Cardiac Energetics (MAG, ERM), Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA; and
| | - Cengizhan Ozturk
- From the Cardiovascular Branch (ANR, PVK, CO, RDS, RJA, VJW, WHS, RJL) and the
| | - Ranil DeSilva
- From the Cardiovascular Branch (ANR, PVK, CO, RDS, RJA, VJW, WHS, RJL) and the
| | - Ronnier J. Aviles
- From the Cardiovascular Branch (ANR, PVK, CO, RDS, RJA, VJW, WHS, RJL) and the
| | - Victor J. Wright
- From the Cardiovascular Branch (ANR, PVK, CO, RDS, RJA, VJW, WHS, RJL) and the
| | - William H. Schenke
- From the Cardiovascular Branch (ANR, PVK, CO, RDS, RJA, VJW, WHS, RJL) and the
| | - Ergin Atalar
- Department of Radiology, The Johns Hopkins University, Baltimore, MD, USA
| | - Elliot R. McVeigh
- Laboratory of Cardiac Energetics (MAG, ERM), Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA; and
| | - Robert J. Lederman
- From the Cardiovascular Branch (ANR, PVK, CO, RDS, RJA, VJW, WHS, RJL) and the
- Address for Correspondence: Robert J. Lederman, MD, Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Building 10, Room 2c713, MSC 1538, Bethesda, MD 20892-1538, USA. Telephone: 1-301-402-6769.
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35
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Abstract
Contemporary imaging modalities can now provide the surgeon with high quality three- and four-dimensional images depicting not only normal anatomy and pathology, but also vascularity and function. A key component of image-guided surgery (IGS) is the ability to register multi-modal pre-operative images to each other and to the patient. The other important component of IGS is the ability to track instruments in real time during the procedure and to display them as part of a realistic model of the operative volume. Stereoscopic, virtual- and augmented-reality techniques have been implemented to enhance the visualization and guidance process. For the most part, IGS relies on the assumption that the pre-operatively acquired images used to guide the surgery accurately represent the morphology of the tissue during the procedure. This assumption may not necessarily be valid, and so intra-operative real-time imaging using interventional MRI, ultrasound, video and electrophysiological recordings are often employed to ameliorate this situation. Although IGS is now in extensive routine clinical use in neurosurgery and is gaining ground in other surgical disciplines, there remain many drawbacks that must be overcome before it can be employed in more general minimally-invasive procedures. This review overviews the roots of IGS in neurosurgery, provides examples of its use outside the brain, discusses the infrastructure required for successful implementation of IGS approaches and outlines the challenges that must be overcome for IGS to advance further.
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Affiliation(s)
- Terry M Peters
- Robarts Research Institute, University of Western Ontario, PO Box 5015, 100 Perth Drive, London, ON N6A 5K8, Canada.
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36
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Affiliation(s)
- Alexander J Dick
- Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892-1538, USA
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37
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38
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Abstract
Over the last 10 years, a number of technological advances have allowed real-time magnetic resonance imaging to guide cardiac catheterization, including improved image quality, faster scanning times, and open magnets allowing access to the patient. Potential advantages include better soft tissue imaging to improve catheter manipulation and additional functional information to assist with interventional decision-making, all without exposure to ionizing radiation. MRI-guided diagnostic catheterization, balloon dilation, stent placement, valvar replacement, atrial septal defect closure, and radiofrequency ablation all have been shown feasible in animal models. MRI-guided catheterization has the potential to replace the current X-ray-based diagnostic and interventional procedures for children with congenital heart disease, avoiding all radiation exposure while improving soft tissue imaging.
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Affiliation(s)
- Phillip Moore
- Department of Pediatrics, University of California, San Francisco, 94143, USA.
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39
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Affiliation(s)
- Robert J Lederman
- Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892-1538, USA.
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40
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Raval AN, Karmarkar PV, Guttman MA, Ozturk C, Sampath S, DeSilva R, Aviles RJ, Xu M, Wright VJ, Schenke WH, Kocaturk O, Dick AJ, Raman VK, Atalar E, McVeigh ER, Lederman RJ. Real-time magnetic resonance imaging-guided endovascular recanalization of chronic total arterial occlusion in a swine model. Circulation 2006; 113:1101-7. [PMID: 16490819 PMCID: PMC1428785 DOI: 10.1161/circulationaha.105.586727] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Endovascular recanalization (guidewire traversal) of peripheral artery chronic total occlusion (CTO) can be challenging. X-ray angiography resolves CTO poorly. Virtually "blind" device advancement during x-ray-guided interventions can lead to procedure failure, perforation, and hemorrhage. Alternatively, MRI may delineate the artery within the occluded segment to enhance procedural safety and success. We hypothesized that real-time MRI (rtMRI)-guided CTO recanalization can be accomplished in an animal model. METHODS AND RESULTS Carotid artery CTO was created by balloon injury in 19 lipid-overfed swine. After 6 to 8 weeks, 2 underwent direct necropsy analysis for histology, 3 underwent primary x-ray-guided CTO recanalization attempts, and the remaining 14 underwent rtMRI-guided recanalization attempts in a 1.5-T interventional MRI system. Real-time MRI intervention used custom CTO catheters and guidewires that incorporated MRI receiver antennae to enhance device visibility. The mean length of the occluded segments was 13.3+/-1.6 cm. The rtMRI-guided CTO recanalization was successful in 11 of 14 swine and in only 1 of 3 swine with the use of x-ray alone. After unsuccessful rtMRI (n=3), x-ray-guided attempts were also unsuccessful. CONCLUSIONS Recanalization of long CTO is entirely feasible with the use of rtMRI guidance. Low-profile clinical-grade devices will be required to translate this experience to humans.
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Affiliation(s)
- Amish N Raval
- Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892-1538, USA
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41
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Baumgartner WA, Burrows S, del Nido PJ, Gardner TJ, Goldberg S, Gorman RC, Letsou GV, Mascette A, Michler RE, Puskas JD, Rose EA, Rosengart TK, Sellke FW, Shumway SJ, Wilke N. Recommendations of the National Heart, Lung, and Blood Institute Working Group on Future Direction in Cardiac Surgery. Circulation 2006; 111:3007-13. [PMID: 15939834 DOI: 10.1161/circulationaha.104.530154] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
New surgical procedures, imaging modalities, and medical devices have improved therapy for many patients and made treatment possible for others who have had few options in the past. In February 2004, the National Heart, Lung, and Blood Institute's (NHLBI) Advisory Council proposed that the institute evaluate the status and future directions in cardiac surgery. In response to this recommendation, the NHLBI convened a working group of cardiac surgeons on May 7 and 8, 2004, to assess the state of cardiac surgery research, identify critical gaps in current knowledge, determine areas of opportunity, and obtain specific recommendations for future research activities. The working group discussed surgical revascularization, novel surgical approaches, valvular research directions, biotechnology and cell-based therapy, heart failure, imaging modalities, and barriers to clinical research and presents its recommendations here.
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Affiliation(s)
- William A Baumgartner
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Md, USA.
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42
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Affiliation(s)
- Zahid Amin
- Joint Division of Pediatric Cardiology, University of Nebraska/Creighton University, Children's Hospital of Omaha, Nebraska, USA.
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43
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Terashima M, Hyon M, de la Pena-Almaguer E, Yang PC, Hu BS, Nayak KS, Pauly JM, McConnell MV. High-resolution real-time spiral MRI for guiding vascular interventions in a rabbit model at 1.5T. J Magn Reson Imaging 2005; 22:687-90. [PMID: 16217745 DOI: 10.1002/jmri.20409] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
PURPOSE To study the feasibility of a combined high spatial and temporal resolution real-time spiral MRI sequence for guiding coronary-sized vascular interventions. MATERIALS AND METHODS Eight New Zealand White rabbits (four normal and four with a surgically-created stenosis in the abdominal aorta) were studied. A real-time interactive spiral MRI sequence combining 1.1 x 1.1 mm(2) in-plane resolution and 189-msec total image acquisition time was used to image all phases of an interventional procedure (i.e., guidewire placement, balloon angioplasty, and stenting) in the rabbit aorta using coronary-sized devices on a 1.5 T MRI system. RESULTS Real-time spiral MRI identified all rabbit aortic stenoses and provided high-temporal-resolution visualization of guide-wires crossing the stenoses in all animals. Angioplasty balloon dilatation and deployment of coronary-sized copper stents in the rabbit aorta were also successfully imaged by real-time spiral MRI. CONCLUSION Combining high spatial and temporal resolution with spiral MRI allows real-time MR-guided vascular intervention using coronary-sized devices in a rabbit model. This is a promising approach for guiding coronary interventions.
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Affiliation(s)
- Masahiro Terashima
- Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, California 94305-5233, USA
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44
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Wacker FK, Hillenbrand CM, Duerk JL, Lewin JS. MR-guided endovascular interventions: device visualization, tracking, navigation, clinical applications, and safety aspects. Magn Reson Imaging Clin N Am 2005; 13:431-9. [PMID: 16084411 DOI: 10.1016/j.mric.2005.04.004] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Reliable visualization and tracking are essential for guiding endovascular devices within blood vessels. The most commonly used methods are susceptibility artifact-based tracking that relies on the artifact created within the image by the device and microcoil- or antenna-based tracking that uses the high signal generated by small MR endovascular receive coils when the transmit coil emits a nonselective radiofrequency pulse. To date, the use of endovascular MR guidance techniques has primarily been confined to animal experiments. There are only a few reports on MR-guided endovascular applications in patients. Therefore, access to the patient within the scanner, dedicated devices, and safety issues remain major challenges. To face these challenges, attention from all radiologists, especially interventional radiologists, is required to make MR-guided endovascular procedures a clinical reality.
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Affiliation(s)
- Frank K Wacker
- Department of Radiology, Klinik und Hochschulambulanz für Radiologie und Nuklearmedizin, Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, Hindenburgdamm 30, 12200 Berlin, Germany.
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45
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Abstract
Magnetic resonance imaging (MRI), which provides superior soft-tissue imaging and no known harmful effects, has the potential as an alternative modality to guide various medical interventions. This review will focus on MR-guided endovascular interventions and present its current state and future outlook. In the first technical part, enabling technologies such as developments in fast imaging, catheter devices, and visualization techniques are examined. This is followed by a clinical survey that includes proof-of-concept procedures in animals and initial experience in human subjects. In preclinical experiments, MRI has already proven to be valuable. For example, MRI has been used to guide and track targeted cell delivery into or around myocardial infarctions, to guide atrial septal puncture, and to guide the connection of portal and systemic venous circulations. Several investigational MR-guided procedures have already been reported in patients, such as MR-guided cardiac catheterization, invasive imaging of peripheral artery atheromata, selective intraarterial MR angiography, and preliminary angioplasty and stent placement. In addition, MR-assisted transjugular intrahepatic portosystemic shunt procedures in patients have been shown in a novel hybrid double-doughnut x-ray/MRI system. Numerous additional investigational human MR-guided endovascular procedures are now underway in several medical centers around the world. There are also significant hurdles: availability of clinical-grade devices, device-related safety issues, challenges to patient monitoring, and acoustic noise during imaging. The potential of endovascular interventional MRI is great because as a single modality, it combines 3-dimensional anatomic imaging, device localization, hemodynamics, tissue composition, and function.
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Affiliation(s)
- Cengizhan Ozturk
- Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA.
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46
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Abstract
MR guidance has been used recently to navigate endovascular catheters and deliver stents in large (aorta and pulmonary) and small (coronary, renal, and femoral) arteries, place ASD closure devices, deliver pulmonary valve stents, guide cardiac RF ablations, and perform intramyocardial injections. However, MR visualization of a stent lumen is still a problem and requires more attention. Because of technical limitations and safety concerns associated with the prototype devices used, limited numbers of clinical studies have been performed. Considerable development is necessary to overcome the challenges and take advantage of the benefits that MR has to offer for endovascular interventions. In this article we review the current state of the art and address the topic partly by referring to our own experiments and presenting our recent illustrations.
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Affiliation(s)
- Christine B Henk
- Department of Radiology, University of California-San Francisco, San Francisco, California 94143-0628, USA
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47
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Raval AN, Telep JD, Guttman MA, Ozturk C, Jones M, Thompson RB, Wright VJ, Schenke WH, DeSilva R, Aviles RJ, Raman VK, Slack MC, Lederman RJ. Real-time magnetic resonance imaging-guided stenting of aortic coarctation with commercially available catheter devices in Swine. Circulation 2005; 112:699-706. [PMID: 16043639 PMCID: PMC1513629 DOI: 10.1161/circulationaha.105.542647] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Real-time MR imaging (rtMRI) is now technically capable of guiding catheter-based cardiovascular interventions. Compared with x-ray, rtMRI offers superior tissue imaging in any orientation without ionizing radiation. Translation to clinical trials has awaited the availability of clinical-grade catheter devices that are both MRI visible and safe. We report a preclinical safety and feasibility study of rtMRI-guided stenting in a porcine model of aortic coarctation using only commercially available catheter devices. METHOD AND RESULTS Coarctation stenting was performed wholly under rtMRI guidance in 13 swine. rtMRI permitted procedure planning, device tracking, and accurate stent deployment. "Active" guidewires, incorporating MRI antennas, improved device visualization compared with unmodified "passive" nitinol guidewires and shortened procedure time (26+/-11 versus 106+/-42 minutes; P=0.008). Follow-up catheterization and necropsy showed accurate stent deployment, durable gradient reduction, and appropriate neointimal formation. MRI immediately identified aortic rupture when oversized devices were tested. CONCLUSIONS This experience demonstrates preclinical safety and feasibility of rtMRI-guided aortic coarctation stenting using commercially available catheter devices. Patients may benefit from rtMRI in the future because of combined device and tissue imaging, freedom from ionizing radiation, and the ability to identify serious complications promptly.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | - Robert J. Lederman
- Correspondence to Robert J. Lederman, MD, Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bldg 10, Room 2c713, MSC 1538, Bethesda, MD 20892–1538. E-mail
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48
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Raman VK, Karmarkar PV, Guttman MA, Dick AJ, Peters DC, Ozturk C, Pessanha BSS, Thompson RB, Raval AN, DeSilva R, Aviles RJ, Atalar E, McVeigh ER, Lederman RJ. Real-time magnetic resonance-guided endovascular repair of experimental abdominal aortic aneurysm in swine. J Am Coll Cardiol 2005; 45:2069-77. [PMID: 15963411 PMCID: PMC1317097 DOI: 10.1016/j.jacc.2005.03.029] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2004] [Revised: 02/20/2005] [Accepted: 03/01/2005] [Indexed: 10/25/2022]
Abstract
OBJECTIVES This study tested the hypotheses that endografts can be visualized and navigated in vivo solely under real-time magnetic resonance imaging (rtMRI) guidance to repair experimental abdominal aortic aneurysms (AAA) in swine, and that MRI can provide immediate assessment of endograft apposition and aneurysm exclusion. BACKGROUND Endovascular repair for AAA is limited by endoleak caused by inflow or outflow malapposition. The ability of rtMRI to image soft tissue and flow may improve on X-ray guidance of this procedure. METHODS Infrarenal AAA was created in swine by balloon overstretch. We used one passive commercial endograft, imaged based on metal-induced MRI artifacts, and several types of homemade active endografts, incorporating MRI receiver coils (antennae). Custom interactive rtMRI features included color coding the catheter-antenna signals individually, simultaneous multislice imaging, and real-time three-dimensional rendering. RESULTS Eleven repairs were performed solely using rtMRI, simultaneously depicting the device and soft-tissue pathology during endograft deployment. Active devices proved most useful. Intraprocedural MRI provided anatomic confirmation of stent strut apposition and functional corroboration of aneurysm exclusion and restoration of laminar flow in successful cases. In two cases, there was clear evidence of contrast accumulation in the aneurysm sac, denoting endoleak. CONCLUSIONS Endovascular AAA repair is feasible under rtMRI guidance. Active endografts facilitate device visualization and complement the soft tissue contrast afforded by MRI for precise positioning and deployment. Magnetic resonance imaging also permits immediate post-procedural anatomic and functional evaluation of successful aneurysm exclusion.
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Affiliation(s)
| | - Parag V. Karmarkar
- From the Cardiovascular Branch and the
- Laboratory of Cardiac Energetics, Division of Intramural Research, National Heart, Lung, and Blood Institute, Bethesda, Maryland; and the
| | - Michael A. Guttman
- Laboratory of Cardiac Energetics, Division of Intramural Research, National Heart, Lung, and Blood Institute, Bethesda, Maryland; and the
| | | | - Dana C. Peters
- Laboratory of Cardiac Energetics, Division of Intramural Research, National Heart, Lung, and Blood Institute, Bethesda, Maryland; and the
| | | | | | - Richard B. Thompson
- Laboratory of Cardiac Energetics, Division of Intramural Research, National Heart, Lung, and Blood Institute, Bethesda, Maryland; and the
| | | | | | | | - Ergin Atalar
- Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, Maryland. Supported by NIH Z01-HL005062-01CVB (to Dr. Lederman). Drs. Raman and Karmarkar contributed equally to this work
| | - Elliot R. McVeigh
- Laboratory of Cardiac Energetics, Division of Intramural Research, National Heart, Lung, and Blood Institute, Bethesda, Maryland; and the
| | - Robert J. Lederman
- From the Cardiovascular Branch and the
- Reprint requests and correspondence: Dr. Robert J. Lederman, Cardiovascular Branch, Clinical Research Program, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Building 10, Room 2c713, Bethesda, Maryland 20892-1538. E-mail:
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Dick AJ, Raman VK, Raval AN, Guttman MA, Thompson RB, Ozturk C, Peters DC, Stine AM, Wright VJ, Schenke WH, Lederman RJ. Invasive human magnetic resonance imaging: feasibility during revascularization in a combined XMR suite. Catheter Cardiovasc Interv 2005; 64:265-74. [PMID: 15736247 PMCID: PMC1317610 DOI: 10.1002/ccd.20302] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
We tested the feasibility and safety of invasive magnetic resonance imaging (MRI) during peripheral angioplasty. Real-time MRI can image soft tissue and may potentially guide therapeutic procedures without ionizing radiation or nephrotoxic contrast. MRI-guided diagnostic catheterization has been described recently, but safe and conspicuous catheter devices are not widely available. An active guidewire, which serves as an MRI receiver antenna, might be useful to guide catheterization or even to image atheroma. We describe a combined interventional suite offering both X-ray fluoroscopy and real-time MRI. We used a 0.030'' active guidewire receiver coil for invasive MRI after X-ray lesion traversal in patients undergoing percutaneous iliofemoral artery revascularization. Intravascular MRI was compared with noninvasive MRI, X-ray angiography, and intravascular ultrasound (IVUS). Seven eligible patients consented to participate, but three were excluded because of lengthy revascularization procedures. Four remaining patients safely underwent combined X-ray fluoroscopy and real-time magnetic resonance imaging (XMR) transport, continuous monitoring, and all imaging modalities. There was no device dislodgment, contamination or evidence of heating. The intravascular MRI coil was well visualized except at the tip, but did not provide superior mural imaging compared with IVUS. Therefore, because an adequate safety and workflow experience was obtained, enrollment was terminated after only four subjects. Invasive MRI is feasible and apparently safe during peripheral angioplasty. Patients can safely be transported and monitored in an XMR interventional suite. An active quarter-wavelength guidewire coil does not provide superior imaging compared with IVUS, but provides satisfactory guidewire visualization. These tools may prove useful for advanced therapeutic procedures in the future.
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Affiliation(s)
- Alexander J. Dick
- Cardiovascular Branch, National Heart, Lung, and Blood Institute, Bethesda, Maryland
| | - Venkatesh K. Raman
- Cardiovascular Branch, National Heart, Lung, and Blood Institute, Bethesda, Maryland
| | - Amish N. Raval
- Cardiovascular Branch, National Heart, Lung, and Blood Institute, Bethesda, Maryland
| | | | - Richard B. Thompson
- Laboratory of Cardiac Energetics, National Heart, Lung, and Blood Institute, Bethesda, Maryland
| | - Cengizhan Ozturk
- Cardiovascular Branch, National Heart, Lung, and Blood Institute, Bethesda, Maryland
| | - Dana C. Peters
- Laboratory of Cardiac Energetics, National Heart, Lung, and Blood Institute, Bethesda, Maryland
| | - Annette M. Stine
- Cardiovascular Branch, National Heart, Lung, and Blood Institute, Bethesda, Maryland
| | - Victor J. Wright
- Cardiovascular Branch, National Heart, Lung, and Blood Institute, Bethesda, Maryland
| | - William H. Schenke
- Cardiovascular Branch, National Heart, Lung, and Blood Institute, Bethesda, Maryland
| | - Robert J. Lederman
- Cardiovascular Branch, National Heart, Lung, and Blood Institute, Bethesda, Maryland
- *Correspondence to: Dr. Robert J. Lederman, Cardiovascular Branch, Division of Intramural Research, National Heart, Lung and Blood Institute, National Institutes of Health, Building 10, Room 2c713, MSC 1538, Bethesda, MD 20892. E-mail:
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Abstract
Although x-ray fluoroscopy (XRF) has guided diagnostic and therapeutic transcatheter procedures for decades, certain limitations still exist. XRF still visualizes tissue poorly and relies on projection of shadows that do not convey depth information. Adjunctive echocardiography overcomes some of these limitations but still suffers suboptimal or unreliable imaging windows. Furthermore, ionizing radiation exposure in children imparts a cancer risk. An interventional platform using real-time magnetic resonance imaging (MRI) may offer superior image guidance without radiation. Although there are many remaining challenges, but real-time MRI has the potential to revolutionize transcatheter therapeutics.
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Affiliation(s)
- A N Raval
- Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Building 10, Room 2c713, MSC 1538, Bethesda, MD 20892-1538, USA
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