Impact of imaging landmark on the risk of MRI-related heating near implanted medical devices like cardiac pacemaker leads.

06:00 EDT 1st September 2010 | BioPortfolio

Summary of "Impact of imaging landmark on the risk of MRI-related heating near implanted medical devices like cardiac pacemaker leads."

Implanted medical devices such as cardiac pacemakers pose a potential hazard in magnetic resonance imaging. Electromagnetic fields have been shown to cause severe radio frequency-induced tissue heating in some cases. Imaging exclusion zones have been proposed as an instrument to reduce patient risk. The purpose of this study was to further assess the impact of the imaging landmark on the risk for unintended implant heating by measuring the radio frequency-induced electric fields in a body phantom under several imaging conditions at 1.5T. The results show that global radio frequency-induced coupling is highest with the torso centered along the superior-inferior direction of the transmit coil. The induced E-fields inside the body shift when changing body positioning, reducing both global and local radio frequency coupling if body and/or conductive implant are moved out from the transmit coil center along the z-direction. Adequate selection of magnetic resonance imaging landmark can significantly reduce potential hazards in patients with implanted medical devices. Magn Reson Med, 2010. (c) 2010 Wiley-Liss, Inc.


Department of Internal Medicine I, University Hospital Würzburg, Julius-Maximilians-University, Würzburg, Germany.

Journal Details

This article was published in the following journal.

Name: Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonan
ISSN: 1522-2594


PubMed Articles [35196 Associated PubMed Articles listed on BioPortfolio]

Diffusion Tensor Magnetic Resonance Imaging of Trigeminal Nerves in Relapsing Herpetic Keratouveitis.

Corneal hypoesthesia is the landmark of HSV and VZV keratitis and can lead to neurotrophic keratitis. Diffusion tensor imaging (DTI) is a new magnetic resonance imaging (MRI) derived technique, which ...

Imaging Vascular Disease and Amyloid in the Aging Brain: Implications for Treatment.

Vascular risk factors (e.g. hypertension, dyslipidemia and diabetes) are well known risk factors for Alzheimer' disease. These vascular risk factors lead to vascular brain injuries, which also increas...

Climate Impacts on Extreme Energy Consumption of Different Types of Buildings.

Exploring changes of building energy consumption and its relationships with climate can provide basis for energy-saving and carbon emission reduction. Heating and cooling energy consumption of differe...

A Novel Brain Stimulation Technology Provides Compatibility with MRI.

Clinical electrical stimulation systems - such as pacemakers and deep brain stimulators (DBS) - are an increasingly common therapeutic option to treat a large range of medical conditions. Despite thei...

Impact of Pacemaker Lead Characteristics on Pacemaker Related Infection and Heart Perforation: A Nationwide Population-Based Cohort Study.

Several risk factors for pacemaker (PM) related complications have been reported. However, no study has investigated the impact of lead characteristics on pacemaker-related complications.

Clinical Trials [7106 Associated Clinical Trials listed on BioPortfolio]

St. Mary's Duluth Clinic (SMDC) Pacemaker Magnetic Resonance Imaging (MRI) Study

The purpose of this study is to monitor and follow non-pacemaker dependent patients with implanted permanent pacemakers, who undergo medically required MRI scans. Patients with pacemakers...

University Hospital Cardiac Device MR Registry: The Safety of MR Imaging in Patients With Implanted Cardiac Devices

A single-center registry to prospectively evaluate the safety of non-cardiac/non-thoracic magnetic resonance imaging (MRI) in patients with implanted cardiac devices (pacemakers and implan...

Prospective Clinical Analysis of Ultrasound-guided Biceps Corticosteroid Injections

Using randomization, prospectively determine superiority of either ultrasound-guided or landmark-guided biceps corticosteroid injections with regard to various clinical variables.

Heating Precondition of Streamlined Liner of the Pharynx Airway Decrease the Incidence of Sore Throat

The effect of heating precondition of streamlined liner of the pharynx airway (SLIPA) on respiratory mechanics and sore throat was investigated.

The Study of the Impact of Disclosing Imaging Study Information to Trial Participants

The overall goal of the study is to evaluate how research participants in Parkinson Disease studies that include brain imaging with a dopamine transporter ligand choose to receive the imag...

Medical and Biotech [MESH] Definitions

The use of molecularly targeted imaging probes to localize and/or monitor biochemical and cellular processes via various imaging modalities that include RADIONUCLIDE IMAGING; ULTRASONOGRAPHY; MAGNETIC RESONANCE IMAGING; fluorescence imaging; and MICROSCOPY.

Any system which allows payors to share some of the financial risk associated with a particular patient population with providers. Providers agree to adhere to fixed fee schedules in exchange for an increase in their payor base and a chance to benefit from cost containment measures. Common risk-sharing methods are prospective payment schedules (PROSPECTIVE PAYMENT SYSTEM), capitation (CAPITATION FEES), diagnosis-related fees (DIAGNOSIS-RELATED GROUPS), and pre-negotiated fees.

Removal of tissue by vaporization, abrasion, or destruction. Methods used include heating tissue by hot liquids or microwave thermal heating, freezing (CRYOABLATION), chemical ablation, and photoablation with LASERS.

Electric conductors through which an electric current enters or leaves a medium. When inserted, usually surgically, they are referred to as implanted electrodes.

Reduction of high-risk choices and adoption of low-risk quantity and frequency alternatives.


Relevant Topic

Radiology is the branch of medicine that studies imaging of the body; X-ray (basic, angiography, barium swallows), ultrasound, MRI, CT and PET. These imaging techniques can be used to diagnose, but also to treat a range of conditions, by allowing visuali...

Searches Linking to this Article