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Result : Searchterm 'cardiac' found in 11 terms [] and 75 definitions []
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Cardiac MRIForum -
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In the last years, cardiac MRI techniques have progressively improved. No other noninvasive imaging modality provides the same degree of contrast and temporal resolution for the assessment of cardiovascular anatomy and pathology. Contraindications MRI are the same as for other magnetic resonance techniques.
The primary advantage of MRI is extremely high contrast resolution between different tissue types, including blood. Moreover, MRI is a true 3 dimensional imaging modality and images can be obtained in any oblique plane along the true cardiac axes while preserving high temporal and spatial resolution with precise demonstration of cardiac anatomy without the administration of contrast media.
Due to these properties, MRI can precisely characterize cardiac function and quantify cavity volumes, ejection fraction, and left ventricular mass. In addition, cardiac MRI has the ability to quantify flow (see flow quantification), including bulk flow in vessels, pressure gradients across stenosis, regurgitant fractions and shunt fractions. Valve morphology and area can be determined and the severity of stenosis quantified. In certain disease states, such as myocardial infarction, the contrast resolution of MRI is further improved by the addition of extrinsic contrast agents (see myocardial late enhancement).
A dedicated cardiac coil, and a field strength higher than 1 Tesla is recommended to have sufficient signal. Cardiac MRI acquires ECG gating. Cardiac gating (ECGs) obtained within the MRI scanner, can be degraded by the superimposed electrical potential of flowing blood in the magnetic field. Therefore, excellent contact between the skin and ECG leads is necessary. For male patients, the skin at the lead sites can be shaved. A good cooperation of the patient is necessary because breath holding at the end of expiration is practiced during the most sequences.
See also Displacement Encoding with Stimulated Echoes.
For Ultrasound Imaging (USI) see Cardiac Ultrasound at US-TIP.com.

See also the related poll results: 'In 2010 your scanner will probably work with a field strength of' and 'MRI will have replaced 50% of x-ray exams by'
 
Images, Movies, Sliders:
 Infarct 4 Chamber Cine  Open this link in a new window
    

Courtesy of  Robert R. Edelman
 MVP Parasternal  Open this link in a new window
    

Courtesy of  Robert R. Edelman
 Delayed Myocardial Contrast Enhancement from Infarct  Open this link in a new window
      

Courtesy of  Robert R. Edelman
 
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• Related Searches:
    • Cardiovascular Imaging
    • Heart MRI
    • Cardiac Axes
    • Cardiac Gating
    • Cardiac Risks
 
Further Reading:
  Basics:
Cardiac MRI - Technical Aspects Primer
Wednesday, 7 August 2002
Prediction of Myocardial Viability by MRI
1999   by circ.ahajournals.org    
  News & More:
Validation of Thermometric Cardiac Imaging by MRI
Thursday, 26 January 2017   by www.satprnews.com    
Controlling patient's breathing makes cardiac MRI more accurate
Friday, 13 May 2016   by www.upi.com    
New technique could allow for safer, more accurate heart scans
Thursday, 10 December 2015   by www.gizmag.com    
Precise visualization of myocardial injury: World's first patient-based cardiac MRI study using 7T MRI
Wednesday, 10 February 2016   by medicalxpress.com    
Susceptibility-weighted cardiovascular magnetic resonance in comparison to T2 and T2 star imaging for detection of intramyocardial hemorrhage following acute myocardial infarction at 3 Tesla
Tuesday, 28 October 2014   by 7thspace.com    
MRI Resources 
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Cardiac Axes
 
The cardiac anatomy is complex, and cardiac structures have different appearances depending on the imaging plane. The most useful imaging planes are those parallel and perpendicular to the cardiac axes. The short axis (SA), vertical long cardiac axis (VLA - 2 chamber view - 2C) and horizontal long axis (HLA - 4 chamber view - 4C) are the standard views in cardiovascular imaging. The orientation of a heart is described relative to an imaginary line drawn from the base of the heart (valve plane) to the apex.
Obtaining cine images in these double-oblique planes requires the use of multiple localizing MRI sequences and knowledge of the cardiac anatomy. The long axis image plane is determined by the line that runs from the apex of the heart to a midpoint at the base of the heart, often taken to be midway between the mitral valve leaflets. The short axis is planned perpendicular to the long axis view.

 
Images, Movies, Sliders:
 Angulation of Cardiac Planes Cine Images of Septal Infarct  Open this link in a new window
      

Courtesy of  Robert R. Edelman

 Cardiac Infarct 4 Chamber Cine 1  Open this link in a new window
 Cardiac Infarct Short Axis Cine bFFE 1  Open this link in a new window
 
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• View the DATABASE results for 'Cardiac Axes' (7).Open this link in a new window

 
Further Reading:
  Basics:
A Guide To Cardiac Imaging
   by www.simplyphysics.com    
  News & More:
Healthy Heart Anatomy
   by www.columbiasurgery.org    
MRI Resources 
Health - Movies - Guidance - Musculoskeletal and Joint MRI - Distributors - Resources
 
Cardiac Phase
 
A particular point in the cardiac cycle.

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Further Reading:
  Basics:
A Guide To Cardiac Imaging
   by www.simplyphysics.com    
Searchterm 'cardiac' was also found in the following services: 
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News  (79)  Resources  (27)  Forum  (12)  
 
Cardiac RisksMRI Resource Directory:
 - Safety -
 
During the MRI scan an augmentation of T waves is observed at fields used in standard imaging but this possible MRI side effect is completely reversible upon removal from the magnet. A field strength dependent increase in the amplitude of the ECG in rats has been observed during exposure to high homogeneous stationary magnetic fields, but this side effect is not transferable to standard imaging situations for humans.


MRI Safety Guidance
The minimum level at which augmentation can be observed is 0.3 T and increases by higher field strength. An augmentation in T-wave amplitude can occur instantaneously and is immediately reversible after exposure to the magnetic field ceased. There should be no abnormalities in the ECG in the later follow-up. Augmentation of the signal amplitude in the T-wave segment may result from superimposed electrical potential. No circulatory alterations coincide with the ECG changes. Therefore, no biological risks are believed to be associated with them.
For more MRI safety information see also Contraindications and MRI Risks.

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• View the DATABASE results for 'Cardiac Risks' (2).Open this link in a new window

 
Further Reading:
  Basics:
A Primer on Medical Device Interactions with Magnetic Resonance Imaging Systems
   by govpulse.us    
MRI Resources 
Blood Flow Imaging - Examinations - Process Analysis - Coils - MRCP - Functional MRI
 
Cardiac StentForum -
related threadsMRI Resource Directory:
 - Safety -
 
The MRI safety of cardiac stents is dependent of the material, the examined part of the body and the used field strength. A susceptibility artifact is expected also in low magnetic fields, but less.


MRI Safety Guidance
Most of the used materials are non-magnetic, for this case there is no risk for movement caused through the magnetic field. If the cardiac stent is outside the region of the radio frequency pulse, also the risk of e.g. heating is low.

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• View the DATABASE results for 'Cardiac Stent' (4).Open this link in a new window

 
Further Reading:
  News & More:
Medtronic Receives FDA Approval for Endeavor® Zotarolimus-Eluting Coronary Stent System
Friday, 1 February 2008   by wwwp.medtronic.com    
MRI Resources 
Journals - Spectroscopy pool - Spectroscopy - Claustrophobia - General - Intraoperative MRI
 
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