Saturday, October 31, 2009

Myocardial MR Perfusion - Pattern Recognition













Keywords: Myocardial Perfusion, Artifacts, Perfusion Defects.


Friday, October 30, 2009

Pressure Gradient Measurement in CMR





Source:
Tanaka et al. Correlation of Aortic Valve Area Obtained by the Velocity-Encoded Phase Contrast Continuity Method to Direct Planimetry using Cardiovascular Magnetic Resonance. J. of Cardiovascular Magnetic Resonance (2007) vol. 9 (5) pp. 799-805

Keywords: Continuity Equation, Modified Bernoulli Equation, Peak Velocity, CMR

CMR Imaging of Aortic Valve









Keywords: Continuity Equation, Modified Bernoulli Equation, Peak Velocity, CMR

Thursday, October 29, 2009

Flow Measurement in Main Pulmonary Artery





Read here for alternate way of planning for RVOT.








Keywords: Free Breathing, Long Term Averaging, Retrospective Gating

Friday, October 23, 2009

T2* Measurement of Myocardial Iron in Thalassemia (Part I)












If you need further details on getting the exponential trendline, feel free to let me know.



References:
Leung et al. Magnetic resonance imaging assessment of cardiac and liver iron load in transfusion dependent patients. Pediatr. Blood Cancer (2009) vol. 53 (6) pp. 1054-1059

Westwood et al. Intercentre Reproducibility of Magnetic Resonance T2* Measurements of Myocardial Iron in Thalassaemia. The international journal of cardiovascular imaging (2005) vol. 21 (5) pp. 531-538

Westwood et al. A single breath-hold multiecho T2* cardiovascular magnetic resonance technique for diagnosis of myocardial iron overload. J. Magn. Reson. Imaging (2003) vol. 18 (1) pp. 33-9

Westwood et al. Interscanner reproducibility of cardiovascular magnetic resonance T2* measurements of tissue iron in thalassemia. J. Magn. Reson. Imaging (2003) vol. 18 (5) pp. 616-620

Anderson. Cardiovascular T2-star (T2*) magnetic resonance for the early diagnosis of myocardial iron overload. European Heart Journal (2001) vol. 22 (23) pp. 2171-2179

MRI Safety Alerts



Thursday, October 22, 2009

Contrast-enhanced FLAIR for Infectious Leptomeningitis










If you're interested in knowing more about the T1 contrast characteristics of the long-TE FLAIR, leave me a note and I'll try to explain.


Reference:
Parmar et al. Contrast-enhanced flair imaging in the evaluation of infectious leptomeningeal diseases. European journal of radiology (2006) vol. 58 (1) pp. 89-95

Wednesday, October 21, 2009

Navigator-gated T2W Abdomen





Reference:
Klessen et al. Magnetic resonance imaging of the upper abdomen using a free-breathing T2-weighted turbo spin echo sequence with navigator triggered prospective acquisition correction. J. Magn. Reson. Imaging (2005) vol. 21 (5) pp. 576-82


Tuesday, October 20, 2009

Monday, October 19, 2009

Sunday, October 18, 2009

Saturday, October 17, 2009

Detailed CMR Anatomy

Transverse Views




Legends




Coronal Views


Sagittal Views


Short Axis Views


Horizontal Long Axis Views




Vertical Long Axis Views


Left Ventricular Outflow Tract Views


Right Ventricular Outflow Tract Views



Source:

Bogaert J, Dymarkowski S, Tayor AM. Cardiac Anatomy. In: Clinical Cardiac MRI. Springer: Berlin Heidelberg, 2005; 61-83.


Thursday, October 15, 2009

Phase Sensitive Inversion Recovery











Keywords: Phase sensitive image reconstruction, IR TurboFLASH, 2D Single-shot IR TrueFISP, 3D navigator-gated IR TurboFLASH


Tuesday, October 13, 2009

Brain MRI - Neonates








Keywords: Neonates, Brain, Gray Matter, White Matter

Source:
Jones RA., Palasis S., Grattan-Smith JD. MRI of the Neonatal Brain: Optimization of Spin-Echo Parameters. AJR 2004:182 367-372