Posted by: Johnson Francis on: 12 Mar, 2010
Blood-oxygen-level dependent (BOLD) magnetic resonance imaging (MRI) is technique useful in detecting myocardial ischemia. Oxyhaemoglobin and deoxyhaemoglobin differ in their magnetic properties – the former in diamagnetic while the latter is paramagnetic. This difference in magnetic properties can be used as an endogenous contrast to visualize tissue oxygenation. This technique has been termed BOLD MRI. [...]
Posted by: Johnson Francis on: 25 Sep, 2009
Dark blood imaging and bright blood imaging are terminologies usually used in: a. Cardiac magnetic resonance imaging b. Echocardiography c. Coronary angiography d. Multi slice CT Answer: a Dark blood imaging and bright blood imaging are terminologies usually used in cardiac magnetic resonance imaging. Generally, in spin echo imaging flowing blood appears dark and in [...]
Posted by: Johnson Francis on: 16 Jul, 2009
Advantages of MRI in congenital heart disease imaging No ionizing radiation 3D anatomy can be visualised Blood flow analysis is possible - black blood and white blood imaging > flowing blood is seen as white in white blood imaging. Indications for cardiac magnetic resonance (CMR) imaging in CHD Repaired tetralogy of Fallot – Right ventricular outflow tract aneurysm has to [...]
Posted by: Johnson Francis on: 07 May, 2009
Coronary stents can get heated up during magnetic resonance imaging (MRI). Hence MRI is better avoided within the first month after bare metal stent and three months of drug eluting stent implantation. This is the usual time period for endothelisation of these stents.
Posted by: Johnson Francis on: 13 Apr, 2009
Most accurate and reproducible technique for imaging the heart Outstanding image resolution and intrinsic tissue contrast Safe, non-invasive and does not expose the subject to ionizing radiation White blood and dark blood imaging in CMR: For functional imaging white blood imaging is used while dark blood imaging is used for morphological evaluation. Delayed enhancement with [...]
