High resolution high density CMR circular tagging
نویسندگان
چکیده
Background Wall thickening is the dominant factor for the effective ejection of the left ventricle (LV). Circular tagging is the suitable pattern for studying the radial strain which quantifies the wall thickening. High density tagging facilitates the post processing required for this quantification [1]. Following the recent sequence development for circular tagging, in this work we propose a k-spaced based approach for increasing the resolution and density of the circular tags during the reconstruction.
منابع مشابه
Polar HARP for the polar CMR tagging
Background The polar coordinate system adapts best to the morphology of the heart. The recently developed sequences that allow the CMR Tagging in the circular and radial directions facilitate the calculation and presentation of the myocardium mechanics. Development of the corresponding processing methods is required to further enhance the utilization of these sequences. Here we suggest a proces...
متن کاملHigh-resolution quantitative spiral perfusion for microvascular coronary dysfunction detection
Background Quantitative first-pass CMR can assess the severity of microvascular coronary dysfunction(MCD) in subjects with signs and symptoms of ischemia but without obstructive coronary artery disease(CAD). In patients with MCD, abnormalities of myocardial perfusion reserve (MPR) occur globally but may also vary in their transmural extent. Thus, high spatial resolution quantitative CMR perfusi...
متن کاملAdenosine stress CMR with variable density spiral pulse sequences accurately detects CAD with minimal dark-rim artifacts
Background Adenosine stress CMR perfusion imaging has numerous advantages over competing modalities for assessing CAD demonstrating high diagnostic and prognostic utility. However, adenosine stress CMR perfusion imaging is limited by motion-induced dark-rim artifacts (DRA) which may be mistaken for true perfusion abnormalities. We have previously demonstrated that a high-resolution variable-den...
متن کاملComparison and reproducibility of standard and high temporal resolution myocardial tissue tagging in patients with severe aortic stenosis
Background Myocardial tissue tagging with cardiac magnetic resonance (CMR) can be used to quantify strain and SR, however, there are little data on the reproducibility. Diastolic SR may be of particular interest as it may be the most sensitive marker of diastolic dysfunction often occurring early in the course of disease. Methods Eight patients with isolated severe AS without obstructive corona...
متن کاملCMR tagging in the polar coordinate system
Introduction Strain of the myocardium is conventionally presented in the polar coordinate system since it adapts best to the morphology of the heart. Strain calculation would be facilitated considerably if the CMR tagging patterns were in the radial or circumferential direction. However, the CMR tagging is implemented mostly in the Cartesian coordinate system as it is prescribed by SPAMM techni...
متن کامل