A new method of measuring long spin-lattice relaxation times (T1) is proposed. Being a single scan technique, the method is at least one order of magnitude faster than the conventional technique. This method (Single-Scan or Slice Selected Inversion Recovery or SSIR) relies on the slice selection technique. The method is experimentally verified and compared with the time taken by the conventiona...

This paper proposes a bit error recovery method for Extended 2 Dimensional MMR coded bitstreams. When an error occurs in an MMR coded bitstream, the bitstream cannot be decoded correctly after the error point. To prevent losing valid information after an error, we developed an error recovery system that detects bit errors and applies bit-inversion to correct the errors. In case the bit-inversio...

Background Edema-sensitive T2-weighted cardiac magnetic resonance (CMR) based on fast spin-echo (FSE) imaging is a useful modality to detect acute myocardial injury. Conventional T2-weighted CMR uses three inversion-recovery (IR) pulses, the first two to null the blood signal, and the last one (STIR) to null fat signal, but suffers from reduced myocardial signal and signal dropout. We compared ...

Background The dual inversion recovery (dual IR) pulse sequence has recently been shown to improve blood suppression and infarct delineation in late gadolinium enhancement (LGE) images of myocardial infarction. This resulted in significantly lower inter-observer variability in manual outlining of scar and higher expert confidence in scar detection and transmurality when compared with convention...

Introduction: Multiple sclerosis affects both white matter (WM) and gray matter (GM). Conventional MR imaging is widely used to assess T2 hyperintense lesions in WM. These techniques are suboptimal in detecting cortical lesions. Recently, double inversion recovery (DIR) and phase sensitive inversion recovery (PSIR) have been shown to increase the confidence with which cortical lesions can be vi...

Sequential 12 lead electrocardiograms were recorded during angina pectoris induced by ergonovine maleate in 38 patients with variant angina. Transient U wave inversion was observed in 17 patients with ST segment elevation in anterior chest leads, but in only three of 21 patients with ST segment elevation in the inferior leads associated with right coronary artery spasm. In the 17, all of whom h...

Inversion recovery sequences that vary the inversion time (t(i)) have been employed to determine T(1) and, more recently, quantitative magnetization transfer parameters. Specifically, in previous work, the inversion recovery pulse sequences varied t(i) only while maintaining a constant delay (t(d)) between repetitions. T(1) values were determined by fitting to a single exponential function, and...

Introduction: Inversion recovery (IR) TrueFISP imaging sequences have recently been used to acquire dynamic contrast enhanced (DCE) MRI data due to their short acquisition time, sensitivity to changes in tissue longitudinal relaxation times and superior signal-to-noise characteristics [1]. Use of an inversion recovery preparation offers the ability to quantify relaxation time changes at each dy...