CPMG echo amplitudes with arbitrary refocusing angle: Explicit expressions, asymptotic behavior, approximations

Accelerated and motion‐robust in vivo T2 mapping from radially undersampled data using bloch‐simulation‐based iterative reconstruction

“…These lead to significant errors, ranging up to as much as 50% to 100% of the true T 2 values when signal decay curves are fitted to a simple exponential . More accurate predictions can be obtained by using customized acquisition schemes and tailored analytical signal models or using algorithms that take into account the various factors that affect the spin dynamics in MSE sequences . In order to be compatible with the minimization of Eq.…”

Complex B1+ mapping with Carr‐Purcell spin echoes and its application to electrical properties tomography

“…In fact, this flip angle–dependent oscillatory behavior for multi‐spin‐echo sequences, such as the ones suggested by Carr and Purcell (CP) 13 or Meiboom and Gill (CPMG), 14 has already been demonstrated. 15 , 16 , 17 …”

Multiphase Flow Regime Characterization and Liquid Flow Measurement Using Low-Field Magnetic Resonance Imaging

“…The T 2,eff used for correction was determined as the effective T 2 decay obtained from a static LFA-CPMG experiment performed prior to each flow experiment. The use of an exponential convective decay model is based on the work by Petrova et al [ 34 ] that showed the asymptotic form of the T 2,eff -corrected signal in low flip angle CPMGs to be exponential. The exponential fit was validated to be a better fit to our data than the linear fit method that is applied in flow measurement using bulk CPMGs.…”

“…This flow map was presented as Figure 4 in Section 2. Flow experiments were performed using broadband excitation constant-gradient LFA-CPMG pulse sequences [33,34] using 45 • flip angle pulses of duration t pulse = 10 µs, and 2τ = 800 µs echo spacing. This pulse sequence is shown schematically in Figure 10.…”