Magnetic resonance in medicine.
Publisher:
Academic Press,. New York, NY : Wiley (1999)
Frequency: Twelve no. a year, 1987-
Country: United States
Language: English
Author(s):
Society of Magnetic Resonance in Medicine (U.S.), International Society for Magnetic Resonance in Medicine.
Start Year:1984 -
ISSN:
0740-3194 (Print)
1522-2594 (Electronic)
0740-3194 (Linking)
1522-2594 (Electronic)
0740-3194 (Linking)
Impact Factor
3.3
2022
| NLM ID: | 8505245 |
| (DNLM): | J27975000(s) |
| (OCoLC): | 09922011 |
| Coden: | MRMEEN |
| LCCN: | 88640361 |
| Classification: | W1 MA34IF |
Analysis of magnetization transfer (MT) influence on quantitative mapping of T2 relaxation time. Multi-echo spin-echo (MESE) protocol is the most effective tool for mapping T relaxation in vivo. Still, MESE extensive use of radiofrequency pulses causes magnetization transfer (MT)-related bias of the water signal, instigated by the presence of macromolecules (MMP). Here, we analyze the effects of MT on MESE signal, alongside their impact on quantitative T measurements. Study used 3 models: in vitro urea phantom, ex vivo horse brain, and in vivo human brain. MT ratio (MTR) was measured between single-SE and MESE protocols under different scan settings including varying echo train lengths, n...
Theoretical MRI contrast model for exogenous T2 agents. The rational development of new generations of MRI contrast agents (CAs) requires a scheme for predicting contrast enhancement. Previous contrast predictions have been based largely on empirical results in specific systems. Here we present a general theoretical model for evaluating the minimum concentration of T2 CA required for satisfactory image contrast. This analytic contrast model is applicable to a wide range of T2-type agents and delivery scenarios, and requires only a few readily evaluated parameters. We demonstrated the model by predicting contrast produced by superparamagnetic ferumo...