Effects of supplemental oxygen on cardiovascular magnetic resonance water proton relaxation time constant measurements (T1, T2 and T2*)

2019 ◽  
Vol 61 ◽  
pp. 124-130 ◽  
Author(s):  
James W. Goldfarb ◽  
Brittany Hsu ◽  
Jie J. Cao
Keyword(s):  
Cardiovascular Magnetic Resonance ◽  
Relaxation Time ◽  
Magnetic Resonance ◽  
Time Constant ◽  
Supplemental Oxygen ◽  
Water Proton ◽  
Proton Relaxation ◽  
Relaxation Time Constant ◽  
Proton Relaxation Time

Effects of cytoskeletal inhibitors on water proton relaxation time changes in unfertilized and fertilized sea urchin eggs

1987 ◽  
Vol 11 (8) ◽  
pp. 605-614 ◽  
Author(s):  
S ZIMMERMAN ◽  
A ZIMMERMAN ◽  
I CAMERON ◽  
G FULLERTON ◽  
H SCHATTEN ◽  
...  
Keyword(s):  
Relaxation Time ◽  
Sea Urchin ◽  
Water Proton ◽  
Proton Relaxation ◽  
Proton Relaxation Time ◽  
Sea Urchin Eggs ◽  
Time Changes

Change in water proton relaxation time during erythrocyte maturation

1983 ◽  
Vol 116 (3) ◽  
pp. 409-414 ◽  
Author(s):  
I. L. Cameron ◽  
H. C. Dung ◽  
K. E. Hunter ◽  
C. F. Hazlewood
Keyword(s):  
Relaxation Time ◽  
Water Proton ◽  
Proton Relaxation ◽  
Proton Relaxation Time

Sequential changes in MR water proton relaxation time detect the process of rat brain myelination during maturation

2001 ◽  
Vol 122 (12) ◽  
pp. 1281-1291 ◽  
Author(s):  
Mitsunori Matsumae ◽  
Daisaku Kurita ◽  
Hideki Atsumi ◽  
Munetaka Haida ◽  
Osamu Sato ◽  
...  
Keyword(s):  
Relaxation Time ◽  
Rat Brain ◽  
Water Proton ◽  
Proton Relaxation ◽  
Proton Relaxation Time

Assembly of USPIO/MOF nanoparticles with high proton relaxation rates for ultrasensitive magnetic resonance sensing

2021 ◽  
Author(s):  
Zhou Xu ◽  
Yanqiu Chen ◽  
Mao-Long Chen ◽  
Wei Chen ◽  
Yunhui Cheng
Keyword(s):  
Relaxation Time ◽  
Magnetic Resonance ◽  
Proton Relaxation ◽  
Relaxation Rates ◽  
Proton Relaxation Time ◽  
High Proton

Transverse proton relaxation time (T2)-mediated magnetic resonance sensing (MRS) with simple pretreatment have drawn increasing attention for the development of biosensors, whereas conventional MRS is not competent for detecting trace...

scholarly journals Conformations of 3-Deazaadenosine, 3-Deaza-8-azaadenosine, and Benzimidazole-1-β-ᴅ-riboside in Solution: HRNMR-, Proton-Relaxation-Time-, and Nuclear-Overhauser- Effect Studies

1978 ◽  
Vol 33 (5-6) ◽  
pp. 305-316 ◽  
Author(s):  
H.-D. Lüdemann ◽  
H. Pladi ◽  
E. Westhof ◽  
L. B. Townsend
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Relaxation Time ◽  
Magnetic Resonance ◽  
Nuclear Overhauser Effect ◽  
Proton Relaxation ◽  
Proton Relaxation Time ◽  
Nuclear Overhauser Enhancement ◽  
Overhauser Effect ◽  
Nuclear Overhauser ◽  
Ribose Moiety

The solution conformations of 3-deazaadenosine, 3-deaza-8-azaadenosine, and benzimidazole-1-β- ᴅ-riboside have been determined by nuclear magnetic resonance methods in aqueous and ammonia solutions. The two-state S ⇄ N model of Altona and Sundaralingam is used to analyse the ribose moiety. In order to characterize the orientation of the base relative to the ribose, longitudinal proton relaxation time and nuclear Overhauser enhancement measurements have been carried out. It is shown that 3-deazaadenosine and benzimidazole-1-β-ᴅ-riboside exist preferentially in the S- syn-g+/t (70%) and the N-anti-g+/t (30%) conformation families. In the case of 3-deaza-8-aza- adenosine, some destabilization of the g+rotamer occurs. In this case, the pulsed methods seem to indicate a preference of the base for the anti range.

Regarding the Néel relaxation time constant in magnetorelaxometry

2014 ◽  
Vol 116 (16) ◽  
pp. 163914 ◽  
Author(s):  
J. Leliaert ◽  
A. Coene ◽  
G. Crevecoeur ◽  
A. Vansteenkiste ◽  
D. Eberbeck ◽  
...  
Keyword(s):  
Relaxation Time ◽  
Time Constant ◽  
Relaxation Time Constant ◽  
Néel Relaxation

The Effects of the Method of Death and Lapsed Time on Proton Relaxation Time T1 in Autopsied Muscle Samples

1993 ◽  
Vol 28 (6) ◽  
pp. 529-532 ◽  
Author(s):  
ANU M. ALANEN ◽  
RIITA K. PARKKOLA ◽  
IRIS G.V. LILLSUNDE ◽  
KIMMO O.J. VIRTANEN ◽  
HANNU O. KALIMO ◽  
...  
Keyword(s):  
Relaxation Time ◽  
Proton Relaxation ◽  
Proton Relaxation Time

scholarly journals Calculation of Left Ventricular Relaxation Time Constant-Tau in Patients With Aortic Regurgitation by Continuous-Wave Doppler

2008 ◽  
Vol 2 (1) ◽  
pp. 28-30 ◽  
Author(s):  
Bai Xufang
Keyword(s):  
Relaxation Time ◽  
Aortic Regurgitation ◽  
Time Constant ◽  
Continuous Wave ◽  
Left Ventricular ◽  
Simple Method ◽  
Relaxation Time Constant ◽  
Left Ventricular Relaxation ◽  
Ventricular Relaxation ◽  
Continuous Wave Doppler

Left ventricular relaxation time constant, Tau, is the best index to evaluate left ventricular diastolic function. The measurement is only available traditionally in catheter lab. In Echo lab, several methods of non-invasive measurement of Tau have been tried since 1992, however almost all the methods are still utilizing the same formula to calculate Tau as in catheter lab, which makes them inconvenient, time-consuming and sometimes not very accurate. A simple method to calculate Tau in patients with mitral regurgitation has been developed just based on Weiss’ formula and simplified Bernoulli’s equation. Similarly, formulas are developed here by pure mathematical derivative to calculate Tau by continuous-wave Doppler in patients with aortic regurgitation.

scholarly journals Calculation of Left Ventricular Relaxation Time Constant-Tau in Humans by Continuous-Wave Doppler

2008 ◽  
Vol 2 (1) ◽  
pp. 9-11 ◽  
Author(s):  
Xufang Bai
Keyword(s):  
Relaxation Time ◽  
Time Constant ◽  
Continuous Wave ◽  
Left Ventricular Diastolic Function ◽  
Left Ventricular ◽  
Simple Method ◽  
Relaxation Time Constant ◽  
Left Ventricular Relaxation ◽  
Ventricular Relaxation ◽  
Continuous Wave Doppler

Left ventricular relaxation time constant, Tau, is the best index to evaluate left ventricular diastolic function, but the measurement is only available traditionally in catheter lab. In Echo lab, several methods of non-invasive measurement of Tau have been tried since 1992, however almost all the methods are still utilizing the same formula to calculate Tau as in catheter lab, which makes them inconvenient, time-consuming and sometimes not very accurate. Based on Weiss’ formula and simplified Bernoulli’s equation, a simple method is developed by pure mathematical derivative to calculate Tau by continuous-wave Doppler in patients with mitral regurgitation.

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