Warning: Undefined array key "mm" in /www/wwwroot/www.ai-bt.com/si.php on line 10 Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /www/wwwroot/www.ai-bt.com/si.php on line 10 Quantifying venous flow dynamics by flow-dephased and flow-rephased functional magnetic resonance imaging.

Literature DB >> 16320093

Quantifying venous flow dynamics by flow-dephased and flow-rephased functional magnetic resonance imaging.

Abstract

By combining flow-dephased and flow-rephased diffusion weighting with blood oxygenation level dependent functional magnetic resonance imaging, it is possible to study flow dynamics in the venous network of the human brain. Thereby, ballistic flow, which conserves direction and velocity during echo time, is separated from diffusive flow with many changes in direction and velocity. By using this technique with very low diffusion/flow weighting, the mean velocity of ballistic flow was quantified in this study. The result of 10.9+/-3.2 cm/s strongly indicates that large venous vessels are the source of ballistic flow.

Entities: Species

Mesh：

Year: 2005 PMID： 16320093 DOI： 10.1007/s10334-005-0011-1

Source DB: PubMed Journal: MAGMA ISSN： 0968-5243 Impact factor: 2.310

11 in total

1. Transcranial color-coded duplex sonography of intracranial veins and sinuses in adults. Reference data from 130 volunteers.

Authors: E Stolz; M Kaps; A Kern; S S Babacan; W Dorndorf
Journal: Stroke Date: 1999-05 Impact factor: 7.914

2. Microvascular BOLD contribution at 4 and 7 T in the human brain: gradient-echo and spin-echo fMRI with suppression of blood effects.

Authors: Timothy Q Duong; Essa Yacoub; Gregory Adriany; Xiaoping Hu; Kâmil Ugurbil; Seong-Gi Kim
Journal: Magn Reson Med Date: 2003-06 Impact factor: 4.668

Quantifying venous flow dynamics by flow-dephased and flow-rephased functional magnetic resonance imaging.

1. Transcranial color-coded duplex sonography of intracranial veins and sinuses in adults. Reference data from 130 volunteers.

2. Microvascular BOLD contribution at 4 and 7 T in the human brain: gradient-echo and spin-echo fMRI with suppression of blood effects.

3. Quantifying the intra- and extravascular contributions to spin-echo fMRI at 3 T.

4. ODIN-object-oriented development interface for NMR.

5. Separation of diffusion and slow flow effects by use of flow rephasing and dephasing.

6. The use of gradient flow compensation to separate diffusion and microcirculatory flow in MRI.

7. Diffusion weighted fMRI at 1.5 T.

8. The effects of random directional distributed flow in nuclear magnetic resonance imaging.

9. Nuclear magnetic resonance blood flow measurements in the human brain.

10. Assessment of normal flow velocity in basal cerebral veins. A transcranial doppler ultrasound study.

Review 1. Current trends and challenges in MRI acquisitions to investigate brain function.