✦ LIBER ✦

Quantitative measurement of blood flow using cylindrically localized fourier velocity encoding

✍ Scribed by Charles L. Dumoulin; Steven P. Souza; Christopher J. Hardy; Stephen A. Ash

Publisher: John Wiley and Sons
Year: 1991
Tongue: English
Weight: 587 KB
Volume: 21
Category: Article
ISSN: 0740-3194
DOI: 10.1002/mrm.1910210209

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

A procedure for the quantitative measurement of blood velocity was developed and evaluated in the portal vein, aorta, and vena cava of healthy volunteers. This procedure utilizes Fourier velocity encoding and can be performed with or without cardiac gating. The accuracy of velocity measurements is determined by the accuracy of the gradient subsystem. How measurements derived from the velocity measurement are further limited in their accuracy by the luminal cross‐section measurement. Spatial localization is accomplished with an excitation pulse having a cylindrical rather than slab geometry. Data are acquired in the presence of a readout gradient to provide resolution along the cylindrical axis. © 1991 Academic Press, Inc.

📜 SIMILAR VOLUMES

Blood flow measurement using variable ve

Blood flow measurement using variable velocity encoding in the RR interval

✍ Michael H. Buonocore 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 English ⚖ 661 KB

## Abstract Velocity‐encoded phase imaging using asynchronous gating requires input of a velocity encoding value to set the velocity sensitivity of the pulse sequence. The raw data interpolation and reconstruction scheme that the pulse sequence uses forces the encoding value to be constant througho

Rapid quantitation of cardiovascular flo

Rapid quantitation of cardiovascular flow using slice-selective fourier velocity encoding with spiral readouts

✍ Joao L. A. Carvalho; Krishna S. Nayak 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 477 KB

## Abstract Accurate flow visualization and quantitation is important for the assessment of many cardiovascular conditions such as valvular stenosis and regurgitation. Phase contrast based methods experience partial volume artifacts when flow is highly localized, complex and/or turbulent. Fourier v

Effect of breath holding on blood flow m

Effect of breath holding on blood flow measurement using fast velocity encoded cine MRI

✍ Hajime Sakuma; Nanaka Kawada; Hitoshi Kubo; Yoshiya Nishide; Katsuhiro Takano; N 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 142 KB 👁 2 views

Measuring local velocities of small-scal

Measuring local velocities of small-scale flows using a laser

✍ I. V. Lebedev; B. S. Rinkevichyus; E. V. Yastrebova 📂 Article 📅 1972 🏛 SP MAIK Nauka/Interperiodica 🌐 English ⚖ 201 KB

Further improvement of high-speed NMR fl

Further improvement of high-speed NMR flow-velocity measurement using a differential phase-encoding technique

✍ Y. S. Kim; C. W. Mun; K. J. Jung; Z. H. Cho 📂 Article 📅 1987 🏛 John Wiley and Sons 🌐 English ⚖ 420 KB

An NMR imaging technique applicable to high-velocity flow imaging is described. By subtraction of two phase images obtained by varying the flow-encoding gradient, it is possible to extract much larger ranges of velocity components. This differential phaseencoding technique is tested by experiments i

Feasibility of in vivo measurement of ca

Feasibility of in vivo measurement of carotid wall shear rate using spiral fourier velocity encoded MRI

✍ Joao L. A. Carvalho; Jon-Fredrik Nielsen; Krishna S. Nayak 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 832 KB

## Abstract Arterial wall shear stress is widely believed to influence the formation and growth of atherosclerotic plaque; however, there is currently no gold standard for its in vivo measurement. The use of phase contrast MRI has proved to be challenging due to partial‐volume effects and inadequat