𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Tracking of cyclic motion with phase-contrast cine MR velocity data

✍ Scribed by Norbert J. Pelc; Maria Drangova; Lorie R. Pelc; Yudong Zhu; Douglas C. Noll; Brett S. Bowman; Robert J. Herfkens

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
816 KB
Volume
5
Category
Article
ISSN
1053-1807

No coin nor oath required. For personal study only.

✦ Synopsis

A method of computing trajectories of objects by using velocity data, particularly as acqulred with phase-contrast magnetic resonance (MR) Imaging. is presented. Starting from a specified location at one time point, the method recursively estimates the trajectory. The effects of measurement noise and eddy current-induced velocity offsets arc analyzed. When the motion is periodic, trajectories can be computed by integrating in both the forward and backward temporal directions. and a linear combination of these trajectories minimizes the d e c t of velocity offsets and maximizes the precision of the combined trajectory. For representative acquisition parameters and signal-tonoise ratios. the limitations due to measurement noise are acceptable. In a phantom with reciprocal rotation. the measured and true trajectories agreed to within 3.3%. Sample trajectory estimates of human myocardial regions are encouraging.

📜 SIMILAR VOLUMES

Validation of cine phase-contrast MR ima
Validation of cine phase-contrast MR imaging for motion analysis
✍ Anila Lingamneni; Peter A. Hardy; Kimerly A. Powell; Norbert J. Pelc; Richard D. 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 844 KB

The accuracy of cine phasecontrast magnetic resonance (MR) imaging for motion analysis was evaluated. By using a rotating phantom and postproceseing algorithm for phase tracking, errors d i n g during data acquisition were identifled and compensation methods were developed. A spatially varying backg

Tracking the motion of skeletal muscle w
Tracking the motion of skeletal muscle with velocity-encoded MR imaging
✍ John E. Drace; Norbert J. Pelc 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 771 KB

## Abstract Phase‐contrast magnetic resonance velocity‐encoding techniques were used to track two‐dimensional movement of skeletal muscle tissue. Axial and longitudinal planes in the forearms of five healthy volunteers were imaged during cyclic flexion and extension of the fingers, and the resultin

Velocity and flow quantitation in the su
Velocity and flow quantitation in the superior sagittal sinus with ungated and cine (gated) phase-contrast MR imaging
✍ John E. Jordan; Norbert J. Pelc; Dieter R. Enzmann 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 568 KB

## Abstract Normal blood flow and velocity in the superior sagittal sinus were measured in 30 patients. A fast two‐dimensional ungated phase‐contrast (PC) pulse sequence was compared with a peripherally gated cine PC technique for velocity and flow quantitation. The same imaging parameters were use

Measurement of skeletal muscle motion in
Measurement of skeletal muscle motion in vivo with phase-contrast MR imaging
✍ John E. Drace; Norbert J. Pelc 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 945 KB

## Abstract The ability to measure skeletal muscle motion with phase‐contrast magnetic resonance (MR) imaging was tested with a motion phantom that simulated muscle activity. Quantitative analytic data on unidimensional, bidirectional skeletal muscle motion measured in vivo was obtained in four hea

Validation of volume flow measurements w
Validation of volume flow measurements with cine phase-contrast MR imaging for peripheral arterial waveforms
✍ Thomas R. McCauley; Constantino S. Pena; Christy K. Holland; Thomas B. Price; Jo 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 680 KB

## Abstract A flow phantom was used to study MR volume flow measurements for monophasic and triphasic waveforms over the flow range expected in peripheral arteries at rest and with exercise (2–24 mL/sec, __n__ = 50). The improvement in accuracy with phase‐correction image processing to eliminate er