Fourier analysis of cerebrospinal fluid flow velocities : MR imaging study
(1990) In Radiology 177(3). p.659-665- Abstract
An interleaved pseudocinematographic FLASH (fast low-angle shot) sequence with additional pulsed gradients for flow encoding was used to quantify cerebrospinal fluid (CSF) flow velocities and CSF production. Flow-dependent phase information was obtained by subtracting two differently encoded phase images. The phase information in the resultant image was converted to flow velocity with a calibration curve with the slope 26.5 radian · m-1 · sec. The velocity versus time function was Fourier transformed and a continuous curve was fitted to the measured data with use of the first three harmonics. The in vivo measurements showed a significant variation in flow velocities in the cerebral aqueduct (range, 6-51 mm/ sec). Calculated... (More)
An interleaved pseudocinematographic FLASH (fast low-angle shot) sequence with additional pulsed gradients for flow encoding was used to quantify cerebrospinal fluid (CSF) flow velocities and CSF production. Flow-dependent phase information was obtained by subtracting two differently encoded phase images. The phase information in the resultant image was converted to flow velocity with a calibration curve with the slope 26.5 radian · m-1 · sec. The velocity versus time function was Fourier transformed and a continuous curve was fitted to the measured data with use of the first three harmonics. The in vivo measurements showed a significant variation in flow velocities in the cerebral aqueduct (range, 6-51 mm/ sec). Calculated CSF production was in the range of 0.6-1.2 L/24 h. The present method gives valuable information about CSF hydrodynamics in an imaging time of less than 8 minutes.
(Less)
- author
- Thomsen, Carsten ; Ståhlberg, Freddy LU ; Stubgaard, M. and Nordell, Bo
- organization
- publishing date
- 1990-12
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Cerebrospinal fluid, flow dynamics, 10.1214, Cerebrospinal fluid, MR studies, 10.1214, Magnetic resonance (MR), physics, Magnetic resonance (MR), pulse sequences, Phantoms
- in
- Radiology
- volume
- 177
- issue
- 3
- pages
- 659 - 665
- publisher
- Radiological Society of North America
- external identifiers
-
- scopus:0025222655
- pmid:2243965
- ISSN
- 0033-8419
- DOI
- 10.1148/radiology.177.3.2243965
- language
- English
- LU publication?
- yes
- id
- f77d66b1-53ea-4025-9003-525facfe8493
- date added to LUP
- 2023-12-27 13:12:28
- date last changed
- 2024-01-11 00:29:05
@article{f77d66b1-53ea-4025-9003-525facfe8493,
abstract = {{<p>An interleaved pseudocinematographic FLASH (fast low-angle shot) sequence with additional pulsed gradients for flow encoding was used to quantify cerebrospinal fluid (CSF) flow velocities and CSF production. Flow-dependent phase information was obtained by subtracting two differently encoded phase images. The phase information in the resultant image was converted to flow velocity with a calibration curve with the slope 26.5 radian · m<sup>-1</sup> · sec. The velocity versus time function was Fourier transformed and a continuous curve was fitted to the measured data with use of the first three harmonics. The in vivo measurements showed a significant variation in flow velocities in the cerebral aqueduct (range, 6-51 mm/ sec). Calculated CSF production was in the range of 0.6-1.2 L/24 h. The present method gives valuable information about CSF hydrodynamics in an imaging time of less than 8 minutes.</p>}},
author = {{Thomsen, Carsten and Ståhlberg, Freddy and Stubgaard, M. and Nordell, Bo}},
issn = {{0033-8419}},
keywords = {{Cerebrospinal fluid, flow dynamics, 10.1214; Cerebrospinal fluid, MR studies, 10.1214; Magnetic resonance (MR), physics; Magnetic resonance (MR), pulse sequences; Phantoms}},
language = {{eng}},
number = {{3}},
pages = {{659--665}},
publisher = {{Radiological Society of North America}},
series = {{Radiology}},
title = {{Fourier analysis of cerebrospinal fluid flow velocities : MR imaging study}},
url = {{http://dx.doi.org/10.1148/radiology.177.3.2243965}},
doi = {{10.1148/radiology.177.3.2243965}},
volume = {{177}},
year = {{1990}},
}