Sökning: WFRF:(Thomsen M.)
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Fourier analysis of...
Fourier analysis of cerebrospinal fluid flow velocities : MR imaging study
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- Thomsen, Carsten (författare)
- Hvidovre Hospital
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- Ståhlberg, Freddy (författare)
- Lund University,Lunds universitet,Diagnostisk radiologi, Lund,Sektion V,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Medicinsk strålningsfysik, Lund,Institutionen för kliniska vetenskaper, Lund,MR Physics,Forskargrupper vid Lunds universitet,Diagnostic Radiology, (Lund),Section V,Department of Clinical Sciences, Lund,Faculty of Medicine,Medical Radiation Physics, Lund,Department of Clinical Sciences, Lund,Lund University Research Groups
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- Stubgaard, M. (författare)
- Hvidovre Hospital
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- Nordell, Bo (författare)
- Stockholm University
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(creator_code:org_t)
- Radiological Society of North America (RSNA), 1990
- 1990
- Engelska.
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Ingår i: Radiology. - : Radiological Society of North America (RSNA). - 0033-8419 .- 1527-1315. ; 177:3, s. 659-665
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Radiologi och bildbehandling (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Radiology, Nuclear Medicine and Medical Imaging (hsv//eng)
Nyckelord
- Cerebrospinal fluid, flow dynamics, 10.1214
- Cerebrospinal fluid, MR studies, 10.1214
- Magnetic resonance (MR), physics
- Magnetic resonance (MR), pulse sequences
- Phantoms
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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