Semiautomatic Analysis of Phase Contrast Magnetic Resonance Imaging of Cerebrospinal Fluid Flow through the Aqueduct of Sylvius

2006 ◽  
Vol 19 (2) ◽  
pp. 78-87 ◽  
Author(s):  
Yudy Natalia Flórez ◽  
David Moratal ◽  
Juana Forner ◽  
Luis Martí-Bonmatí ◽  
Estanislao Arana ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Cerebrospinal Fluid ◽  
Fluid Flow ◽  
Magnetic Resonance ◽  
Phase Contrast ◽  
Resonance Imaging ◽  
Cerebrospinal Fluid Flow ◽  
Phase Contrast Magnetic Resonance ◽  
Contrast Magnetic Resonance ◽  
Flow Through

Phase-contrast MRI Measurement of Systolic Cerebrospinal Fluid Peak Velocity (CSFVPeak) in the Aqueduct of Sylvius

1999 ◽  
Vol 90 (6) ◽  
pp. 1546-1550. ◽  
Author(s):  
Christian Kolbitsch ◽  
Michael Schocke ◽  
Ingo H. Lorenz ◽  
Christian Kremser ◽  
Fritz Zschiegner ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Cerebrospinal Fluid ◽  
Magnetic Resonance ◽  
Intracranial Pressure ◽  
Phase Contrast ◽  
Peak Velocity ◽  
Resonance Imaging ◽  
Phase Contrast Magnetic Resonance ◽  
Aqueduct Of Sylvius ◽  
Contrast Magnetic Resonance

Background Cerebrospinal fluid (CSF) outflow to intra- and extracranial subarachnoid spaces caused by arterial inflow to the brain predominantly compensates systolic increases in cerebral blood volume. Phase-contrast magnetic resonance imaging is a new tool for noninvasive assessment of CSF displacement by measuring CSF peak velocity (CSFV(Peak)). The authors tested this new tool in an experimental human model of increased intracranial pressure and reduced cerebral capacity by means of continuous positive airway pressure (CPAP) breathing. Methods The authors investigated systolic CSFV(Peak) in the aqueduct of Sylvius in 11 awake, normocapnic (end-tidal carbon dioxide [ET(CO2)] = 40 mmHg) volunteers without CPAP and at two different CPAP levels (6 and 12 cm H2O) by means of electroencephalography-gated phase-contrast magnetic resonance imaging. Results Administration of 6 cm H2O CPAP did not change systolic CSFV(Peak) (-4.9+/-2.8 cm/s vs. control: -5.1+/-2.7 cm/s), whereas 12 cm H2O CPAP significantly reduced systolic CSFV(Peak) (-4.0+/-1.8 cm/s vs. control: -5.1+/-2.7 cm/s; P < 0.05). Conclusions These findings in awake volunteers show that monitoring CSFV(Peak) in the aqueduct of Sylvius is a sensitive method for detecting even minor impairment of cerebral capacity caused by experimentally induced increases in intracranial pressure.

Quantitative Assessment of Surgical Decompression of the Cervical Spine with Cine Phase Contrast Magnetic Resonance Imaging

Neurosurgery ◽  
2002 ◽  
Vol 50 (4) ◽  
pp. 791-796 ◽  
Author(s):  
Teiji Tominaga ◽  
Noriaki Watabe ◽  
Toshiyuki Takahashi ◽  
Hiroaki Shimizu ◽  
Takashi Yoshimoto
Keyword(s):  
Magnetic Resonance Imaging ◽  
Cerebrospinal Fluid ◽  
Flow Velocity ◽  
Phase Contrast ◽  
Resonance Imaging ◽  
Cerebrospinal Fluid Flow ◽  
Contrast Magnetic Resonance Imaging ◽  
Phase Contrast Magnetic Resonance ◽  
Contrast Magnetic Resonance ◽  
Cine Phase Contrast

Abstract OBJECTIVE: We measured cerebrospinal fluid flow velocity by use of cine phase contrast magnetic resonance imaging to quantitate the effectiveness of surgical decompression in patients with cervical myelopathy. METHODS: Forty-seven patients with cervical myelopathy attributable to either spondylosis or ossification of the posterior longitudinal ligament were studied. Thirty-five patients underwent anterior cervical decompression and fusion; 12 others underwent expansive laminoplasty. Patients were examined preoperatively and postoperatively by use of a 1.5-T scanner with a pulse-gated cine phase contrast sequence. Cerebrospinal fluid flow direction and velocity in the ventral subarachnoid space were determined at the C1 and T1 levels. Forty-four healthy control subjects were examined to determine normal flow velocity parameters. Severity of cervical myelopathy was evaluated preoperatively and postoperatively by use of Japan Orthopedic Association scores to calculate the extent of recovery. RESULTS: Preoperatively, cerebrospinal fluid flow velocity in the caudal direction was significantly lower at both C1 and T1 than velocities measured in healthy controls. Both decompressive procedures essentially returned patient velocities to control values. Clinical recovery from myelopathy did not differ between anterior and posterior decompression. Postoperative increase in flow velocity correlated with clinical recovery after posterior (P < 0.0008) but not anterior decompression. CONCLUSION: Cine phase contrast magnetic resonance imaging provides quantitative assessment of cervical spine decompression, with particularly good clinical applicability to posterior procedures.

Sign in / Sign up

Export Citation Format

Share Document