Fiberoptic Intracranial Pressure Monitoring during Magnetic Resonance Imaging 

1997 ◽  
Vol 87 (4) ◽  
pp. 1001-1003 ◽  
Author(s):  
Robert E. Grady ◽  
C. Thomas Wass ◽  
Timothy P. Maus ◽  
Joel P. Felmlee
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Intracranial Pressure ◽  
Intracranial Pressure Monitoring ◽  
Resonance Imaging ◽  
Pressure Monitoring

scholarly journals Lhermitte–Duclos Disease: Incidental Finding in Traumatic Cerebral Hemorrhage

2021 ◽  
Author(s):  
Hemant Kumar Beniwal ◽  
Thatikonda Satish ◽  
Gollapudi Prakash Rao ◽  
Musali Siddartha Reddy ◽  
Srikrishnaaditya Manne
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Intracranial Pressure ◽  
Cerebellar Ataxia ◽  
Cerebral Hemorrhage ◽  
Incidental Finding ◽  
Cowden Syndrome ◽  
Young Female ◽  
Resonance Imaging ◽  
Increased Intracranial Pressure

AbstractLhermitte–Duclos disease, also known as dysplastic cerebellar gangliocytoma, is a rare hamartomatous tumor localized in cerebellum. An association with Cowden syndrome is observed in 50% of cases who present with symptoms of increased intracranial pressure and cerebellar ataxia. These patients have specific magnetic resonance imaging and histopathological findings. Surgical resection is the treatment of choice. Here, we report a case of a young female with traumatic frontal hemorrhage associated with Lhermitte–Duclos disease.

scholarly journals Migraine or idiopathic intracranial hypertension: Magnetic resonance venography and magnetic resonance imaging findings

2020 ◽  
Vol 33 (3) ◽  
pp. 244-251
Author(s):  
Aynur Guliyeva ◽  
Melda Apaydin ◽  
Yesim Beckmann ◽  
Gulten Sezgin ◽  
Fazil Gelal
Keyword(s):  
Magnetic Resonance Imaging ◽  
Optic Nerve ◽  
Magnetic Resonance ◽  
Intracranial Pressure ◽  
Pituitary Gland ◽  
Optic Nerve Sheath ◽  
Imaging Findings ◽  
Resonance Imaging ◽  
Chi Square ◽  
Nerve Sheath

Background Idiopathic intracranial hypertension (IIH) is a disease characterised by increased cerebral pressure without a mass or hydrocephalus. We aimed to differentiate migraine and IIH patients based on imaging findings. Results Patients with IIH ( n = 32), migraine patients ( n = 34) and control subjects ( n = 33) were evaluated. Routine magnetic resonance imaging, contrast-enhanced 3D magnetic resonance venography and/or T1-weighted 3D gradient-recalled echo were taken with a 1.5 T magnetic resonance scanner. Optic-nerve sheath distention, flattened posterior globe and the height of the pituitary gland were evaluated in the three groups. Transverse sinuses (TS) were evaluated with respect to score of attenuation/stenosis and distribution. Pearson chi-square, Fisher’s exact test and chi-square trend statistical analyses were used for comparisons between the groups. A p-value of <0.05 was considered statistically significant. Decreased pituitary gland height, optic-nerve sheath distention and flattened posterior globe were found to be statistically significant ( p < 0.001) in IIH patients. Bilateral TS stenosis was also more common in IIH patients than in the control group and migraine group ( p = 0.02). Conclusion Decreased pituitary gland height, optic-nerve sheath distention, flattened posterior globe, bilateral stenosis and discontinuity in TS are significant findings in differentiating IIH cases from healthy individuals and migraine patients. Bilateral TS stenosis may be the cause rather than the result of increased intracranial pressure. The increase in intracranial pressure, which is considered to be responsible for the pathophysiology of IIH, is not involved in the pathophysiology of migraine.

scholarly journals Cerebellar Liponeurocytoma: A Rare Fatty Tumor and its Literature Review

2019 ◽  
Vol 10 (02) ◽  
pp. 360-363 ◽  
Author(s):  
Harsh Deora ◽  
A. R. Prabhuraj ◽  
Jitender Saini ◽  
T. C. Yasha ◽  
Arivazhagan Arimappamagan
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Intracranial Pressure ◽  
Gait Ataxia ◽  
Imaging Features ◽  
Rare Entity ◽  
Raised Intracranial Pressure ◽  
Resonance Imaging ◽  
Cerebellar Liponeurocytoma

ABSTRACTCerebellar liponeurocytoma is a rare oncological entity, and the knowledge about the treatment and outcome of these rare tumors is still evolving. Very few cases have been described in literature. We report a middle-aged male who presented with raised intracranial pressure features and gait ataxia. His imaging features revealed classical features of liponeurocytoma in cerebellar vermis, with abundant fat component evident in both computed tomography and magnetic resonance imaging. He underwent resection of the lesion and has been asymptomatic for 4 years. This report describes the classical radiological and immunohistochemical features of this rare entity with favorable outcome and reviews the existing literature.

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 &lt; 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.

scholarly journals Invasive pressure monitoring of patients during magnetic resonance imaging

1993 ◽  
Vol 40 (11) ◽  
pp. 1092-1095 ◽  
Author(s):  
Katherine H. Taber ◽  
Jeannie Thompson ◽  
Lewis A. Coveler ◽  
L. Anne Hayman
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Resonance Imaging ◽  
Pressure Monitoring ◽  
Invasive Pressure Monitoring

Neurophysiological Monitoring, Magnetic Resonance Imaging, and Histological Assays Confirm the Beneficial Effects of Moderate Hypothermia after Epidural Focal Mass Lesion Development in Rodents

Neurosurgery ◽  
2004 ◽  
Vol 54 (3) ◽  
pp. 701-712 ◽  
Author(s):  
Ralf Burger ◽  
Martin Bendszus ◽  
Giles Hamilton Vince ◽  
Laszlo Solymosi ◽  
Klaus Roosen
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Intracranial Pressure ◽  
Oxygen Pressure ◽  
Lesion Size ◽  
Partial Oxygen Pressure ◽  
Neurophysiological Monitoring ◽  
Moderate Hypothermia ◽  
Resonance Imaging ◽  
Partial Oxygen

Abstract OBJECTIVE To assess the effects of moderate intraischemic hypothermia on neurophysiological parameters in an epidural balloon compression model in rats and to correlate the results with magnetic resonance imaging and histological findings. METHODS Neurophysiological monitoring included laser Doppler flow, tissue partial oxygen pressure, and intracranial pressure measurements and electroencephalographic assessments during balloon expansion, sustained inflation, and reperfusion. Moderate intraischemic cooling of animals was extended throughout the reperfusion period, and results were compared with those for normothermic animals. Moreover, histological morphometric and magnetic resonance imaging volumetric analyses of the lesions were performed. RESULTS Laser Doppler flow decreased slightly during ischemia (P &lt; 0.05) in animals treated with hypothermia, and flow values demonstrated complete reperfusion, compared with incomplete flow restoration in untreated animals (P &lt; 0.05). During ischemia, the tissue partial oxygen pressure was less than 4.3 mm Hg in both groups. After reperfusion, values returned to the normal range in both groups, but the tissue partial oxygen pressure in hypothermic animals was significantly higher (P = 0.042) and demonstrated 19% higher values, compared with normothermic animals, before rewarming. Moderate hypothermia attenuated a secondary increase in intracranial pressure (P &lt; 0.05), and electroencephalographic findings indicated a trend toward faster recovery (P &gt; 0.05) after reperfusion. Lesion size was reduced by 35% in magnetic resonance imaging volumetric evaluations and by 24.5% in histological morphometric analyses. CONCLUSION Intraischemic hypothermia improves cerebral microcirculation, attenuates a secondary increase in intracranial pressure, facilitates electroencephalographic recovery, and reduces the lesion size.

Potential heating caused by intraparenchymal intracranial pressure transducers in a 3-tesla magnetic resonance imaging system using a body radiofrequency resonator: assessment of the Codman MicroSensor Transducer

2008 ◽  
Vol 109 (1) ◽  
pp. 159-164 ◽  
Author(s):  
Virginia F. J. Newcombe ◽  
Robert C. Hawkes ◽  
Sally G. Harding ◽  
Roslyn Willcox ◽  
Sarah Brock ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Intracranial Pressure ◽  
Mr Imaging ◽  
Imaging System ◽  
Resonance Imaging ◽  
Mr Conditional ◽  
Body Coil ◽  
Codman Microsensor ◽  
Head Coil

Magnetic resonance imaging and spectroscopy may provide important clinical information in the acute stages of brain injury. For this to occur it must be ensured that intracranial pressure (ICP) monitoring devices are safe to bring into the MR imaging suite. The authors tested a Codman MicroSensor ICP Transducer (Codman & Shurtleff, Inc.) within a 3-T MR imaging system using the transmit body coil and receive-only coils and the transmit-and-receive head coil. Extreme and rapid heating of 64°C was noted with the transducer wire in certain positions when using the transmit body coil and receive-only head coil. This is consistent with the phenomenon of resonance, and the probe was shown to have a distinct resonant response when coupled to HP 4195A Network Analyzer (Hewlett Packard). Coiling some of the transducer wire outside of the receive-only head coil reduced the generated current and so stopped the thermogenesis. This may be due to the introduction of a radiofrequency choke. The ICP transducer performed within clinically acceptable limits in both the static magnetic field and during imaging with high radiofrequency power when the excess wire was in this configuration. No heating was observed when a transmit-and-receive head coil was used. This study has shown when using a high-field magnet, the Codman ICP probe is MR conditional. That is, in the authors' system, it can be safely used with the transmit-and-receive head coil, but when using the transmit body coil the transducer wire must be coiled into concentric loops outside of the receive-only head coil.

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