scholarly journals Erratum

1995 ◽  
Vol 15 (4) ◽  
pp. 719-719
Keyword(s):  
Magnetic Resonance Imaging ◽  
Blood Flow ◽  
Electrical Impedance ◽  
Neonatal Rat ◽  
Print Quality ◽  
Resonance Imaging ◽  
Excitotoxic Injury ◽  
Cereb Blood Flow ◽  
Neonatal Rat Brain

Early Evolution and Recovery from Excitotoxic Injury in the Neonatal Rat Brain: A Study Combining Magnetic Resonance Imaging, Electrical Impedance, and Histology Menno van Lookeren Campagne, Jeroen B. Verheul, Klaas Nicolay and Robert Balázs [Originally published in J Cereb Blood Flow Metab 1994;14(6):JOll-J023] The print quality of Fig. 6G in the above article was poor and the figure therefore lacked the necessary detail. The publisher apologizes for this and reprints Fig. 6 , in its entirely, with the legend below. [Figure: see text]

scholarly journals Early Evolution and Recovery from Excitotoxic Injury in the Neonatal Rat Brain: A Study Combining Magnetic Resonance Imaging, Electrical Impedance, and Histology

1994 ◽  
Vol 14 (6) ◽  
pp. 1011-1023 ◽  
Author(s):  
Menno van Lookeren Campagne ◽  
Jeroen B. Verheul ◽  
Klaas Nicolay ◽  
Robert Balázs
Keyword(s):  
Magnetic Resonance Imaging ◽  
Nmda Receptor ◽  
Magnetic Resonance ◽  
Electrical Impedance ◽  
Neonatal Rat ◽  
Lesion Volume ◽  
Resonance Imaging ◽  
Mk 801 ◽  
Image Intensity

We explored the therapeutic potentials of two N-methyl-d-aspartate (NMDA) receptor antagonists in vivo using different techniques. NMDA injected into the striatum of neonatal rats (20 nmol/0.5 μl) induced a rapid increase in the diffusion-weighted (DW) image intensity, spreading over a large part of the ipsilateral hemisphere. Subcutaneous injection of the NMDA receptor antagonist MK-801 (1 mg/kg) or d-( E)-4-(3-phosphono-2-prop-enyl)-2-piperazine-carboxylic acid (D-CPPene; 1.5 mg/kg) reversed both the volume and the grading of the NMDA-induced hyperintensity of DW images, the reversal by MK-801 being more rapid than that by D-CPPene. In the cerebral cortex, there was an inverse relationship between changes in DW image intensity and the size of the extracellular space, assessed by electrical impedance measurements. The reduction of the hyperintense volume in DW images 1 or 2 h after MK-801 or D-CPPene treatment of NMDA-injected animals depended on the type of antagonist used and on the interval between intrastriatal NMDA injection and antagonist treatment. The reduction was 95% when MK-801 was given with a delay of 90 min and decreased to 20% when it was given at 360 min. With D-CPPene, the reduction was 80% after a delay of 30 min and virtually absent when it was administered at 360 min. Quantitative analysis showed significant correlations between the residual hyperintense volume 1 or 2 h after MK-801 or D-CPPene treatment and the final lesion volume, assessed from either T2-weighted images ( R = 0.89, p < 0.001) or histology ( R = 0.80, p < 0.001) 5 days after the insult. This study illustrates the sensitivity of DW magnetic resonance imaging to monitor in vivo early events after an excitotoxic insult and the effect of putative protective drugs that may counteract the resulting damage.

Functional Magnetic Resonance Imaging Measures of Blood Flow Patterns in the Human Auditory Cortex in Response to Sound

1998 ◽  
Vol 41 (3) ◽  
pp. 538-548 ◽  
Author(s):  
Sean C. Huckins ◽  
Christopher W. Turner ◽  
Karen A. Doherty ◽  
Michael M. Fonte ◽  
Nikolaus M. Szeverenyi
Keyword(s):  
Magnetic Resonance Imaging ◽  
Blood Flow ◽  
Magnetic Resonance ◽  
Functional Magnetic Resonance Imaging ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Speech Stimuli ◽  
Complex Stimuli ◽  
Scanning Session ◽  
Auditory Research

Functional Magnetic Resonance Imaging (fMRI) holds exciting potential as a research and clinical tool for exploring the human auditory system. This noninvasive technique allows the measurement of discrete changes in cerebral cortical blood flow in response to sensory stimuli, allowing determination of precise neuroanatomical locations of the underlying brain parenchymal activity. Application of fMRI in auditory research, however, has been limited. One problem is that fMRI utilizing echo-planar imaging technology (EPI) generates intense noise that could potentially affect the results of auditory experiments. Also, issues relating to the reliability of fMRI for listeners with normal hearing need to be resolved before this technique can be used to study listeners with hearing loss. This preliminary study examines the feasibility of using fMRI in auditory research by performing a simple set of experiments to test the reliability of scanning parameters that use a high resolution and high signal-to-noise ratio unlike that presently reported in the literature. We used consonant-vowel (CV) speech stimuli to investigate whether or not we could observe reproducible and consistent changes in cortical blood flow in listeners during a single scanning session, across more than one scanning session, and in more than one listener. In addition, we wanted to determine if there were differences between CV speech and nonspeech complex stimuli across listeners. Our study shows reproducibility within and across listeners for CV speech stimuli. Results were reproducible for CV speech stimuli within fMRI scanning sessions for 5 out of 9 listeners and were reproducible for 6 out of 8 listeners across fMRI scanning sessions. Results of nonspeech complex stimuli across listeners showed activity in 4 out of 9 individuals tested.

A case of prenatal diagnosis of corpus callosum lipoma

2020 ◽  
Author(s):  
A.I. Zamiatina, M.V. Medvedev
Keyword(s):  
Magnetic Resonance Imaging ◽  
Blood Flow ◽  
Prenatal Diagnosis ◽  
Magnetic Resonance ◽  
Corpus Callosum ◽  
Color Doppler ◽  
Septum Pellucidum ◽  
Resonance Imaging

A case of prenatal diagnosis of the corpus callosum lipoma at 32–33 weeks of gestation is presented. In a consultative examination, a hyperechoic formation with clear contours was found in the projection of the septum pellucidum, occupying the rostrum, genu, and truncus of corpus callosum, without signs of intratumorally blood flow in the color Doppler mapping mode. The prenatal diagnosis of "callosum lipoma" was established, confirmed after the birth of a child during magnetic resonance imaging.

Bias and Precision in Magnetic Resonance Imaging‐Based Estimates of Renal Blood Flow: Assessment by Triangulation

2021 ◽  
Author(s):  
Bashair A. Alhummiany ◽  
David Shelley ◽  
Margaret Saysell ◽  
Maria‐Alexandra Olaru ◽  
Bernd Kühn ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Blood Flow ◽  
Magnetic Resonance ◽  
Renal Blood Flow ◽  
Resonance Imaging

Diagnosis of thrombus and blood flow in aortic aneurysm by use of tagging cine magnetic resonance imaging

2011 ◽  
Vol 6 (03) ◽  
pp. 203-206
Author(s):  
Toshio Honda ◽  
Mareomi Hamada ◽  
Yuji Matsumoto ◽  
Hiroshi Matsuoka ◽  
Kunio Hiwada
Keyword(s):  
Magnetic Resonance Imaging ◽  
Blood Flow ◽  
Magnetic Resonance ◽  
Aortic Aneurysm ◽  
Cine Magnetic Resonance Imaging ◽  
Resonance Imaging
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