Structural Abnormalities in Pediatric Moyamoya Disease Revealed by Clinical Magnetic Resonance Imaging, Regionally Distributed Relative Signal Intensities and Volumes

2021 ◽  
Author(s):  
Prahar Ijner ◽  
Grace Tompkins ◽  
Tadashi Shiohama ◽  
Emi Takahashi ◽  
Jacob Levman
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Moyamoya Disease ◽  
Resonance Imaging ◽  
Clinical Magnetic Resonance Imaging ◽  
Structural Abnormalities ◽  
Signal Intensities

Quantitative tomographic evaluation of cerebral perfusion with perfusion weighted magnetic resonance imaging in the patients with moyamoya disease

2005 ◽  
Vol 25 (1_suppl) ◽  
pp. S339-S339
Author(s):  
Yoji Tanaka ◽  
Tadashi Nariai ◽  
Tsukasa Nagaoka ◽  
Kiichi Ishiwata ◽  
Michio Senda ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Moyamoya Disease ◽  
Cerebral Perfusion ◽  
Resonance Imaging ◽  
Weighted Magnetic Resonance Imaging

Looking Beyond the Surface of Adult Moyamoya Disease: Brain Magnetic Resonance Imaging Microstructural Changes and Cognitive Dysfunction

2015 ◽  
Vol 84 (1) ◽  
pp. 18-20
Author(s):  
Youssef J. Hamade ◽  
Rami James N. Aoun ◽  
Samer G. Zammar ◽  
Stacie E. DeMent ◽  
Naresh P. Patel ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Cognitive Dysfunction ◽  
Moyamoya Disease ◽  
Brain Magnetic Resonance Imaging ◽  
Resonance Imaging ◽  
Microstructural Changes ◽  
Adult Moyamoya Disease

scholarly journals Numerical Analysis of a Flexible Dual Loop Coil and its Experimental Validation for pre-Clinical Magnetic Resonance Imaging of Rodents at 7 T

2016 ◽  
Vol 16 (6) ◽  
pp. 294-299 ◽  
Author(s):  
S. Solis-Najera ◽  
F. Vazquez ◽  
R. Hernandez ◽  
O. Marrufo ◽  
A.O. Rodriguez
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Imaging System ◽  
Ex Vivo ◽  
Small Animal ◽  
Magnetic Resonance Imaging System ◽  
External Diameter ◽  
Rf Coil ◽  
Resonance Imaging ◽  
Clinical Magnetic Resonance Imaging

Abstract A surface radio frequency coil was developed for small animal image acquisition in a pre-clinical magnetic resonance imaging system at 7 T. A flexible coil composed of two circular loops was developed to closely cover the object to be imaged. Electromagnetic numerical simulations were performed to evaluate its performance before the coil construction. An analytical expression of the mutual inductance for the two circular loops as a function of the separation between them was derived and used to validate the simulations. The RF coil is composed of two circular loops with a 5 cm external diameter and was tuned to 300 MHz and 50 Ohms matched. The angle between the loops was varied and the Q factor was obtained from the S11 simulations for each angle. B1 homogeneity was also evaluated using the electromagnetic simulations. The coil prototype was designed and built considering the numerical simulation results. To show the feasibility of the coil and its performance, saline-solution phantom images were acquired. A correlation of the simulations and imaging experimental results was conducted showing a concordance of 0.88 for the B1 field. The best coil performance was obtained at the 90° aperture angle. A more realistic phantom was also built using a formaldehyde-fixed rat phantom for ex vivo imaging experiments. All images showed a good image quality revealing clearly defined anatomical details of an ex vivo rat.

scholarly journals Histopathological Findings of Human Thyroid Tumors and Signal Intensities of Magnetic Resonance Imaging (MRI).

1994 ◽  
Vol 97 (8) ◽  
pp. 1406-1411 ◽  
Author(s):  
TAKESHI KUSUNOKI ◽  
KIYOTAKA MURATA ◽  
SHOZO NISHID ◽  
TAKANORI TOMURA ◽  
MASAAKI INOUE
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Human Thyroid ◽  
Thyroid Tumors ◽  
Resonance Imaging ◽  
Histopathological Findings ◽  
Magnetic Resonance Imaging Mri ◽  
Signal Intensities

Abstract WMP71: Moyamoya-atherosclerosis Syndrome: Clinical and High-resolution Magnetic Resonance Imaging Features

Stroke ◽  
2017 ◽  
Vol 48 (suppl_1) ◽  
Author(s):  
Lian Duan ◽  
Wei-Hai Xu ◽  
Cong Han
Keyword(s):  
Magnetic Resonance Imaging ◽  
Risk Factors ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Moyamoya Disease ◽  
Treatment Strategies ◽  
Diagnostic Process ◽  
Imaging Features ◽  
Intracranial Atherosclerosis ◽  
Resonance Imaging

Introduction: The diagnosis in the patients with angiographic moyamoya findings and atherogenic risk factors is challenging. In this study, we try to incorporate high-resolution magnetic resonance imaging (HRMRI) into the diagnostic process of intracranial atherosclerosis associated moyamoya syndrome. Methods: From March 2013 to March 2014, HRMRI was consecutively performed on adult patients with angiographic moyamoya. The patients were classified as moyamoya - plaques (MMD-P) if a plaque could be identified or as moyamoya - no plaques (MMD-NP) if a plaque could not be identified. The angiography, HRMRI findings and atherogenic risk factors of these patients were analyzed. Results: Fifty-one patients (mean age 39±9, 20 males) were enrolled. On traditional angiography, probable intracranial atherosclerosis was identified in 5 patients, no definite diagnosis in 12 patients, and moyamoya disease in 34 patients. On HRMRI, 15 out of 32 patients with risk factors and 4 out of 19 patients without risk factors were found to have plaques and were diagnosed as MMD-P, while the other 32 patients were diagnosed as MMD-NP. The MMD-P patients were more likely to be older and male and were less likely to have cerebral hemorrhage and a history of disease progression. Conclusions: Our study suggests that HRMRI can help diagnose intracranial atherosclerosis more accurately in moyamoya disease patients with atherogenic risk factors. The distinct clinical features between MMD-P and MMD-NP patients suggest different underlying pathophysiology and therefore potentially different treatment strategies.

scholarly journals The ivy sign

2014 ◽  
Vol 18 (1) ◽  
Author(s):  
Nasreen Mahomed ◽  
Evance Chisama ◽  
Sanjay Prabhu
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Moyamoya Disease ◽  
Signal Intensity ◽  
Perivascular Spaces ◽  
Resonance Imaging ◽  
Leptomeningeal Enhancement ◽  
Weighted Magnetic Resonance Imaging ◽  
Mri Sequences ◽  
Magnetic Resonance Imaging Mri

The ivy sign refers to diffuse bilateral leptomeningeal enhancement on post- contrastT1-weighted magnetic resonance imaging (MRI) and increased signal intensity in bilateralsubarachnoid spaces and perivascular spaces on T2-weighted fluid attenuation inversionrecovery (FLAIR) MRI sequences in patients with moyamoya disease.

scholarly journals Identifying Hypoperfusion in Moyamoya Disease With Arterial Spin Labeling and an [ 15 O]-Water Positron Emission Tomography/Magnetic Resonance Imaging Normative Database

Stroke ◽  
2019 ◽  
Vol 50 (2) ◽  
pp. 373-380 ◽  
Author(s):  
Audrey P. Fan ◽  
Mohammad M. Khalighi ◽  
Jia Guo ◽  
Yosuke Ishii ◽  
Jarrett Rosenberg ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Positron Emission Tomography ◽  
Magnetic Resonance ◽  
Moyamoya Disease ◽  
Arterial Spin Labeling ◽  
Spin Labeling ◽  
Emission Tomography ◽  
Resonance Imaging ◽  
Normative Database ◽  
Positron Emission

scholarly journals High-resolution Magnetic Resonance Imaging of Moyamoya Disease

2015 ◽  
Vol 128 (23) ◽  
pp. 3231-3237 ◽  
Author(s):  
Le-Bao Yu ◽  
Qian Zhang ◽  
Zhi-Yong Shi ◽  
Ming-Qiu Wang ◽  
Dong Zhang
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Moyamoya Disease ◽  
Resonance Imaging
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