Is orbital susceptibility-weighted imaging superior to standard brain gradient echo sequences for detecting retinal hemorrhages?

2021 ◽  
Author(s):  
André Vaz
Keyword(s):  
Susceptibility Weighted Imaging ◽  
Gradient Echo ◽  
Retinal Hemorrhages

scholarly journals Juxtacortical susceptibility changes in progressive multifocal leukoencephalopathy at the gray–white matter junction correlates with iron-enriched macrophages

2021 ◽  
pp. 135245852199965
Author(s):  
Kedar R Mahajan ◽  
Moein Amin ◽  
Matthew Poturalski ◽  
Jonathan Lee ◽  
Danielle Herman ◽  
...  
Keyword(s):  
White Matter ◽  
Progressive Multifocal Leukoencephalopathy ◽  
Central Nervous System Lymphoma ◽  
Susceptibility Weighted Imaging ◽  
Resonance Imaging ◽  
Gradient Echo ◽  
Total N ◽  
Mri Brain ◽  
Fluid Attenuated Inversion Recovery ◽  
Magnetic Resonance Imaging Mri

Objective: Describe magnetic resonance imaging (MRI) susceptibility changes in progressive multifocal leukoencephalopathy (PML) and identify neuropathological correlates. Methods: PML cases and matched controls with primary central nervous system lymphoma (PCNSL) were retrospectively identified. MRI brain at 3 T and 7 T were reviewed. MRI-pathology correlations in fixed brain autopsy tissue were conducted in three subjects with confirmed PML. Results: With PML ( n = 26 total, n = 5 multiple sclerosis natalizumab-associated), juxtacortical changes on susceptibility-weighted imaging (SWI) or gradient echo (GRE) sequences were noted in 3/3 cases on 7 T MRI and 14/22 cases (63.6%) on 1.5 T or 8/22 (36.4%) 3 T MRI. Similar findings were only noted in 3/25 (12.0%) of PCNSL patients (odds ratio (OR) 12.83, 95% confidence interval (CI), 2.9–56.7, p < 0.001) on 1.5 or 3 T MRI. On susceptibility sequences available prior to diagnosis of PML, 7 (87.5%) had changes present on average 2.7 ± 1.8 months (mean ± SD) prior to diagnosis. Postmortem 7 T MRI showed SWI changes corresponded to areas of increased iron density along the gray–white matter (GM-WM) junction predominantly in macrophages. Conclusion: Susceptibility changes in PML along the GM-WM junction can precede noticeable fluid-attenuated inversion recovery (FLAIR) changes and correlates with iron accumulation in macrophages.

scholarly journals Fat-Water Interface on Susceptibility-Weighted Imaging and Gradient-Echo Imaging: Comparison of Phantoms to Intracranial Lipomas

2013 ◽  
Vol 201 (4) ◽  
pp. 902-907 ◽  
Author(s):  
Taha M. Mehemed ◽  
Akira Yamamoto ◽  
Tomohisa Okada ◽  
Mitsunori Kanagaki ◽  
Yasutaka Fushimi ◽  
...  
Keyword(s):  
Susceptibility Weighted Imaging ◽  
Water Interface ◽  
Gradient Echo ◽  
Gradient Echo Imaging

Susceptibility-weighted imaging of retinal hemorrhages in abusive head trauma

2018 ◽  
Vol 49 (2) ◽  
pp. 210-216 ◽  
Author(s):  
Krishnamoorthy Thamburaj ◽  
Ajay Soni ◽  
Lori D. Frasier ◽  
Kyaw N. Tun ◽  
Sarah R. Weber ◽  
...  
Keyword(s):  
Head Trauma ◽  
Abusive Head Trauma ◽  
Susceptibility Weighted Imaging ◽  
Retinal Hemorrhages

Retinal Hemorrhages in Nonaccidental Trauma: Look at Susceptibility-Weighted Imaging on Pediatric MRI

2015 ◽  
Vol 52 (4) ◽  
pp. 464-465 ◽  
Author(s):  
Rosa M. Polan ◽  
Andrea Poretti ◽  
Joseph M. Scheller ◽  
Thierry A.G.M. Huisman ◽  
Thangamadhan Bosemani
Keyword(s):  
Susceptibility Weighted Imaging ◽  
Retinal Hemorrhages ◽  
Nonaccidental Trauma ◽  
Pediatric Mri

scholarly journals Clinical Significance of T2*gradient-recalled Echo/susceptibility-weighted Imaging Sequences in Evaluating Superficial Siderosis in the Setting of Intracerebral Tumors: Pilocytic Astrocytoma

2018 ◽  
Vol 8 ◽  
pp. 36
Author(s):  
Sankarsh N. Jetty ◽  
Zain Badar ◽  
Douglas Drumsla ◽  
Rajiv Mangla
Keyword(s):  
Magnetic Resonance Imaging ◽  
Spinal Cord ◽  
Pilocytic Astrocytoma ◽  
Superficial Siderosis ◽  
Susceptibility Weighted Imaging ◽  
Resonance Imaging ◽  
Gradient Echo ◽  
Common Cause ◽  
Brain And Spinal Cord ◽  
The Brain

Superficial siderosis is the slow accumulation of hemosiderin on the pial surfaces of the brain and spinal cord. The most common cause of intracranial superficial siderosis is secondary to subarachnoid hemorrhage. Rarely, superficial siderosis can also be caused by tumors. Superficial siderosis presents clinically as hearing loss and gait instability that progressively worsen. The diagnosis is primarily made by magnetic resonance imaging; however, susceptibility-weighted imaging (SWI) and T2* gradient echo (GRE) sequences demonstrate the highest sensitivity in detecting this condition. To the best of our knowledge, there has been only one previous case of superficial siderosis secondary to a pilocytic astrocytoma of the spine. However, we present a case of intracerebral pilocytic astrocytoma resulting in superficial siderosis, with emphasis on acquisition and use of T2*GRE/SWI sequences.

scholarly journals Susceptibility weighted imaging depicts retinal hemorrhages in abusive head trauma

2013 ◽  
Vol 55 (7) ◽  
pp. 889-893 ◽  
Author(s):  
Giulio Zuccoli ◽  
Ashok Panigrahy ◽  
Anshul Haldipur ◽  
Dennis Willaman ◽  
Janet Squires ◽  
...  
Keyword(s):  
Head Trauma ◽  
Abusive Head Trauma ◽  
Susceptibility Weighted Imaging ◽  
Retinal Hemorrhages
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