Brain venous volume above the lateral ventricle in military patients with traumatic brain injury (TBI) was assessed using two segmentation approaches on susceptibility weighted images (SWI) and quantitative susceptibility maps (QSM).
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Hearing impairment after subarachnoid hemorrhage
Subarachnoid hemorrhage (SAH) survivors experience significant neurological disability, some of which is under‐recognized by neurovascular clinical teams. We set out to objectively determine the occurrence of hearing impairment after SAH, characterize its peripheral and/or central origin, and investigate likely pathological…
Cerebral microbleed detection using Susceptibility Weighted Imaging and deep learning
Detecting cerebral microbleeds (CMBs) is important in diagnosing a variety of diseases including dementia, stroke and traumatic brain injury. However, manual detection of CMBs can be time-consuming and prone to errors, whereas the current automatic algorithms for CMB detection are…
Increased Iron Deposition of Deep Cerebral Gray Matter Structures in Hemodialysis Patients: A Longitudinal Study Using Quantitative Susceptibility Mapping
The purpose of this prospective longitudinal study was to investigate the longitudinal changes of iron deposition in hemodialysis patients using quantitative susceptibility mapping (QSM) and correlate these findings with the longitudinal changes of neurocognitive function and clinical factors.
Quantitative MR image processing opens up new avenues of treatment for Traumatic Brain Injury (TBI) in Veterans
For many, the term Traumatic Brain Injury (TBI) brings to mind the 2015 film “Concussion”, starring Will Smith and based on the true story of Dr. Bennett Omalu, who discovered the link between repeated trauma to the head endured by…
Reduced deep regional cerebral venous oxygen saturation in hemodialysis patients using quantitative susceptibility mapping
In this study, we aim to explore the deep regional cerebral venous oxygen saturation (SvO2)from straight sinus using quantitative susceptibility mapping (QSM) and the correlation with clinical risk factors and neuropsychiatric testing.
Susceptibility Weighted Imaging and Quantitative Susceptibility Mapping of the Cerebral Vasculature Using Ferumoxytol
Abstract Purpose—To demonstrate the potential of imaging cerebral arteries and veins with ferumoxytol using susceptibility weighted imaging (SWI) and quantitative susceptibility mapping (QSM). Materials and Methods—The relationships between ferumoxytol concentration and the apparent susceptibility at 1.5T, 3T, and 7T were determined using phantom data; the ability of visualizing subvoxel vessels was evaluated using simulations; and… “Susceptibility Weighted Imaging and Quantitative Susceptibility Mapping of the Cerebral Vasculature Using Ferumoxytol”
STrategically Acquired Gradient Echo (STAGE) imaging, part II: Correcting for RF inhomogeneities in estimating T1 and proton density
The purpose of this study was to develop a method for mapping the B1 transmit (B1t) and B1 receive (B1r) fields from two gradient echo datasets each with a different flip angle and from these two images obtain accurate T1…
An interleaved sequence for simultaneous magnetic resonance angiography (MRA), susceptibility weighted imaging (SWI) and quantitative susceptibility mapping (QSM)
The purpose of this study was to image the entire vasculature of the brain with complete suppression of signal from background tissue using a single 3D excitation interleaved rephased/dephased multi-echo gradient echo sequence. This ensures no loss of signal from…
Characteristics of Cerebral Microbleeds
Cerebral microbleeds (CMBs) are increasingly recognized neuroimaging findings, occurring with cerebrovascular disease, dementia, and aging. This review summarizes the concepts, cause or risk factors, histopathological mechanisms, and clinical consequences of CMBs.
