Effects of gadoxetic acid on image quality of arterial multiphase magnetic resonance imaging of liver: comparison study with gadoteric acid-enhanced MRI

AbstractPurposeTo compare the effects of gadoxetic acid and gadoteric acid on the image quality of single-breath-hold, triple (first, second, and third) arterial hepatic magnetic resonance imaging (MRI).MethodsTwo hundred and eleven patients were divided into two groups according to the contrast materials used (gadoxetic acid, 108 patients and gadoteric acid, 103 patients). All 3.0-T MR examinations included triple arterial phase acquisition using the 4D enhanced T1-weighted high-resolution isotropic volume examination (eTHRIVE) keyhole technique. The image qualities of the pre-contrast and triple arterial phases were assessed in terms of image artifacts, sharpness of the intrahepatic vessel and liver edge, and overall image quality with a 5-point scale for qualitative analysis.ResultsThe image quality of gadoxetic acid-enhanced liver MRI in the triple arterial phases was significantly degraded compared with that of gadoteric acid-enhanced liver MRI, although better image scores were observed in the pre-contrast  images in the gadoxetic acid group (P 
Source: Abdominal Imaging - Category: Radiology Source Type: research

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Conclusion: The development of LRSS pneumatization affects the removal rate of CS tumors in PAs. Preoperative analysis of LRSS development should be considered when planning EES against PA with CS invasion. PMID: 31819816 [PubMed]
Source: Surgical Neurology International - Category: Neurosurgery Tags: Surg Neurol Int Source Type: research
We describe an extremely rare case of SFT in the left preauricular region. The tumor lesion had gradually grown without pain or facial paralysis. Magnetic resonance imaging scan showed a circumscribed mass with high signal intensity on Gd-DTPA-enhanced T1-weighted images measuring approximately 3.0 cm in diameter. The tumor lesion was excised completely. Histological examination of the surgical specimen revealed proliferation of spindle tumor cells with a patternless pattern. Various amounts of collagen bundles intervened in the spindle tumor cells. The cellular atypia of the tumor cells was weak. Immunohistochemical studi...
Source: Journal of Oral and Maxillofacial Surgery, Medicine, and Pathology - Category: ENT & OMF Source Type: research
Publication date: Available online 11 December 2019Source: NeuroImageAuthor(s): Kenneth Wengler, Xiang He, Anissa Abi-Dargham, Guillermo HorgaAbstractNeuromelanin-sensitive MRI (NM-MRI) provides a noninvasive measure of the content of neuromelanin (NM), a product of dopamine metabolism that accumulates with age in dopamine neurons of the substantia nigra (SN). NM-MRI has been validated as a measure of both dopamine neuron loss, with applications in neurodegenerative disease, and dopamine function, with applications in psychiatric disease. Furthermore, a voxelwise-analysis approach has been validated to resolve substructure...
Source: NeuroImage - Category: Neuroscience Source Type: research
Publication date: Available online 11 December 2019Source: NeuroImageAuthor(s): Thomas A.W. Bolton, Valeria Kebets, Enrico Glerean, Daniela Zöller, Jingwei Li, B.T. Thomas Yeo, César Caballero-Gaudes, Dimitri Van De VilleAbstractThe impact of in-scanner motion on functional magnetic resonance imaging (fMRI) data has a notorious reputation in the neuroimaging community. State-of-the-art guidelines advise to scrub out excessively corrupted frames as assessed by a composite framewise displacement (FD) score, to regress out models of nuisance variables, and to include average FD as a covariate in group-level analys...
Source: NeuroImage - Category: Neuroscience Source Type: research
This study was approved by the institutional review board. Sixty patients diagnosed with cervical cancer by pathology were prospectively included. Female pelvic magnetic resonance imaging was performed using a 3 T magnetic resonance scanner; B1 and B2 images were obtained for evaluation. Two radiologists blinded to the scan parameters evaluated the images for signal loss in the background, spatial distortion, image ghosting, confidence in the lesion delineation, and overall image quality using a 5-point scoring system. The scores were compared using a paired Wilcoxon test. SI was measured in the B1 and B2 images for...
Source: European Journal of Radiology - Category: Radiology Source Type: research
Publication date: Available online 9 December 2019Source: NeuroImage: ClinicalAuthor(s): Yunzhe Xue, Fadi G. Farhat, Olga Boukrina, A.M. Barrett, Jeffrey R. Binder, Usman W. Roshan, William W. GravesAbstractAutomatic identification of brain lesions from magnetic resonance imaging (MRI) scans of stroke survivors would be a useful aid in patient diagnosis and treatment planning. It would also greatly facilitate the study of brain-behavior relationships by eliminating the laborious step of having a human expert manually segment the lesion on each brain scan. We propose a multi-modal multi-path convolutional neural network sys...
Source: NeuroImage: Clinical - Category: Radiology Source Type: research
ConclusionsThis study provides information about Aβ plaque burden, tau tangle burden, and neurodegeneration in cognitively unimpaired persons at three levels of genetic risk for AD. Unimpaired APOE ϵ4 HMs can be studied before their 70s to evaluate the understanding of factors, processes, and interventions involved in the predisposition to and prevention of AD, and after their 70s, to discover factors, processes, and interventions involved in the resilience or resistance to and prevention of AD.
Source: Alzheimer's and Dementia: The Journal of the Alzheimer's Association - Category: Geriatrics Source Type: research
Publication date: Available online 9 December 2019Source: NeuroImageAuthor(s): Robert A. Brown, Dumitru Fetco, Robert Fratila, Giulia Fadda, Shangge Jiang, Nuha M. Alkhawajah, E. Ann Yeh, Brenda Banwell, Amit Bar-Or, Douglas L. Arnold, Canadian Pediatric Demyelinating Disease NetworkAbstractIn conventional non-quantitative magnetic resonance imaging, image contrast is consistent within images, but absolute intensity can vary arbitrarily between scans. For quantitative analysis of intensity data, images are typically normalized to a consistent reference. The most convenient reference is a tissue that is always present in th...
Source: NeuroImage - Category: Neuroscience Source Type: research
The use of cadavers for radiology research methodologies involving subjective image quality evaluation of anatomical criteria is well-documented. The purpose of this method comparison study was to evaluate the...
Source: Acta Veterinaria Scandinavica - Category: Veterinary Research Authors: Tags: Research Source Type: research
AbstractObjectiveTo assess interobserver reproducibility of different regions of interest (ROIs) on multi-parametric renal MRI using commercially available software.Materials and methodsHealthy volunteers (HV), patients with heart failure (HF) and renal transplant recipients (Tx) were recruited. Localiser scans, T1 mapping and pseudo-continuous arterial spin labelling (pCASL) were performed. HV and Tx also underwent diffusion-weighted imaging to allow calculation of apparent diffusion coefficient (ADC). For T1, pCASL and ADC, ROIs were drawn for whole kidney (WK), cortex (Cx), user-defined representative cortex (rep-Cx) an...
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - Category: Materials Science Source Type: research
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