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Does age, sex, and area of substantia nigra echogenicity predict the MRI appearance of nigrosome-1?
J Neurol Sci
January 2025
UniSA Clinical & Health Sciences and Alliance for Research in Exercise, Nutrition and Activity (ARENA), City East Campus, University of South Australia, GPO Box 2471, Adelaide, South Australia 5001, Australia. Electronic address:
The appearance of the substantia nigra (SN) can aid diagnosis of Parkinson's disease (PD). The effect of age and sex on the appearance of nigrosome-1 (SN subregion) on magnetic resonance imaging (MRI), and the relationship between nigrosome-1 (viewed with MRI) and SN echogenicity (viewed with transcranial ultrasound) is unknown. The study aimed to address these knowledge gaps.
View Article and Find Full Text PDFAnatomic Approach to Fetal Hydrocephalus.
Radiographics
February 2025
From the Departments of Radiology and Imaging Sciences (A.M.G., P.J.W., A.M.K.) and Obstetrics and Gynecology (S.E.D.), University of Utah Health, 30 N Mario Capecchi Dr, Salt Lake City, UT 84112; and University of Utah School of Medicine, Salt Lake City, Utah (J.N.C.).
Hydrocephalus is an imprecise term and refers to the imbalance of brain parenchyma and cerebral spinal fluid in the cranial vault. Ventriculomegaly, or enlargement of the ventricular system, is often the more precise term and is therefore preferred. Appropriate imaging and measurement techniques are critical to detect ventriculomegaly and grade its severity.
View Article and Find Full Text PDFRight Ventricle Function: The Role of the Forgotten Chamber in Mitral Valve Surgery.
Curr Cardiol Rep
January 2025
Division of Cardiac Surgery, St. Michael's Hospital, University of Toronto, Toronto, ON, Canada.
Background: Referred to as the "forgotten chamber," the right ventricle (RV) is now widely acknowledged as a significant factor, particularly in certain cardiovascular pathologies. Despite historically being undervalued in comparison to the left ventricle, the RV function is deemed crucial in determining patient outcomes following mitral valve (MV) surgery. In the context of MV surgery, it is important to note that the RV is highly susceptible to dysfunction before, during, and after the surgical procedure.
View Article and Find Full Text PDFBackground: Magnetic resonance elastography (MRE) is an MRI technique that uses mild, externally applied vibrations to quantify the mechanical properties of tissues in vivo. MRE measures, such as stiffness, have been shown to be sensitive to changes in brain health with aging and neurodegeneration. Here we used MRE to characterize differences in brain mechanical properties between individuals with amnestic mild cognitive impairment (aMCI) and cognitively unimpaired subjects (CU).
View Article and Find Full Text PDFBiomarkers.
Alzheimers Dement
December 2024
Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
Background: The relationships of left atrial (LA) dysfunction with cognition are poorly understood. We investigated the associations of LA function with cognitive impairment, etiologic-subtype (neurodegenerative vs. vascular[VCI]), neuroimaging markers of cerebrovascular disease (CeVD) and circulating biomarkers, in subjects without AF.
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