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dementia MRI

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https://www.readbyqxmd.com/read/29452906/extracranial-arterial-wall-volume-is-increased-and-shows-relationships-with-vascular-mri-measures-in-idiopathic-parkinson-s-disease
#1
Stephen Ball, Sarah Al-Bachari, Laura M Parkes, Hedley C A Emsley, Charles N McCollum
OBJECTIVE: Idiopathic Parkinson's disease (IPD) is the second most common neurodegenerative disorder, often complicated by dementia. Cardiovascular risk factors and spontaneous cerebral emboli (SCE) are strongly associated with Alzheimer's (AD) and vascular dementia (VaD). We measured SCE in the middle cerebral artery and arterial wall volume in the extracranial arteries in patients with IPD and controls, and explored the relationships with structural and physiological MRI brain neurovascular measures...
February 10, 2018: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/29438037/tau-negative-amnestic-dementia-masquerading-as-alzheimer-disease-dementia
#2
Hugo Botha, William G Mantyh, Jonathan Graff-Radford, Mary M Machulda, Scott A Przybelski, Heather J Wiste, Matthew L Senjem, Joseph E Parisi, Ronald C Petersen, Melissa E Murray, Bradley F Boeve, Val J Lowe, David S Knopman, Clifford R Jack, David T Jones
OBJECTIVE: To describe the phenomenon of tau-negative amnestic dementia mimicking Alzheimer disease (AD) clinically and radiologically and to highlight the importance of biomarkers in AD research. METHODS: Eight participants with amnestic mild cognitive impairment or AD dementia were evaluated by a behavioral neurologist and had a standardized neuropsychological battery performed. All participants completed structural (MRI) and molecular (amyloid and tau PET) imaging...
February 7, 2018: Neurology
https://www.readbyqxmd.com/read/29429985/posterior-associative-and-cingulate-cortex-involvement-of-brain-single-photon-emission-computed-tomography-spect-imaging-in-semantic-dementia-with-probable-alzheimer-disease-pathology-a-case-report
#3
Yumi Takano, Keiko Kunitoki, Yasuko Tatewaki, Tatsushi Mutoh, Tomoko Totsune, Hideo Shimomura, Manabu Nakagawa, Hiroyuki Arai, Yasuyuki Taki
BACKGROUND Semantic dementia (SD) is a type of primary progressive aphasia with prominent language dysfunction, mostly within the spectrum of frontotemporal lobar degeneration (FTLD). Although there is an overlap in clinical manifestations of SD attributable to FTLD and neuropathologically proven Alzheimer disease (AD), clinical diagnostic clues are not readily available. We present a characteristic finding based on a single-photon emission computed tomography (SPECT)-based regional cerebral blood flow study and its statistical imaging analysis for a rare case of SD with AD-like pathology...
February 12, 2018: American Journal of Case Reports
https://www.readbyqxmd.com/read/29419659/validation-of-prognostic-biomarker-scores-for-predicting-progression-of-dementia-in-patients-with-amnestic-mild-cognitive-impairment
#4
Jamie Moreland, Timo Urhemaa, Mark van Gils, Jyrki Lötjönen, Jan Wolber, Christopher J Buckley
OBJECTIVE: The objective of this study was to develop and validate a practical computerized prognostic model that uses baseline psychometric and imaging data, including results of PET imaging of amyloid deposition, to predict the progression to dementia in patients at risk for Alzheimer's disease (AD). PATIENTS AND METHODS: Data from patients in a phase II trial of [F]flutemetamol for PET imaging of brain amyloid and from the Alzheimer's Disease Neuroimaging Initiative were used to train the prognostic model to yield a disease state index (DSI), a measure of the similarity of an individual patient's data to data from patients in specific diagnostic groups...
February 6, 2018: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/29410622/serum-hepatocyte-growth-factor-is-associated-with-small-vessel-disease-in-alzheimer-s-dementia
#5
Yanan Zhu, Saima Hilal, Yuek L Chai, M K Ikram, Narayanaswamy Venketasubramanian, Christopher P Chen, Mitchell K P Lai
Background: While hepatocyte growth factor (HGF) is known to exert cell growth, migration and morphogenic effects in various organs, recent studies suggest that HGF may also play a role in synaptic maintenance and cerebrovascular integrity. Although increased levels of HGF have been reported in brain and cerebrospinal fluid (CSF) samples of patients with Alzheimer's disease (AD), it is unclear whether peripheral HGF may be associated with cerebrovascular disease (CeVD) and dementia. In this study, we examined the association of baseline serum HGF with neuroimaging markers of CeVD in a cohort of pre-dementia (cognitive impaired no dementia, CIND) and AD patients...
2018: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/29406924/white-matter-hyperintensities-on-mri-in-dementia-with-lewy-bodies-parkinson-s-disease-with-dementia-and-alzheimer-s-disease
#6
Hideto Joki, Yuichi Higashiyama, Yoshiharu Nakae, Chiharu Kugimoto, Hiroshi Doi, Katsuo Kimura, Hitaru Kishida, Naohisa Ueda, Tatsu Nakano, Tatsuya Takahashi, Shigeru Koyano, Hideyuki Takeuchi, Fumiaki Tanaka
BACKGROUND: In dementia with Lewy bodies (DLB) and Parkinson's disease with dementia (PDD), it is still debated whether white matter hyperintensities (WMH) on MRI reflect atherosclerotic cerebrovascular changes or Alzheimer's disease (AD)-related pathology such as cerebral amyloid angiopathy. To examine AD-related pathology in DLB and PDD, we compared the severity of WMH and medial temporal lobe atrophy among patients with DLB, PDD, non-demented PD (PDND), and AD. METHODS: We retrospectively studied sex- and age-matched outpatients with AD, DLB, PDD, and PDND, as well as subjects without central nervous system disorders as normal controls (n=50 each)...
February 15, 2018: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/29399090/report-and-literature-review-on-two-cases-with-different-kinds-of-creutzfeldt-jakob-disease
#7
Chunhua Tang, Changyue Gao
Creutzfeldt-Jakob disease (CJD), also known as corticostriate spinal degeneration, subacute spongiform encephalopathy or infectious spongiform encephalopathy, is a type of degenerative disease of the central nervous system caused by prion protein (PrP) infection, which is the most common type of human PrP disease. CJD is genetic and infectious, and is one of the most common causes of rapid progressive dementia with rare clinical occurrence. Herein, we report the clinical conditions of 2 cases of patients with different type of CJD we treated and followed up recently, and a review of relevant literature...
January 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29398961/comparison-of-standardized-uptake-value-ratio-calculations-in-amyloid-positron-emission-tomography-brain-imaging
#8
Karin Knešaurek, Geoffrey Warnock, Lale Kostakoglu, Cyrill Burger
Amyloid positron emission tomography (PET) imaging with florbetapir 18F (18F-AV-45) allows in vivo assessment of cerebral amyloid load and can be used in the evaluation of progression of Alzheimer's disease (AD) and other dementias associated with b-amyloid. However, cortical amyloid deposition can occur in healthy cases, as well as in patients with AD and quantification of cortical amyloid burden can improve the 18F-AV-45 PET imaging evaluations. The quantification is mostly performed by cortical-to-cerebellum standardized uptake value ratio (SUVr)...
January 2018: World Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/29397305/spatial-patterns-of-neuroimaging-biomarker-change-in-individuals-from-families-with-autosomal-dominant-alzheimer-s-disease-a-longitudinal-study
#9
Brian A Gordon, Tyler M Blazey, Yi Su, Amrita Hari-Raj, Aylin Dincer, Shaney Flores, Jon Christensen, Eric McDade, Guoqiao Wang, Chengjie Xiong, Nigel J Cairns, Jason Hassenstab, Daniel S Marcus, Anne M Fagan, Clifford R Jack, Russ C Hornbeck, Katrina L Paumier, Beau M Ances, Sarah B Berman, Adam M Brickman, David M Cash, Jasmeer P Chhatwal, Stephen Correia, Stefan Förster, Nick C Fox, Neill R Graff-Radford, Christian la Fougère, Johannes Levin, Colin L Masters, Martin N Rossor, Stephen Salloway, Andrew J Saykin, Peter R Schofield, Paul M Thompson, Michael M Weiner, David M Holtzman, Marcus E Raichle, John C Morris, Randall J Bateman, Tammie L S Benzinger
BACKGROUND: Models of Alzheimer's disease propose a sequence of amyloid β (Aβ) accumulation, hypometabolism, and structural decline that precedes the onset of clinical dementia. These pathological features evolve both temporally and spatially in the brain. In this study, we aimed to characterise where in the brain and when in the course of the disease neuroimaging biomarkers become abnormal. METHODS: Between Jan 1, 2009, and Dec 31, 2015, we analysed data from mutation non-carriers, asymptomatic carriers, and symptomatic carriers from families carrying gene mutations in presenilin 1 (PSEN1), presenilin 2 (PSEN2), or amyloid precursor protein (APP) enrolled in the Dominantly Inherited Alzheimer's Network...
January 31, 2018: Lancet Neurology
https://www.readbyqxmd.com/read/29391404/perivascular-spaces-segmentation-in-brain-mri-using-optimal-3d-filtering
#10
Lucia Ballerini, Ruggiero Lovreglio, Maria Del C Valdés Hernández, Joel Ramirez, Bradley J MacIntosh, Sandra E Black, Joanna M Wardlaw
Perivascular Spaces (PVS) are a feature of Small Vessel Disease (SVD), and are an important part of the brain's circulation and glymphatic drainage system. Quantitative analysis of PVS on Magnetic Resonance Images (MRI) is important for understanding their relationship with neurological diseases. In this work, we propose a segmentation technique based on the 3D Frangi filtering for extraction of PVS from MRI. We used ordered logit models and visual rating scales as alternative ground truth for Frangi filter parameter optimization and evaluation...
February 1, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29381739/impaired-memory-is-more-closely-associated-with-brain-beta-amyloid-than-leukoaraiosis-in-hypertensive-patients-with-cognitive-symptoms
#11
Eric E Smith, Alona Muzikansky, Cheryl R McCreary, Saima Batool, Anand Viswanathan, Bradford C Dickerson, Keith Johnson, Steven M Greenberg, Deborah Blacker
BACKGROUND: Hypertension is the strongest modifiable risk factor for subcortical ischemic changes and is also a risk factor for Alzheimer's dementia. We used neuroimaging to investigate the pathological basis of early cognitive symptoms in patients with hypertension. METHODS: In this cross-sectional cohort study 67 patients age >60 years with hypertension and Clinical Dementia Rating scale score of 0.5 without dementia, and without history of symptomatic stroke, underwent MRI for measurement of subcortical vascular changes and positron emission tomography (PET) scan with Pittsburgh Compound B (PiB-PET) to detect beta-amyloid deposition...
2018: PloS One
https://www.readbyqxmd.com/read/29378218/ensemble-support-vector-machine-classification-of-dementia-using-structural-mri-and-mini-mental-state-examination
#12
Lauge Sørensen, Mads Nielsen
BACKGROUND: The International Challenge for Automated Prediction of MCI from MRI Data offered independent, standardized comparison of machine learning algorithms for multi-class classification of normal control (NC), mild cognitive impairment (MCI), converting MCI (cMCI), and Alzheimer's disease (AD) using brain imaging and general cognition. NEW METHOD: We proposed to use an ensemble of support vector machines (SVMs) that combined bagging without replacement and feature selection...
January 26, 2018: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/29376875/white-matter-hyperintensity-predicts-the-risk-of-incident-cognitive-decline-in-community-dwelling-elderly
#13
Ding Ding, Yunyun Xiong, Qianhua Zhao, Qihao Guo, Shuguang Chu, Winnie W C Chu, Jianfeng Luo, Xiaoniu Liang, Li Zheng, Zhen Hong, Lawrence K S Wong, Vincent C T Mok
BACKGROUND: Unlike western countries, data on white matter hyperintensity (WMH) in community dwelling elderly in Asian population is very limited. OBJECTIVE: To examine the relation between baseline WMH burden and the risk of incident cognitive decline in a community-based cohort with Chinese-dwelling elderly. METHODS: We prospectively evaluated the incident cognitive decline for 226 participants in the Shanghai Aging Study. Baseline WMH severity was visually rated by the age-related white matter changes (ARWMC) scale based on MRI...
2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29376149/feature-learning-and-fusion-of-multimodality-neuroimaging-and-genetic-data-for-multi-status-dementia-diagnosis
#14
Tao Zhou, Kim-Han Thung, Xiaofeng Zhu, Dinggang Shen
In this paper, we aim to maximally utilize multimodality neuroimaging and genetic data to predict Alzheimer's disease (AD) and its prodromal status, i.e., a multi-status dementia diagnosis problem. Multimodality neuroimaging data such as MRI and PET provide valuable insights to abnormalities, and genetic data such as Single Nucleotide Polymorphism (SNP) provide information about a patient's AD risk factors. When used in conjunction, AD diagnosis may be improved. However, these data are heterogeneous (e.g., having different data distributions), and have different number of samples (e...
September 2017: Machine Learning in Medical Imaging
https://www.readbyqxmd.com/read/29374101/the-effect-of-white-matter-hyperintensities-on-verbal-memory-mediation-by-temporal-lobe-atrophy
#15
Walter Swardfager, Hugo Cogo-Moreira, Mario Masellis, Joel Ramirez, Nathan Herrmann, Jodi D Edwards, Mahwesh Saleem, Parco Chan, Di Yu, Sean M Nestor, Christopher J M Scott, Melissa F Holmes, Demetrios J Sahlas, Alexander Kiss, Paul I Oh, Stephen C Strother, Fuqiang Gao, Bojana Stefanovic, Julia Keith, Sean Symons, Richard H Swartz, Krista L Lanctôt, Donald T Stuss, Sandra E Black
OBJECTIVE: To determine the relationship between white matter hyperintensities (WMH) presumed to indicate disease of the cerebral small vessels, temporal lobe atrophy, and verbal memory deficits in Alzheimer disease (AD) and other dementias. METHODS: We recruited groups of participants with and without AD, including strata with extensive WMH and minimal WMH, into a cross-sectional proof-of-principle study (n = 118). A consecutive case series from a memory clinic was used as an independent validation sample (n = 702; Sunnybrook Dementia Study; NCT01800214)...
January 26, 2018: Neurology
https://www.readbyqxmd.com/read/29369733/clinical-applications-of-ultra-high-field-magnetic-resonance-imaging-in-multiple-sclerosis
#16
Matilde Inglese, Lazar Fleysher, Niels Oesingmann, Maria Petracca
Magnetic resonance imaging (MRI) is of paramount importance for the early diagnosis of multiple sclerosis (MS) and MRI findings are part of the MS diagnostic criteria. There is a growing interest in the use of ultra-high-field strength -7 Tesla- (7T) MRI to investigate, in vivo, the pathological substrate of the disease. Areas covered: An overview of 7T MRI applications in MS focusing on increased sensitivity for lesion detection, specificity of the central vein sign and better understanding of MS pathophysiology and discuss the implications for disease diagnosis, monitoring and treatment planning...
January 25, 2018: Expert Review of Neurotherapeutics
https://www.readbyqxmd.com/read/29361626/-secondary-dementia-due-to-leptomeningeal-metastasis-of-breast-cancer-improved-by-whole-brain-radiation
#17
Mariko Asai, Hiroshi Tanaka, Yasutomo Goto, Tetsuya Yamada, Norihiro Yuasa, Eiji Takeuchi, Hideo Miyake, Hidemasa Nagai, Yuichiro Yoshioka, Masataka Okuno, Natsuko Kawai, Takayuki Minami, Takuya Nagao, Shingo Maeda, Koichi Mouri, Kouji Fukata, Hironori Mizuno, Takuji Iwase, Kanji Miyata
A 62-year-old woman received chemotherapy for breast cancer with bone metastasis and malignant pleural and pericardial effusion. She was examined by imaging for progressive cognitive impairment and headache. Enhanced MRI findings showed multiple solid tumors on brain surface, and brain perfusion scintigraphy showed blood flow decrease in both parietal lobes. She was diagnosed with secondary dementia due to leptomeningeal metastases of breast cancer, and whole brain external irradiation was performed(30 Gy/15 Fr)...
December 2017: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/29357798/vascular-risk-factors-vascular-diseases-and-imaging-findings-in-a-hospital-based-cohort-of-mild-cognitive-impairment-types
#18
Cecilia Camarda, Carmela Pipia, Delia Azzarello, Iacopo Battaglini, Giovanni Romeo, Marcello Chiodi, Rosolino Camarda
BACKGROUND: Mild Cognitive Impairment (MCI) is a transitional state between normal cognition and dementia. OBJECTIVE: The aim of this study is to investigate the role of vascular risk factors, vascular diseases, cerebrovascular disease and brain atrophy in a large hospital-based cohort of MCI types including 471 amnestic MCI (a-MCI), 693 amnestic MCI multiple domain (a-MCImd), 322 single non-memory MCI (snm-MCI), and 202 non amnestic MCI multiple domain (na-MCImd)...
January 18, 2018: Current Alzheimer Research
https://www.readbyqxmd.com/read/29354223/increased-csf-levels-of-total-tau-in-patients-with-subcortical-cerebrovascular-pathology-and-cognitive-impairment
#19
Márcia Radanovic, Florindo Stella, Lis Gomes Silva, Leda L Talib, Orestes V Forlenza
Cognitive impairment includes mild cognitive decline and dementia, such as Alzheimer's disease (AD) and cerebrovascular-related pathologies. Objective: To investigate the profile of AD-related CSF biomarkers in a sample of cognitively impaired and unimpaired older adults with concomitant subcortical cerebrovascular burden. Methods: Seventy-eight older adults attending an outpatient psychogeriatric clinic were enrolled. Diagnoses were based on clinical, neuropsychological, laboratory, and neuroimaging data...
October 2017: Dementia & Neuropsychologia
https://www.readbyqxmd.com/read/29354214/a-panel-of-clinical-and-neuropathological-features-of-cerebrovascular-disease-through-the-novel-neuroimaging-methods
#20
Gilberto Sousa Alves, Luiza de Amorim de Carvalho, Felipe Kenji Sudo, Lucas Briand, Jerson Laks, Eliasz Engelhardt
The last decade has witnessed substantial progress in acquiring diagnostic biomarkers for the diagnostic workup of cerebrovascular disease (CVD). Advanced neuroimaging methods not only provide a strategic contribution for the differential diagnosis of vascular dementia (VaD) and vascular cognitive impairment (VCI), but also help elucidate the pathophysiological mechanisms ultimately leading to small vessel disease (SVD) throughout its course. Objective: In this review, the novel imaging methods, both structural and metabolic, were summarized and their impact on the diagnostic workup of age-related CVD was analysed...
October 2017: Dementia & Neuropsychologia
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