keyword
MENU ▼
Read by QxMD icon Read
search

alzheimer's disease AND imaging

keyword
https://www.readbyqxmd.com/read/28647411/hippocampal-5-ht1a-receptor-expression-changes-in-prodromal-stages-of-alzheimer-s-disease-beneficial-or-deleterious
#1
REVIEW
M Verdurand, L Zimmer
There is increasing evidence that the serotonergic system is highly dysfunctional in Alzheimer's disease (AD), and this could be related to cognitive impairments associated with dementia. Of the various serotonin receptors, 5-HT1A receptors are relevant to AD as they are highly expressed in the human hippocampus and are known to be involved in the regulation of memory processes. This review will discuss the involvement of 5-HT1A receptors in AD at several levels (post-mortem, in-vivo imaging, animal models)...
June 21, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28645685/concordance-between-brain-18-f-fdg-pet-and-cerebrospinal-fluid-biomarkers-in-diagnosing-alzheimer-s-disease
#2
S Rubí, A Noguera, S Tarongí, M Oporto, A García, H Vico, A Espino, M J Picado, A Mas, C Peña, G Amer
OBJECTIVES: Cortical posterior hypometabolism on PET imaging with (18)F-FDG (FDG-PET), and altered levels of Aß1-42 peptide, total Tau (tTau) and phosphorylated Tau (pTau) proteins in cerebrospinal fluid (CSF) are established diagnostic biomarkers in Alzheimer's disease (AD). An evaluation has been made of the concordance and relationship between the results of FDG-PET and CSF biomarkers in symptomatic patients with suspected AD. MATERIAL AND METHODS: A retrospective review was carried out on 120 patients with cognitive impairment referred to our Cognitive Neurology Unit, and who were evaluated by brain FDG-PET and a lumbar puncture for CSF biomarkers...
June 20, 2017: Revista Española de Medicina Nuclear e Imagen Molecular
https://www.readbyqxmd.com/read/28644998/olfactory-identification-deficit-predicts-white-matter-tract-impairment-in-alzheimer-s-disease
#3
Matthew R Woodward, Michael G Dwyer, Niels Bergsland, Jesper Hagemeier, Robert Zivadinov, Ralph Hb Benedict, Kinga Szigeti
Olfactory identification deficit (OID) has been associated with both aging and Alzheimer's disease (AD). In the context of an amnestic disorders, OID predicts conversion to AD. Neuroanatomical correlates could increase specificity and sensitivity and elucidate the mechanistic differences between OID in AD and aging. Cross-sectional analysis of white matter microstructural changes was performed using diffusion tensor imaging (DTI) and tract-based-spatial-statistics in amnestic mild cognitive impairment (aMCI), AD and normal controls (NC) in 66 subjects (26 AD, 15 aMCI, 25 NC)...
June 9, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28643852/therapeutic-d2-3-receptor-occupancies-and-response-with-low-amisulpride-blood-concentrations-in-very-late-onset-schizophrenia-like-psychosis-vloslp
#4
Suzanne Reeves, Kate Eggleston, Elizabeth Cort, Emma McLachlan, Stuart Brownings, Akshay Nair, Suki Greaves, Alan Smith, Joel Dunn, Paul Marsden, Robert Kessler, David Taylor, Julie Bertrand, Robert Howard
OBJECTIVE: Antipsychotic drug sensitivity in very late-onset schizophrenia-like psychosis (VLOSLP) is well documented, but poorly understood. This study aimed to investigate blood drug concentration, D2/3 receptor occupancy and outcome in VLOSLP during open amisulpride prescribing, and compare this with Alzheimer's disease (AD). METHODS: Blood drug concentration, prolactin, symptoms and extrapyramidal side-effects (EPS) were serially assessed during dose titration...
June 23, 2017: International Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/28643043/-18-f-florbetaben-pet-beta-amyloid-binding-expressed-in-centiloids
#5
Christopher C Rowe, Vincent Doré, Gareth Jones, David Baxendale, Rachel S Mulligan, Santiago Bullich, Andrew W Stephens, Susan De Santi, Colin L Masters, Ludger Dinkelborg, Victor L Villemagne
PURPOSE: The Centiloid (CL) method enables quantitative values from Aβ-amyloid (Aβ) imaging to be expressed in a universal unit providing pathological, diagnostic and prognostic thresholds in clinical practice and research and allowing integration of multiple tracers and methods. The method was developed for (11)C-PiB scans with zero CL set as the average in young normal subjects and 100 CL the average in subjects with mild Alzheimer's disease (AD). The method allows derivation of equations to convert the uptake value of any tracer into the same standard CL units but first requires head-to-head comparison with (11)C-PiB results...
June 22, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28642699/cerebral-blood-flow-and-amyloid-%C3%AE-interact-to-affect-memory-performance-in-cognitively-normal-older-adults
#6
Katherine J Bangen, Alexandra L Clark, Emily C Edmonds, Nicole D Evangelista, Madeleine L Werhane, Kelsey R Thomas, Lyzette E Locano, My Tran, Zvinka Z Zlatar, Daniel A Nation, Mark W Bondi, Lisa Delano-Wood
Cerebral blood flow (CBF) alterations and amyloid-β (Aβ) accumulation have been independently linked to cognitive deficits in older adults at risk for dementia. Less is known about how CBF and Aβ may interact to affect cognition in cognitively normal older adults. Therefore, we examined potential statistical interactions between CBF and Aβ status in regions typically affected in Alzheimer's disease (AD) within a sample of older adults from the Alzheimer's Disease Neuroimaging Initiative (ADNI) study. Sixty-two cognitively normal participants (mean age = 72 years) underwent neuroimaging and memory testing...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28641921/genome-wide-association-and-interaction-studies-of-csf-t-tau-a%C3%AE-42-ratio-in-adni-cohort
#7
Jin Li, Qiushi Zhang, Feng Chen, Xianglian Meng, Wenjie Liu, Dandan Chen, Jingwen Yan, Sungeun Kim, Lei Wang, Weixing Feng, Andrew J Saykin, Hong Liang, Li Shen
The pathogenic relevance in Alzheimer's disease (AD) presents a decrease of cerebrospinal fluid amyloid-ß42 (Aß42) burden and an increase in cerebrospinal fluid total tau (T-tau) levels. In this work, we performed genome-wide association study (GWAS) and genome-wide interaction study of T-tau/Aß42 ratio as an AD imaging quantitative trait on 843 subjects and 563,980 single-nucleotide polymorphisms (SNPs) in ADNI cohort. We aim to identify not only SNPs with significant main effects but also SNPs with interaction effects to help explain "missing heritability"...
May 15, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28640657/retinal-findings-on-oct-in-systemic-conditions
#8
Preeti Patil Chhablani, Vikas Ambiya, Akshay G Nair, Sailaja Bondalapati, Jay Chhablani
PURPOSE: Imaging technology has advanced by leaps and bounds in the recent past and has resulted in a much greater understanding of ocular diseases. The aim of this review article is to summarize optical coherence tomography (OCT) findings of various systemic conditions. METHOD: A systematic literature search of the Medline/PubMed database was performed. English articles up to April 2015 were included. Terms used for search included: Alzheimer's Disease; Multiple Sclerosis; Parkinson's Disease; Behçet's Disease; Schizophrenia; Migraine; Obstructive Sleep Apnea Syndrome; Neurofibromatosis; Sickle Cell Disease; Renal diseases; Lupus Retinopathy; Valsalva Retinopathy; Whiplash Retinopathy; Shaken-Baby Syndrome; Choroidal metastases; Intracranial Hypertension; Drug toxicity; Deferoxamine; Sildenafil; Tamoxifen; Hydroxychloroquine; Chloroquine; Ethambutol; Lead; Sickle Cell Disease; and Thalassemia along with OCT...
June 22, 2017: Seminars in Ophthalmology
https://www.readbyqxmd.com/read/28639126/a-comparison-of-five-partial-volume-correction-methods-for-tau-and-amyloid-pet-imaging-with-18-f-thk5351-and-11-c-pib
#9
Miho Shidahara, Benjamin A Thomas, Nobuyuki Okamura, Masanobu Ibaraki, Keisuke Matsubara, Senri Oyama, Yoichi Ishikawa, Shoichi Watanuki, Ren Iwata, Shozo Furumoto, Manabu Tashiro, Kazuhiko Yanai, Kohsuke Gonda, Hiroshi Watabe
PURPOSE: To suppress partial volume effect (PVE) in brain PET, there have been many algorithms proposed. However, each methodology has different property due to its assumption and algorithms. Our aim of this study was to investigate the difference among partial volume correction (PVC) method for tau and amyloid PET study. METHODS: We investigated two of the most commonly used PVC methods, Müller-Gärtner (MG) and geometric transfer matrix (GTM) and also other three methods for clinical tau and amyloid PET imaging...
June 21, 2017: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/28638497/fiber-direction-estimation-smoothing-and-tracking-in-diffusion-mri
#10
Raymond K W Wong, Thomas C M Lee, Debashis Paul, Jie Peng
Diffusion magnetic resonance imaging is an imaging technology designed to probe anatomical architectures of biological samples in an in vivo and noninvasive manner through measuring water diffusion. The contribution of this paper is threefold. First, it proposes a new method to identify and estimate multiple diffusion directions within a voxel through a new and identifiable parametrization of the widely used multi-tensor model. Unlike many existing methods, this method focuses on the estimation of diffusion directions rather than the diffusion tensors...
September 2016: Annals of Applied Statistics
https://www.readbyqxmd.com/read/28637402/antioxidant-skq1-alleviates-signs-of-alzheimer-s-disease-like-pathology-in-old-oxys-rats-by-reversing-mitochondrial-deterioration
#11
Nataliya G Kolosova, Mikhail A Tyumentsev, Natalia A Muraleva, Elena Kiseleva, Anton O Vitovtov, Natalia A Stefanova
BACKGROUND: Mitochondrial dysfunction is called the missing link between brain aging and Alzheimer's disease (AD), the most common type of age-related dementia worldwide. Among the most advanced and promising of approaches to prevention or slowing of AD are therapeutic strategies targeting mitochondria. OBJECTIVE: Mitochondria-targeted antioxidant SkQ1 can suppress the development of AD signs, but its therapeutic potential in AD at clinical stages is currently unknown...
June 21, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28635419/multimodal-imaging-gd-nanoparticles-functionalized-with-pittsburgh-compound-b-or-a-nanobody-for-amyloid-plaques-targeting
#12
Jonathan Pansieri, Marie Plissonneau, Nathalie Stransky-Heilkron, Mireille Dumoulin, Laurence Heinrich-Balard, Pascaline Rivory, Jean-François Morfin, Eva Toth, Maria Joao Saraiva, Eric Allémann, Olivier Tillement, Vincent Forge, François Lux, Christel Marquette
AIM: Gadolinium-based nanoparticles were functionalized with either the Pittsburgh compound B or a nanobody (B10AP) in order to create multimodal tools for an early diagnosis of amyloidoses. MATERIALS & METHODS: The ability of the functionalized nanoparticles to target amyloid fibrils made of β-amyloid peptide, amylin or Val30Met-mutated transthyretin formed in vitro or from pathological tissues was investigated by a range of spectroscopic and biophysics techniques including fluorescence microscopy...
June 21, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28634451/berberine-ameliorates-diabetes-associated-cognitive-decline-through-modulation-of-aberrant-inflammation-response-and-insulin-signaling-pathway-in-dm-rats
#13
Qingjie Chen, Ran Mo, Ninghua Wu, Xin Zou, Cai Shi, Jing Gong, Jingbin Li, Ke Fang, Dingkun Wang, Deshen Yang, Kaifu Wang, Juan Chen
Background: Memory-impairment was one of the common characteristics in patients with diabetes mellitus. The release of chronic inflammation mediators and insulin resistance in diabetic brain gave rise to the generation of toxic factor Aβ42 which was the marker of Alzheimer's disease. In addition, the impairment of memory in diabetes mellitus was also correlated predominantly with uptake/metabolism of glucose in medial prefrontal cortex (mPFC). Previously, anti-inflammation and hypoglycemic effects of berberine (BBr) have been described in peripheral tissues...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28632523/frontotemporal-dementia-presenting-as-gambling-disorder-when-a-psychiatric-condition-is-the-clue-to-a-neurodegenerative-disease
#14
Giacomo Tondo, Fabiola De Marchi, Emanuela Terazzi, Marta Sacchetti, Roberto Cantello
Behavioral variant frontotemporal dementia, the most common form of frontotemporal dementia, is characterized by executive dysfunction and changes in personality and behavior, sometimes with associated psychiatric disorders. We report a man who suddenly developed a gambling disorder when he was 55 years old. A year later he developed personality changes of agitation, euphoria, and disinhibition, along with binge eating and dysthymia. He did not improve on paroxetine 40 mg/day. Two years after the onset of his symptoms, he came to our clinic for evaluation...
June 2017: Cognitive and Behavioral Neurology: Official Journal of the Society for Behavioral and Cognitive Neurology
https://www.readbyqxmd.com/read/28631336/a-neuroimaging-approach-to-capture-cognitive-reserve-application-to-alzheimer-s-disease
#15
Anna C van Loenhoud, Alle Meije Wink, Colin Groot, Sander C J Verfaillie, Jos Twisk, Frederik Barkhof, Bart van Berckel, Philip Scheltens, Wiesje M van der Flier, Rik Ossenkoppele
Cognitive reserve (CR) explains interindividual differences in the ability to maintain cognitive function in the presence of neuropathology. We developed a neuroimaging approach including a measure of brain atrophy and cognition to capture this construct. In a group of 511 Alzheimer's disease (AD) biomarker-positive subjects in different stages across the disease spectrum, we performed 3T magnetic resonance imaging and predicted gray matter (GM) volume in each voxel based on cognitive performance (i.e. a global cognitive composite score), adjusted for age, sex, disease stage, premorbid brain size (i...
June 20, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28630885/bayesian-framework-inspired-no-reference-region-of-interest-quality-measure-for-brain-mri-images
#16
Michael Osadebey, Marius Pedersen, Douglas Arnold, Katrina Wendel-Mitoraj
We describe a postacquisition, attribute-based quality assessment method for brain magnetic resonance imaging (MRI) images. It is based on the application of Bayes theory to the relationship between entropy and image quality attributes. The entropy feature image of a slice is segmented into low- and high-entropy regions. For each entropy region, there are three separate observations of contrast, standard deviation, and sharpness quality attributes. A quality index for a quality attribute is the posterior probability of an entropy region given any corresponding region in a feature image where quality attribute is observed...
April 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28630235/ultrasound-markers-of-carotid-atherosclerosis-and-cognition-the-northern-manhattan-study
#17
Hannah Gardener, Michelle R Caunca, Chuanhui Dong, Ying Kuen Cheung, Mitchell S V Elkind, Ralph L Sacco, Tatjana Rundek, Clinton B Wright
BACKGROUND AND PURPOSE: Ultrasound markers of carotid atherosclerosis may be related to cognitive status. We hypothesized that individuals with greater carotid intima-media thickness (cIMT) and carotid plaque burden would exhibit worse cognition. METHODS: One thousand one hundred sixty-six stroke-free participants from the NOMAS (Northern Manhattan Study) underwent carotid ultrasound and neuropsychological examination. Among them, 826 underwent a second neuropsychological examination an average of 5 years later...
June 19, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28625273/development-of-a-core-outcome-set-for-disease-modification-trials-in-mild-to-moderate-dementia-a-systematic-review-patient-and-public-consultation-and-consensus-recommendations
#18
Lucy Webster, Derek Groskreutz, Anna Grinbergs-Saull, Rob Howard, John T O'Brien, Gail Mountain, Sube Banerjee, Bob Woods, Robert Perneczky, Louise Lafortune, Charlotte Roberts, Jenny McCleery, James Pickett, Frances Bunn, David Challis, Georgina Charlesworth, Katie Featherstone, Chris Fox, Claire Goodman, Roy Jones, Sallie Lamb, Esme Moniz-Cook, Justine Schneider, Sasha Shepperd, Claire Surr, Jo Thompson-Coon, Clive Ballard, Carol Brayne, Orlaith Burke, Alistair Burns, Linda Clare, Peter Garrard, Patrick Kehoe, Peter Passmore, Clive Holmes, Ian Maidment, Fliss Murtagh, Louise Robinson, Gill Livingston
BACKGROUND: There is currently no disease-modifying treatment available to halt or delay the progression of the disease pathology in dementia. An agreed core set of the best-available and most appropriate outcomes for disease modification would facilitate the design of trials and ensure consistency across disease modification trials, as well as making results comparable and meta-analysable in future trials. OBJECTIVES: To agree a set of core outcomes for disease modification trials for mild to moderate dementia with the UK dementia research community and patient and public involvement (PPI)...
May 2017: Health Technology Assessment: HTA
https://www.readbyqxmd.com/read/28622527/alzheimer-s-disease-the-state-of-the-art-in-resting-state-magnetoencephalography
#19
REVIEW
M M A Engels, W M van der Flier, C J Stam, A Hillebrand, Ph Scheltens, E C W van Straaten
Alzheimer's disease (AD) is accompanied by functional brain changes that can be detected in imaging studies, including electromagnetic activity recorded with magnetoencephalography (MEG). Here, we systematically review the studies that have examined resting-state MEG changes in AD and identify areas that lack scientific or clinical progress. Three levels of MEG analysis will be covered: (i) single-channel signal analysis, (ii) pairwise analyses over time series, which includes the study of interdependencies between two time series and (iii) global network analyses...
May 21, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28622141/analysis-of-structural-brain-mri-and-multi-parameter-classification-for-alzheimer-s-disease
#20
Yingteng Zhang, Shenquan Liu
Incorporating with machine learning technology, neuroimaging markers which extracted from structural Magnetic Resonance Images (sMRI), can help distinguish Alzheimer's Disease (AD) patients from Healthy Controls (HC). In the present study, we aim to investigate differences in atrophic regions between HC and AD and apply machine learning methods to classify these two groups. T1-weighted sMRI scans of 158 patients with AD and 145 age-matched HC were acquired from the ADNI database. Five kinds of parameters (i...
June 15, 2017: Biomedizinische Technik. Biomedical Engineering
keyword
keyword
63770
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"