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https://www.readbyqxmd.com/read/29164603/18f-pet-with-florbetapir-for-the-early-diagnosis-of-alzheimer-s-disease-dementia-and-other-dementias-in-people-with-mild-cognitive-impairment-mci
#1
REVIEW
Gabriel Martínez, Robin Wm Vernooij, Paulina Fuentes Padilla, Javier Zamora, Xavier Bonfill Cosp, Leon Flicker
BACKGROUND: (18)F-florbetapir uptake by brain tissue measured by positron emission tomography (PET) is accepted by regulatory agencies like the Food and Drug Administration (FDA) and the European Medicine Agencies (EMA) for assessing amyloid load in people with dementia. Its added value is mainly demonstrated by excluding Alzheimer's pathology in an established dementia diagnosis. However, the National Institute on Aging and Alzheimer's Association (NIA-AA) revised the diagnostic criteria for Alzheimer's disease and confidence in the diagnosis of mild cognitive impairment (MCI) due to Alzheimer's disease may be increased when using amyloid biomarkers tests like (18)F-florbetapir...
November 22, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29164602/18f-pet-with-flutemetamol-for-the-early-diagnosis-of-alzheimer-s-disease-dementia-and-other-dementias-in-people-with-mild-cognitive-impairment-mci
#2
REVIEW
Gabriel Martínez, Robin Wm Vernooij, Paulina Fuentes Padilla, Javier Zamora, Leon Flicker, Xavier Bonfill Cosp
BACKGROUND: (18)F-flutemetamol uptake by brain tissue, measured by positron emission tomography (PET), is accepted by regulatory agencies like the Food and Drug Administration (FDA) and the European Medicine Agencies (EMA) for assessing amyloid load in people with dementia. Its added value is mainly demonstrated by excluding Alzheimer's pathology in an established dementia diagnosis. However, the National Institute on Aging and Alzheimer's Association (NIA-AA) revised the diagnostic criteria for Alzheimer's disease and the confidence in the diagnosis of mild cognitive impairment (MCI) due to Alzheimer's disease may be increased when using some amyloid biomarkers tests like (18)F-flutemetamol...
November 22, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29164600/18f-pet-with-florbetaben-for-the-early-diagnosis-of-alzheimer-s-disease-dementia-and-other-dementias-in-people-with-mild-cognitive-impairment-mci
#3
REVIEW
Gabriel Martínez, Robin Wm Vernooij, Paulina Fuentes Padilla, Javier Zamora, Leon Flicker, Xavier Bonfill Cosp
BACKGROUND: (18)F-florbetaben uptake by brain tissue, measured by positron emission tomography (PET), is accepted by regulatory agencies like the Food and Drug Administration (FDA) and the European Medicine Agencies (EMA) for assessing amyloid load in people with dementia. Its added value is mainly demonstrated by excluding Alzheimer's pathology in an established dementia diagnosis. However, the National Institute on Aging and Alzheimer's Association (NIA-AA) revised the diagnostic criteria for Alzheimer's disease and confidence in the diagnosis of mild cognitive impairment (MCI) due to Alzheimer's disease may be increased when using some amyloid biomarkers tests like (18)F-florbetaben...
November 22, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29164280/functional-brain-networks-involved-in-decision-making-under-certain-and-uncertain-conditions
#4
Danielle C Farrar, Asim Z Mian, Andrew E Budson, Mark B Moss, Ronald J Killiany
PURPOSE: The aim of this study was to describe imaging markers of decision-making under uncertain conditions in normal individuals, in order to provide baseline activity to compare to impaired decision-making in pathological states. METHODS: In this cross-sectional study, 19 healthy subjects ages 18-35 completed a novel decision-making card-matching task using a Phillips T3 Scanner and a 32-channel head coil. Functional data were collected in six functional runs...
November 21, 2017: Neuroradiology
https://www.readbyqxmd.com/read/29164237/feasibility-study-of-the-3d-visualization-at-high-resolution-of-intra-cranial-rabbit-eyes-with-x-ray-ct-phase-contrast-imaging
#5
Yury Ivanishko, Alberto Bravin, Sergey Kovalev, Polina Lisutina, Mikhail Lotoshnikov, Alberto Mittone, Sergey Tkachev, Marina Tkacheva
Purpose: The intracranial three-dimensional (3D) visualization of the whole volume of the eyeball at micrometric resolution has not been achieved yet either in clinical nor in preclinical diagnostic research. Overcoming this limitation may provide a new tool for clinical and preclinical studies of different pathologies of the various sections of the eye. The aim of this work is to give the first insight of a volumetric visualization at the high resolution of the entire enucleated and intracranial postmortem rabbit eyeballs...
November 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29163922/bright-and-sensitive-ratiometric-fluorescent-probe-enabling-endogenous-fa-imaging-and-mechanistic-exploration-of-indirect-oxidative-damage-due-to-fa-in-various-living-systems
#6
Kun Dou, Guang Chen, Fabiao Yu, Yuxia Liu, Lingxin Chen, Ziping Cao, Tao Chen, Yulin Li, Jinmao You
As a notorious toxin, formaldehyde (FA) poses an immense threat to human health. Aberrantly elevated FA levels lead to serious pathologies, including organ damage, neurodegeneration, and cancer. Unfortunately, current techniques limit FA imaging to general comparative studies, instead of a mechanistic exploration of its biological role, and this is presumably due to the lack of robust molecular tools for reporting FA in living systems. More importantly, despite being reductive, FA, however, can induce oxidative damage to organisms, thus providing a challenge to the mechanistic study of FA using fluorescence imaging...
November 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/29163077/revisiting-vision-rehabilitation
#7
REVIEW
Claire Meyniel, Bahram Bodaghi, Pierre-Yves Robert
Low vision is a condition caused by eye or brain disease, in which visual acuity is 20/70 (3/10 or 6/18) or poorer in the better-seeing eye and cannot be corrected or improved with regular eyeglasses. It impacts personal ability to perform vision-dependent tasks as activities of daily living, walking, reading or using a computer. Rehabilitation is a multidisciplinary training dedicated to improve patients' functional abilities and quality of life. It has to be personalized to every individual situation, whatever the underlying pathology...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/29160952/transit-time-mapping-in-the-mouse-brain-using-time-encoded-pcasl
#8
Lydiane Hirschler, Leon P Munting, Artem Khmelinskii, Wouter M Teeuwisse, Ernst Suidgeest, Jan M Warnking, Louise van der Weerd, Emmanuel L Barbier, Matthias J P van Osch
The cerebral blood flow (CBF) is a potential biomarker for neurological disease. However, the arterial transit time (ATT) of the labeled blood is known to potentially affect CBF quantification. Furthermore, ATT could be an interesting biomarker in itself, as it may reflect underlying macro- and microvascular pathologies. Currently, no optimized magnetic resonance imaging (MRI) sequence exists to measure ATT in mice. Recently, time-encoded labeling schemes have been implemented in rats and humans, enabling ATT mapping with higher signal-to-noise ratio (SNR) and shorter scan time than multi-delay arterial spin labeling (ASL)...
November 21, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/29159779/simultaneous-whole-body-and-breast-18f-fdg-pet-mri-examinations-in-patients-with-breast-cancer-a-comparison-of-apparent-diffusion-coefficients-and-maximum-standardized-uptake-values
#9
Michiro Sasaki, Mitsuhiro Tozaki, Kazunori Kubota, Wakana Murakami, Daisuke Yotsumoto, Yasuaki Sagara, Yasuyo Ohi, Shunichi Oosako, Yoshiaki Sagara
PURPOSE: To compare standardized uptake value (SUV) and apparent diffusion coefficient (ADC) values acquired using a PET/MRI scanner in breast cancer patients. MATERIALS AND METHODS: Whole-body PET/MRI and breast PET/MRI were performed in 108 consecutive patients. Ninety-four patients who had a total of 100 breast cancers were analyzed. SUVmax and ADCmean acquired using breast PET/MRI were compared with pathologic prognostic factors. RESULTS: All the lesions were visually detectable using PET and diffusion-weighted imaging (DWI) on breast PET/MRI; however, lesions were visually undetectable on whole-body DWI in 13 patients (13%) or on whole-body PET in 7 patients (7%)...
November 20, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/29159053/using-simultaneous-pet-mri-to-compare-the-accuracy-of-diagnosing-frontotemporal-dementia-by-arterial-spin-labelling-mri-and-fdg-pet
#10
Udunna C Anazodo, Elizabeth Finger, Benjamin Yin Ming Kwan, William Pavlosky, James Claude Warrington, Matthias Günther, Frank S Prato, Jonathan D Thiessen, Keith S St Lawrence
Purpose: The clinical utility of FDG-PET in diagnosing frontotemporal dementia (FTD) has been well demonstrated over the past decades. On the contrary, the diagnostic value of arterial spin labelling (ASL) MRI - a relatively new technique - in clinical diagnosis of FTD has yet to be confirmed. Using simultaneous PET/MRI, we evaluated the diagnostic performance of ASL in identifying pathological abnormalities in FTD (FTD) to determine whether ASL can provide similar diagnostic value as FDG-PET...
2018: NeuroImage: Clinical
https://www.readbyqxmd.com/read/29155793/metabolic-support-of-excised-living-brain-tissues-during-magnetic-resonance-microscopy-acquisition
#11
Jeremy J Flint, Kannan Menon, Brian Hansen, John Forder, Stephen J Blackband
This protocol describes the procedures necessary to support normal metabolic functions of acute brain slice preparations during the collection of magnetic resonance (MR) microscopy data. While it is possible to perform MR collections on living, excised mammalian tissue, such experiments have traditionally been constrained by resolution limits and are thus incapable of visualizing tissue microstructure. Conversely, MR protocols that did achieve microscopic image resolution required the use of fixed samples to accommodate the need for static, unchanging conditions over lengthy scan times...
October 18, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29155265/neuroanatomical-distribution-and-function-of-the-vasopressin-v1b-receptor-in-the-rat-brain-deciphered-using-specific-fluorescent-ligands
#12
Maithé Corbani, Rafik Marir, Miguel Trueba, Magda Chafai, Anne Vincent, Amélie M Borie, Michel G Desarménien, Yoichi Ueta, Csaba Tomboly, Aleksandra Olma, Maurice Manning, Gilles Guillon
It is now accepted that vasopressin, through V1A/V1B receptors, centrally regulates cognitive functions such as memory, affiliation, stress, fear and depression. However, the respective roles of these receptor isoforms and their contribution to stress-related pathologies remain uncertain. The development of new therapeutic treatments requires a precise knowledge of the distribution of these receptors within the brain, which has been so far hampered by the lack of selective V1B markers. In the present study, we have determined the pharmacological properties of three new potent rat V1B fluorescent ligands and demonstrated that they constitute valuable tools for simultaneous visualization and activation of native V1B receptors in living rat brain tissue...
November 16, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29155252/3d-visualization-and-pathological-characteristics-of-cartilage-and-subchondral-bone-changes-in-the-lumbar-facet-joint-of-an-ovariectomized-mouse-model
#13
Chunyue Duan, Shuangfei Ni, Yong Cao, Shenghui Liao, Jianzhong Hu, Tianding Wu
BACKGROUD CONTEXT: Low back pain (LBP) is more prevalent among postmenopausal women than men. Ovariectomy (OVX) is an established animal model that mimics the estrogen deficiency of postmenopausal women. Little is known about the 3D morphological properties of cartilage and subchondral bone changes in the lumbar facet joint (LFJ) of an OVX mouse model. PURPOSE: The purpose of this study is to characterize the 3D morphological change of cartilage and subchondral bone in LFJ of an OVX mouse model...
November 15, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29154286/clinic-based-validation-of-cerebrospinal-fluid-biomarkers-with-florbetapir-pet-for-diagnosis-of-dementia
#14
Ignacio Álvarez, Miquel Aguilar, Jose Manuel González, Montse Ysamat, Carles Lorenzo-Bosquet, Alvaro Alonso, Juan Pablo Tartari, Silvia Romero, Monica Diez-Fairen, Maria Carcel, Francisco Pujalte, Pau Pastor
BACKGROUND: Cerebrospinal fluid (CSF) biomarker studies have shown variable accuracy for diagnosis of Alzheimer's disease (AD); therefore, internal validation is recommended. OBJECTIVE: To investigate the correlation between CSF biomarkers and cerebral 18-Florbetapir positron emission tomography (Amyloid-PET) and calculate their sensitivity and specificity to obtain the optimal clinical cut-off points to diagnose the etiology of cognitive impairment. METHODS: We performed Amyloid-PET scans and CSF biomarker levels analyses in 68 subjects (50 with mild cognitive impairment, 11 with AD dementia, and 7 with non-AD dementia)...
November 14, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29153364/application-of-arterial-spin-labeling-perfusion-mri-to-differentiate-benign-from-malignant-intracranial-meningiomas
#15
Xin J Qiao, Hyun Grace Kim, Danny J J Wang, Noriko Salamon, Michael Linetsky, Ali Sepahdari, Benjamin M Ellingson, Whitney B Pope
PURPOSE: Differentiating WHO grade I-III of meningioma by non-invasive imaging is challenging. This study investigated the potential of MR arterial spin labeling (ASL) to establish tumor grade in meningioma patients. MATERIAL AND METHODS: Pseudo-continuous ASL with 3D background suppressed gradient and spin echo (GRASE) was acquired on 54 patients with newly diagnosed or recurrent intracranial meningioma. Perfusion patterns characterized in CBF color maps were independently evaluated by three neuroradiologists blinded to patient history, and correlated with tumor grade from histo-pathological review...
December 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/29151112/phase-difference-enhanced-magnetic-resonance-mr-imaging-padre-technique-for-the-detection-of-age-related-microstructural-changes-in-optic-radiation-comparison-with-diffusion-tensor-imaging-dti
#16
Yasuko Tatewaki, Tatsushi Mutoh, Benjamin Thyreau, Kazuko Omodaka, Takaki Murata, Atsushi Sekiguchi, Toru Nakazawa, Yasuyuki Taki
BACKGROUND The optic radiation (OR) is a white-matter bundle connecting the lateral geniculate body and the visual cortex. Phase difference-enhanced imaging (PADRE) is a new MRI technique that is able to achieve precise delineation of the OR. The aim of this study was to investigate the effect of age on the volume and signal intensity of the OR using PADRE, and to establish a volumetric reference of the OR from a healthy population, compared with diffusion tensor imaging (DTI). MATERIAL AND METHODS Thirty-nine healthy volunteers underwent MR imaging with PADRE and DTI sequences on a 3...
November 19, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29150624/semiquantative-visual-assessment-of-sub-solid-pulmonary-nodules-%C3%A2-3%C3%A2-cm-in-differentiation-of-lung-adenocarcinoma-spectrum
#17
Fu-Zong Wu, Po-An Chen, Carol C Wu, Pei-Lun Kuo, Shu-Ping Tsao, Chu-Chun Chien, En-Kuei Tang, Ming-Ting Wu
We aimed to analyze CT features of persistent subsolid nodules (SSN) ≦3 cm diagnosed pathologically as adenocarcinoma spectrum to investigate whether parameters enable distinction between invasive pulmonary adenocarcinomas (IPAs) and pre-invasive lesions. A total of 129 patients with 141 SSNs confirmed with surgically pathologic proof were retrospectively reviewed. Of 141 SSNs, there were 57 pure ground-glass nodules (GGNs), 22 heterogeneous GGNs, and 62 part-solid nodules. SSN subclassification showed a significant linear trend with invasive degree of the adenocarcinoma spectrum (pure GGNs 7%; heterogeneous GGNs 36...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29150217/idiopathic-macular-telangiectasia-type-2-prevalence-and-a-morphometric-and-phenotypic-study
#18
R M Bayón-Porras, I Pascual-Camps, C Plaza-Laguardia, R Gallego-Pinazo
OBJECTIVE: Type 2 idiopathic macular telangiectasia (MacTel2) is a rare retinal disease that has still not been well-defined. The aim of the present manuscript is to describe the clinical features by multimodal retinal imaging, to present the functional characteristics, and to estimate the prevalence of the disease. METHODS: A retrospective study was conducted on the 12 eyes of 6 patients with MacTel2. Fundus colour photographs, fundus autofluorescence, fluorescein angiography, optical coherence tomography (OCT), and OCT-angiography were performed and subsequently analysed...
November 14, 2017: Archivos de la Sociedad Española de Oftalmología
https://www.readbyqxmd.com/read/29149824/the-role-of-gene-therapy-in-the-treatment-of-retinal-diseases-a-review
#19
Claudio Campa, Carla Enrica Gallenga, Elena Bolletta, Paolo Perri
Background: Gene therapy represents the therapeutic delivery of nucleic acid polymers into a patient's cells with the aim of treating an underlying disease. Over the past 2 decades this new therapy has made substantial progress owing to better understanding of the pathobiologic basis of various diseases coupled with growth of gene transfer biotechnologies. The eye, in particular, represents a suitable target for such therapy due to the immune privilege provided by the blood-ocular barrier, the ability to directly visualize, access and locally treat the cells and the minimal amount of vector needed given the size of this organ...
November 16, 2017: Current Gene Therapy
https://www.readbyqxmd.com/read/29148536/characterization-of-foreign-materials-in-paraffin-embedded-pathological-specimens-using-in-situ-multi-elemental-imaging-with-laser-spectroscopy
#20
Benoit Busser, Samuel Moncayo, Florian Trichard, Vincent Bonneterre, Nicole Pinel, Frédéric Pelascini, Philippe Dugourd, Jean-Luc Coll, Michel D'Incan, Julie Charles, Vincent Motto-Ros, Lucie Sancey
Pathologists typically encounter many disparate exogenous materials in clinical specimens during their routine histopathological examinations, especially within the skin, lymph nodes, and lungs. These foreign substances may be free extracellular deposits or induce several clinical abnormalities or histopathological patterns. However, pathologists almost never investigate or report the chemical nature of exogenous metals in clinical specimens due to a lack of convenient and available technologies. In this paper, a novel strategy based on laser-induced breakdown spectroscopy (LIBS) technology is evaluated for in situ multi-elemental tissue imaging...
November 17, 2017: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
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