keyword
MENU ▼
Read by QxMD icon Read
search

Diffusion imaging

keyword
https://www.readbyqxmd.com/read/29356252/white-matter-integrity-disruptions-correlate-with-cognitive-impairments-in-asthma
#1
Rongrong Bian, Yuqun Zhang, Yuan Yang, Yingying Yin, Xiaoxin Zhao, Huanxin Chen, Yonggui Yuan
BACKGROUND: Cognitive impairments are common in asthma, which is a serious global health problem characterized by chronic airway inflammation. However, the underlying neuromechanism is still unclear. PURPOSE/HYPOTHESIS: To investigate the neuromechanism underlying cognitive impairments of asthma. We hypothesized that asthma patients exhibit altered white matter (WM) microstructures, which may contribute to their cognitive impairments. STUDY TYPE: Case-control study...
January 21, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29356183/whole-brain-white-matter-histogram-analysis-of-diffusion-tensor-imaging-data-detects-microstructural-damage-in-mild-cognitive-impairment-and-alzheimer-s-disease-patients
#2
Giovanni Giulietti, Mario Torso, Laura Serra, Barbara Spanò, Camillo Marra, Carlo Caltagirone, Mara Cercignani, Marco Bozzali
BACKGROUND: Amnestic mild cognitive impairment (MCI) is a transitional stage between normal aging and Alzheimer's disease (AD). However, the clinical conversion from MCI to AD is unpredictable. Hence, identification of noninvasive biomarkers able to detect early changes induced by dementia is a pressing need. PURPOSE: To explore the added value of histogram analysis applied to measures derived from diffusion tensor imaging (DTI) for detecting brain tissue differences between AD, MCI, and healthy subjects (HS)...
January 21, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29355936/auditory-structural-connectivity-in-preterm-and-healthy-term-infants-during-the-first-postnatal-year
#3
Leire Zubiaurre-Elorza, Annika C Linke, Charlotte Herzmann, Conor J Wild, Hester Duffy, David S C Lee, Victor K Han, Rhodri Cusack
Assessing language development in the first postnatal year is difficult, as receptive and expressive skills are rudimentary. Although outward manifestations of change are limited, the auditory language system is thought to undergo critical development at this age, as the foundations are laid for the rapid onset of spoken language in the second and third years. We recruited 11 infants, 7 healthy controls (gestational age = 40.69 ± 0.56; range from 40 to 41.43) and preterm babies (gestational age = 28...
January 22, 2018: Developmental Psychobiology
https://www.readbyqxmd.com/read/29355012/evaluation-of-transport-parameters-in-mos2-graphene-junction-devices-fabricated-by-chemical-vapor-deposition
#4
Young Chul Kim, Van Tu Nguyen, Soonil Lee, Ji-Yong Park, Yeong Hwan Ahn
We demonstrated imaging of the depletion layer in a MoS2/graphene heterojunction fabricated by chemical vapor deposition and obtained their transport parameters such as diffusion length, lifetime, and mobility by using scanning photocurrent microscopy (SPCM). The device exhibited n-type operation, which was determined by the MoS2 layer with lower mobility. SPCM revealed the presence of the depletion layer at the heterojunction, whereas graphene provided an excellent electrical contact for the MoS2 layer without resulting in rectifying behavior, even if they were anchored within a very short range...
January 22, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29354937/-therapeutic-effects-on-cerebral-white-matter-injury-of-premature-infants-treated-with-acupuncture-for-promoting-the-governor-vessel-and-tranquilizing-the-mind
#5
Shuying Cai, Zhenhuan Liu, Guilan Peng, Xinfa Huang, Yinlan Li, Shuxiang Hu
OBJECTIVE: To explore the repair effects of acupuncture for promoting the governor vessel and tranquilizing the mind (acupuncture technique) on cerebral white matter injury of premature infants. METHODS: A total of 56 cases of cerebral whiter matter injury of premature infants, the fetal age less than 35 weeks were selected and randomized into an observation group (27 cases) and a control group (29 cases). The routine basic rehabilitation therapy was used in the two groups...
January 12, 2018: Zhongguo Zhen Jiu, Chinese Acupuncture & Moxibustion
https://www.readbyqxmd.com/read/29354680/differential-rates-of-perinatal-maturation-of-human-primary-and-nonprimary-auditory-cortex
#6
Brian B Monson, Zach Eaton-Rosen, Kush Kapur, Einat Liebenthal, Abraham Brownell, Christopher D Smyser, Cynthia E Rogers, Terrie E Inder, Simon K Warfield, Jeffrey J Neil
Primary and nonprimary cerebral cortex mature along different timescales; however, the differences between the rates of maturation of primary and nonprimary cortex are unclear. Cortical maturation can be measured through changes in tissue microstructure detectable by diffusion magnetic resonance imaging (MRI). In this study, diffusion tensor imaging (DTI) was used to characterize the maturation of Heschl's gyrus (HG), which contains both primary auditory cortex (pAC) and nonprimary auditory cortex (nAC), in 90 preterm infants between 26 and 42 weeks postmenstrual age (PMA)...
January 2018: ENeuro
https://www.readbyqxmd.com/read/29354588/disruption-of-the-corticoreticular-tract-in-pediatric-patients-with-trunk-instability-a-diffusion-tensor-tractography-study
#7
Su Min Son, So Min Shin
The authors report the diffusion tensor tractography (DTT) findings of three pediatric patients with gait dysfunction and corticoreticular tract (CRT) disruption. All three patients showed unilateral trunk instability, but they did not show any spasticity or weakness of the distal extremities. Clinical evaluation of trunk instability using a Trunk Control Measurement Scale (TCMS) revealed that the more affected side had a lower score than the contralateral side. DTT showed disrupted CRTs in hemispheres contralateral to the hemiparetic sides, which were associated with unilateral proximal instability, although conventional MRI showed no abnormal lesion explaining the hemiplegic symptom...
December 2017: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/29354585/neuroanatomical-mechanism-of-cerebellar-mutism-after-stroke
#8
Sekwang Lee, Yoon Hye Na, Hyun Im Moon, Woo Suk Tae, Sung-Bom Pyun
Cerebellar mutism (CM) is a rare neurological condition characterized by lack of speech due to cerebellar lesions. CM is often reported in children. We describe a rare case of CM after spontaneous cerebellar hemorrhage. The patient showed mutism, irritability, decreased spontaneous movements and oropharyngeal apraxia. Diffusion tensor imaging revealed significant volume reduction of medial frontal projection fibers from the corpus callosum. In Tracts Constrained by UnderLying Anatomy (TRACULA) analysis, forceps major and minor and bilateral cingulum-angular bundles were not visualized...
December 2017: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/29354336/severe-hypoglycemia-induced-right-hemiparesis-with-reversible-diffusion-restriction-in-the-left-internal-capsule-due-to-combination-therapy-using-disopyramide-and-clarithromycin
#9
Yoshito Sugita, Masaomi Koyanagi, Masashi Oda, Tamaki Kobayashi, Osamu Narumi, Masaaki Saiki
Severe hypoglycemia is known to cause acute focal neurological symptoms. In cases with a medical history of diabetes mellitus (DM), the diagnosis and treatment of hypoglycemia-induced neurological symptoms are simple. However, severe hypoglycemia can occur in patients who are not taking hypoglycemic agents such as insulin or long-acting sulfonylurea drugs. We describe a 95-year-old man with sudden onset of right hemiparesis who showed high signal intensity on diffusion-weighted imaging involving the left internal capsule with corresponding reduced apparent diffusion coefficient hypointensity...
January 2018: NMC Case Report Journal
https://www.readbyqxmd.com/read/29354241/the-potential-of-diffusion-weighted-magnetic-resonance-imaging-for-predicting-the-outcomes-of-chronic-subdural-hematomas
#10
Seung-Hwan Lee, Jong-Il Choi, Dong-Jun Lim, Sung-Kon Ha, Sang-Dae Kim, Se-Hoon Kim
Objective: Diffusion-weighted magnetic resonance imaging (DW-MRI) has proven useful in the study of the natural history of ischemic stroke. However, the potential of DW-MRI for the evaluation of chronic subdural hematoma (CSDH) has not been established. In this study, we investigated DW-MRI findings of CSDH and evaluated the impact of the image findings on postoperative outcomes of CSDH. Methods: We studied 131 CSDH patients who had undergone single burr hole drainage surgery...
January 2018: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/29354213/neuroimaging-in-cerebral-small-vessel-disease-update-and-new-concepts
#11
Mika Shibuya, Claudia da Costa Leite, Leandro Tavares Lucato
In recent years, small vessel disease (SVD) has been recognized for its major impact on cognitive impairment in elderly people, where it is often difficult to separate its effects from those of neurodegenerative diseases individually. SVD is a systemic disease, probably related to diffuse endothelial dysfunction, which affects the perforating arterioles, capillaries and venules in the brain. Although often asymptomatic, it is responsible for almost half of all dementia cases and a significant proportion of stroke cases...
October 2017: Dementia & Neuropsychologia
https://www.readbyqxmd.com/read/29354003/diffusion-weighted-mr-imaging-of-unicystic-odontogenic-tumors-for-differentiation-of-unicystic-ameloblastomas-from-keratocystic-odontogenic-tumors
#12
Yifeng Han, Xindong Fan, Lixin Su, Zhenfeng Wang
Objective: Differentiating unicystic ameloblastomas from keratocystic odontogenic tumors (KCOT) is necessary for the planning of different treatment strategies; however, it is difficult based on conventional CT and MR sequences alone. The purpose of this study was to investigate the utility of diffusion-weighted imaging (DWI) and apparent diffusion coefficients (ADCs) in the differentiation of the two tumors. Materials and Methods: We prospectively studied 40 patients with odontogenic cysts and tumors of the maxillomandibular region using conventional MR imaging and DWI...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29353998/diffusion-weighted-mri-for-the-initial-viability-evaluation-of-parasites-in-hepatic-alveolar-echinococcosis-comparison-with-positron-emission-tomography
#13
Jianjun Zheng, Jing Wang, Jianqing Zhao, Xianyun Meng
Objective: More than 70% of hepatic alveolar echinococcosis (HAE) are inoperable. Thus, long-term, or even life-long, pharmacological treatment with benzimidazoles is necessary. For effective treatment, it is of great importance to employ imaging techniques to detect and monitor the non-resectable parasitic viability. Therefore, this study aimed to evaluate diffusion-weighted imaging (DWI) in assessing the viability of HAE in comparison to 18-fluoro-deoxyglucose (18F-FDG) positron emission tomography, combined with computed tomography (PET/CT)...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29353880/differential-effect-of-disease-associated-st8sia2-haplotype-on-cerebral-white-matter-diffusion-properties-in-schizophrenia-and-healthy-controls
#14
REVIEW
Janice M Fullerton, Paul Klauser, Rhoshel K Lenroot, Alex D Shaw, Bronwyn Overs, Anna Heath, Murray J Cairns, Joshua Atkins, Rodney Scott, Peter R Schofield, Cyndi Shannon Weickert, Christos Pantelis, Alex Fornito, Thomas J Whitford, Thomas W Weickert, Andrew Zalesky
Brain white matter abnormalities are evident in individuals with schizophrenia, and also their first-degree relatives, suggesting that some alterations may relate to underlying genetic risk. The ST8 alpha-N-acetyl-neuraminide alpha-2,8-sialyltransferase 2 (ST8SIA2) gene, which encodes the alpha-2,8-sialyltransferase 8B enzyme that aids neuronal migration and synaptic plasticity, was previously implicated as a schizophrenia susceptibility gene. This study examined the extent to which specific haplotypes in ST8SIA2 influence white matter microstructure using diffusion-weighted imaging of individuals with schizophrenia (n = 281) and healthy controls (n = 172), recruited across five Australian sites...
January 22, 2018: Translational Psychiatry
https://www.readbyqxmd.com/read/29353736/mitochondrial-leukoencephalopathies-a-border-zone-between-acquired-and-inherited-white-matter-disorders-in-children
#15
Parayil Sankaran Bindu, Kothari Sonam, Shwetha Chiplunkar, Periyasamy Govindaraj, Madhu Nagappa, Chetan Chandrakanth Vekhande, Hanumanthapura R Aravinda, Jn Jessiena Ponmalar, Anita Mahadevan, Narayanappa Gayathri, Mm Srinivas Bharath, Sanjib Sinha, Arun B Taly
BACKGROUND: There is emerging evidence implicating mitochondrial dysfunction in the pathogenesis of acquired demyelinating disorders such as multiple sclerosis. On the other hand, some of the primary mitochondrial disorders such as mitochondrial leukoencephalopathies exhibit evidence of neuroinflammation on MRI. The inter-relationship between mitochondrial disorders and episodic CNS inflammation needs exploration because of the therapeutic implications. OBJECTIVE: We sought to analyze the clinical course and MRI characteristics in a cohort of patients with mitochondrial leukoencephalopathy to determine features, if any, that mimic primary demyelinating disorders...
January 6, 2018: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/29353560/does-non-echo-planar-diffusion-weighted-magnetic-resonance-imaging-have-a-role-in-assisting-the-clinical-diagnosis-of-cholesteatoma-in-selected-cases
#16
R Nash, R K Lingam, D Chandrasekharan, A Singh
OBJECTIVE: To determine the diagnostic performance of diffusion-weighted magnetic resonance imaging in the assessment of patients with suspected, but not clinically evident, cholesteatoma. METHODS: A retrospective analysis of a prospectively collected database of non-echo-planar diffusion-weighted magnetic resonance imaging studies (using a half-Fourier single-shot turbo-spin echo sequence) was conducted. Clinical records were retrospectively reviewed to determine indications for imaging and operative findings...
January 22, 2018: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/29353529/ultrasound-shear-wave-elastography-of-the-normal-prostate-interobserver-reproducibility-and-comparison-with-functional-magnetic-resonance-tissue-characteristics
#17
Hugh Harvey, Veronica Morgan, Jeremie Fromageau, Tuathan O'Shea, Jeffrey Bamber, Nandita M deSouza
The purpose of this study was to establish interobserver reproducibility of Young's modulus (YM) derived from ultrasound shear wave elastography (US-SWE) in the normal prostate and correlate it with multiparametric magnetic resonance imaging (mpMRI) tissue characteristics. Twenty men being screened for prostate cancer underwent same-day US-SWE (10 done by two blinded, newly-trained observers) and mpMRI followed by 12-core biopsy. Bland-Altman plots established limits of agreement for YM. Quantitative data from the peripheral zone (PZ) and the transitional zone (TZ) for YM, apparent diffusion coefficient (ADC, mm2/s from diffusion-weighted MRI), and Ktrans (volume transfer coefficient, min-1), Ve (extravascular-extracellular space, %), Kep (rate constant, /min), and initial area under the gadolinium concentration curve (IAUGC60, mmol/L/s) from dynamic contrast-enhanced MRI were obtained for slice-matched prostate sextants...
January 1, 2018: Ultrasonic Imaging
https://www.readbyqxmd.com/read/29353434/prediction-of-progression-in-skull-base-meningiomas-additional-benefits-of-apparent-diffusion-coefficient-value
#18
Ching-Chung Ko, Sher-Wei Lim, Tai-Yuan Chen, Jeon-Hor Chen, Chien-Feng Li, Yow-Ling Shiue
A subset of benign (WHO grade I) skull base meningiomas show early progression/recurrence (P/R) in the first years after surgical resection. Besides, complete surgical resection may be difficult to achieve safely in skull base meningiomas due to complex neurovascular structures. The one main challenge in the treatment of skull base meningiomas is to determine factors that correlate with P/R. We retrospectively investigated the preoperative CT and MR imaging features for the prediction of P/R in skull base meningiomas, with emphasis on quantitative ADC values...
January 20, 2018: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/29353280/microstructure-of-strategic-white-matter-tracts-and-cognition-in-memory-clinic-patients-with-vascular-brain-injury
#19
J Matthijs Biesbroek, Alexander Leemans, Hanna den Bakker, Marco Duering, Benno Gesierich, Huiberdina L Koek, Esther van den Berg, Albert Postma, Geert Jan Biessels
BACKGROUND: White matter injury is an important factor for cognitive impairment in memory clinic patients. We determined the added value of diffusion tensor imaging (DTI) of strategic white matter tracts in explaining variance in cognition in memory clinic patients with vascular brain injury. METHODS: We included 159 patients. Conventional MRI markers (white matter hyperintensity volume, lacunes, nonlacunar infarcts, brain atrophy, and microbleeds), and fractional anisotropy and mean diffusivity (MD) of the whole brain white matter and of 18 white matter tracts were related to cognition using linear regression and Bayesian network analysis...
January 19, 2018: Dementia and Geriatric Cognitive Disorders
https://www.readbyqxmd.com/read/29353032/clinical-assessment-and-brain-findings-in-a-cohort-of-mothers-fetuses-and-infants-infected-with-zika-virus
#20
Magdalena Sanz Cortes, Ana Maria Rivera, Mayel Yepez, Carolina V Guimaraes, Israel Diaz Yunes, Alexander Zarutskie, Ivan Davila, Anil Shetty, Arun Mahadev, Saray Maria Serrano, Nicolas Castillo, Wesley Lee, Gregory Valentine, Michael Belfort, Guido Parra, Carrie Mohila, Kjersti Aagaard, Miguel Parra
BACKGROUND: Congenital Zika virus (ZIKV) infection can be detected in both the presence and absence of microcephaly, and manifests as a number of signs and symptoms detected clinically and by neuroimaging. However, to date, qualitative and quantitative measures for the purpose of diagnosis and prognosis are limited. OBJECTIVES: Main objectives of this study conducted on fetuses and infants with confirmed congenital ZIKV infection and detected brain abnormalities are: 1) To assess the prevalence of microcephaly and the frequency of the anomalies including a detailed description based on ultrasound and magnetic resonance imaging (MRI) in fetuses and ultrasound, MRI and computed tomography imaging postnatally; 2) To provide quantitative measures of fetal and infant brain findings by MRI using volumetric analyses and diffusion weighted imaging (DWI); 3) To obtain additional information from placental and fetal histopathological assessments and postnatal clinical evaluations...
January 15, 2018: American Journal of Obstetrics and Gynecology
keyword
keyword
55770
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"