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Transcranial sonography

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https://www.readbyqxmd.com/read/29675634/investigation-of-circle-of-willis-variants-and-hemodynamic-parameters-in-twins-using-transcranial-color-coded-doppler-sonography
#1
Bianka Forgó, Ádám Domonkos Tárnoki, Dávid László Tárnoki, Levente Littvay, Corrado Fagnani, Maria Antonietta Stazi, Giorgio Meneghetti, Emanuela Medda, Filippo Farina, Claudio Baracchini
Morphological and hemodynamic variations of the circle of Willis (CW) may have an important impact on cerebrovascular events. However, the environmental and genetic influence remains unclear. For this reason we studied the variations and hemodynamic parameters of the CW in twins using transcranial color-coded sonography (TCCS). Sixty-four twins, 19 monozygotic (MZ) and 13 dizygotic (DZ) pairs from the Italian Twin Registry (average age 45.0 ± 13.7 years) underwent TCCS and risk factor assessment. We examined CW morphology and recorded peak systolic velocity (PSV), end-diastolic velocity (EDV) and pulsatility index (PI)...
April 19, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29660362/variability-in-cerebral-blood-flow-velocity-at-rest-and-during-mental-stress-in-healthy-individuals-associations-with-cardiovascular-parameters-and-cognitive-performance
#2
Casandra I Montoro, Stefan Duschek, Gustavo A Reyes Del Paso
This study analyzed variability in cerebral blood flow velocity (CBFV) and possible underlying physiological mechanisms during rest and a mental arithmetic task. Blood flow velocities were bilaterally recorded by transcranial Doppler sonography in the anterior and middle cerebral arteries of 43 participants. Electrocardiography, continuous blood pressure (BP) and respiratory recordings were additionally obtained. Fast Fourier transformation revealed a spectral profile with two main components in CBFV, one in the very low frequency (VLF, 0...
April 13, 2018: Biological Psychology
https://www.readbyqxmd.com/read/29614699/substantia-nigra-echogenicity-associated-with-clinical-subtypes-of-parkinson-s-disease
#3
Hai-Yan Zhou, Pei Huang, Qian Sun, Juan-Juan Du, Shi-Shuang Cui, Yu-Yan Tan, Yun-Yun Hu, Wei-Wei Zhan, Ying Wang, Qin Xiao, Jun Liu, Sheng-Di Chen
BACKGROUND: It is debatable whether transcranial sonography (TCS) could be a biomarker for monitoring disease progression. Various phenotypes of Parkinson's disease (PD) may be a major reason contributing to the inconsistency. OBJECTIVE: We classified PD patients into different subtypes and evaluated the correlation between SN echogenicity and disease progression. METHODS: A total of 411 PD patients were included in this study. TCS evaluations of the substantia nigra (SN) were performed, and motor and non-motor symptoms were assessed by a series of rating scales in all PD patients...
March 26, 2018: Journal of Parkinson's Disease
https://www.readbyqxmd.com/read/29614647/reduced-cerebrovascular-reserve-capacity-as-a-biomarker-of-microangiopathy-in-alzheimer-s-disease-and-mild-cognitive-impairment
#4
Barbora Soukupova Urbanova, Jaroslava Paulasova Schwabova, Hana Magerova, Petr Jansky, Hana Markova, Martin Vyhnalek, Jan Laczo, Jakub Hort, Ales Tomek
BACKGROUND: Cerebral microangiopathy in Alzheimer's disease (AD) causes chronic hypoperfusion and probably accelerates neurodegenerative changes. OBJECTIVE: We hypothesize microvascular impairment could be present already in mild cognitive impairment (MCI) and can be revealed using transcranial color-coded sonography (TCCS) and the breath-holding maneuver. METHODS: Three groups of subjects (AD in the stage of dementia, MCI, and cognitively normal controls) with detailed neuropsychological testing and low cerebrovascular burden (no history of stroke, no intra- or extracranial artery stenoses, and no severe vascular lesions on brain MRI), underwent a TCCS assessment of peak systolic (PSV), mean flow (MFV), and end diastolic velocities (EDV) and resistance and pulsatility indices (RI, PI) in large intracranial vessels bilaterally...
March 24, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29575385/transcranial-sonography-to-differentiate-primary-intracerebral-hemorrhage-from-cerebral-infarction-with-hemorrhagic-transformation
#5
Wolf-Dirk Niesen, Axel Schläger, Matthias Reinhard, Hannah Fuhrer
BACKGROUND AND PURPOSE: The differentiation of primary intracerebral hemorrhage (ICH) from parenchymal hemorrhagic transformation within an ischemic infarction (PHI) is crucial in order to adapt therapeutic measures. We hypothesized that a distinction of ICH and PHI can be made at bedside via transcranial gray-scale and perfusion sonography. METHODS: We prospectively included 14 patients with intracranial hemorrhage on admission imaging in this pilot study. Differentiation between ICH and PHI was made either by cerebral magnetic resonance imaging or follow-up computed tomography scan...
March 25, 2018: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/29551220/contrast-enhanced-color-coded-doppler-sonography-in-moyamoya-disease-a-retrospective-study
#6
Woo-Keun Seo, Chang-Woon Choi, Chi Kyung Kim, Kyungmi Oh
The purpose of this study was to validate the feasibility of contrast-enhanced transcranial Doppler sonography (CE-TCCD) in the diagnosis of Moyamoya disease (MMD). CE-TCCD data on patients with MMD were analyzed. The CE-TCCD data were classified qualitatively into four patterns by two independent investigators: normal vascular color Doppler signal (pattern 1), augmented color Doppler signal with identifiable vascular structure (pattern 2), confluent color Doppler signal filling more than two-thirds of the display frame without identifiable vascular structure (pattern 3) and confluent color Doppler signal filling full display (pattern 4)...
March 15, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29503329/neuroimaging-in-parkinsonian-disorders
#7
REVIEW
Madhavi Tripathi, Atin Kumar, Chandrasekhar Bal
Neuroimaging (NI) in Parkinson's disease (PD) includes functional techniques like positron emission tomography (PET) and single photon emission computed tomography (SPECT), and morphological imaging using magnetic resonance imaging (MRI) and transcranial sonography to probe different aspects of the neurobiology of PD. Changes in neurotransmitters in various regions of the brain and their influence on brain networks is the basis for the motor symptoms of PD which are interrogated by NI. The recent Movement Disorders Society Clinical Diagnostic Criteria for PD (MDS-PD) have included the results of a few of these neuroimaging techniques to serve as single supportive criteria or absolute exclusion criteria for the diagnosis of PD...
March 2018: Neurology India
https://www.readbyqxmd.com/read/29503019/the-assessment-of-diagnostic-accuracy-for-basilar-artery-stenosis-by-transcranial-color-coded-sonography
#8
Jie Yang, Yang Hua, Xiang Li, Mingjie Gao, Qiuping Li, Beibei Liu, Liqun Jiao
This study aimed to determine the optimal criteria for evaluating basilar artery stenosis (BAS) by transcranial color-coded sonography (TCCS). A total of 403 cases with both TCCS and digital subtraction angiography (DSA) were enrolled. Peak systolic velocity (PSV), end diastolic velocity (EDV) and mean flow velocity (MFV) of the basilar artery (BA), intracranial vertebral artery (IVA) and posterior cerebral artery (PCA) were measured. The ratios PSVBA /PSVIVA and PSVBA /PSVPCA were calculated. With DSA as the reference, the optimal criteria for grading BAS were determined by receiver operating characteristic analysis...
March 1, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29492544/a-wearable-transcranial-doppler-ultrasound-phased-array-system
#9
Sabino J Pietrangelo, Hae-Seung Lee, Charles G Sodini
OBJECTIVE:  Practical deficiencies related to conventional transcranial Doppler (TCD) sonography have restricted its use and applicability. This work seeks to mitigate several such constraints through the development of a wearable, electronically steered TCD velocimetry system, which enables noninvasive measurement of cerebral blood flow velocity (CBFV) for monitoring applications with limited operator interaction. MATERIALS AND METHODS: A highly-compact, discrete prototype system was designed and experimentally validated through flow phantom and preliminary human subject testing...
2018: Acta Neurochirurgica. Supplement
https://www.readbyqxmd.com/read/29485961/cerebral-function-and-perfusion-during-cardiopulmonary-bypass-a-plea-for-a-multimodal-monitoring-approach
#10
Marcus Thudium, Ingo Heinze, Richard K Ellerkmann, Tobias Hilbert
BACKGROUND: Postoperative neurological injury still represents a major cause of morbidity after cardiac surgery. Our objective was to compare the limits as well as advantages of routine monitoring tools for the detection of cerebral function and perfusion deficits during cardiopulmonary bypass in a daily clinical setting. METHODS: Adult patients undergoing elective cardiac surgery with use of cardiopulmonary bypass were included. Patients received monitoring comprising Bispectral Index (BIS), Near Infrared Spectroscopy (NIRS) and assessment of middle cerebral artery flow velocity (MCAV) using transcranial Doppler (TCD) sonography...
January 31, 2018: Heart Surgery Forum
https://www.readbyqxmd.com/read/29460296/an-exploratory-analysis-of-the-influence-of-personality-and-emotional-factors-on-cerebral-blood-flow-responses-during-painful-stimulation-in-fibromyalgia
#11
Casandra I Montoro Aguilar, Stefan Duschek, Gustavo A Reyes Del Paso
This study explored the influence of certain personality traits (neuroticism, extraversion, psychoticism, alexithymia), emotional variables (depression, catastrophizing), and insomnia on cerebral blood flow (CBF) responses to painful stimulation in fibromyalgia, using functional transcranial Doppler sonography. CBF velocities were recorded bilaterally in the anterior cerebral arteries (ACA) and middle cerebral arteries (MCA) of 24 fibromyalgia patients during exposure to two painful pressure conditions: (1) fixed pressure (2...
February 19, 2018: Scandinavian Journal of Psychology
https://www.readbyqxmd.com/read/29406916/quantitative-transcranial-sonography-in-wilson-s-disease-and-healthy-controls-cut-off-values-and-functional-correlates
#12
Gotthard G Tribl, Mateus C Trindade, Kelson James Almeida, Rosana Cardoso Alves, Daniel Ciampi de Andrade, Erich T Fonoff, Alexandre A Machado, Manoel J Teixeira, Egberto R Barbosa, Edson Bor-Seng-Shu
To compare transcranial sonography (TCS) findings in patients with predominantly neurological Wilson's disease (WD) to those from controls, and to correlate TCS data with the clinical profile of WD. Patients with WD (n=40/f=18) and healthy, matched controls (n=49/f=20) were assessed in terms of TCS, serum copper and iron parameters, and clinical scales, such as the Unified Wilson's Disease Rating Scale (UWDRS), Addenbrooke's Cognitive Examination-Revised (ACE-R), Mini Mental State Examination (MMSE), and Beck Depression Inventory...
February 15, 2018: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/29380907/dopamine-reuptake-transporter-single-photon-emission-computed-tomography-and-transcranial-sonography-as-imaging-markers-of-prediagnostic-parkinson-s-disease
#13
Alastair J Noyce, John Dickson, Richard N Rees, Jonathan P Bestwick, Ioannis U Isaias, Marios Politis, Gavin Giovannoni, Thomas T Warner, Andrew J Lees, Anette Schrag
OBJECTIVE: The objective of this study was to examine whether prediagnostic features of Parkinson's disease (PD) were associated with changes in dopamine reuptake transporter-single-photon emission computed tomography and transcranial sonography. METHODS: Prediagnostic features of PD (risk estimates, University of Pennsylvania Smell Identification Test, Rapid Eye Movement Sleep Behavior Disorder Screening Questionnaire, and finger-tapping scores) were assessed in a large cohort of older U...
January 30, 2018: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29343241/clinical-features-and-dysfunctions-of-iron-metabolism-in-parkinson-disease-patients-with-hyper-echogenicity-in-substantia-nigra-a-cross-sectional-study
#14
Shu-Yang Yu, Chen-Jie Cao, Li-Jun Zuo, Ze-Jie Chen, Teng-Hong Lian, Fang Wang, Yang Hu, Ying-Shan Piao, Li-Xia Li, Peng Guo, Li Liu, Qiu-Jin Yu, Rui-Dan Wang, Piu Chan, Sheng-di Chen, Xiao-Min Wang, Wei Zhang
BACKGROUND: Transcranial ultrasound is a useful tool for providing the evidences for the early diagnosis and differential diagnosis of Parkinson disease (PD). However, the relationship between hyper echogenicity in substantia nigra (SN) and clinical symptoms of PD patients remains unknown, and the role of dysfunction of iron metabolism on the pathogenesis of SN hyper echogenicity is unclear. METHODS: PD patients was detected by transcranial sonography and divided into with no hyper echogenicity (PDSN-) group and with hyper echogenicity (PDSN+) group...
January 17, 2018: BMC Neurology
https://www.readbyqxmd.com/read/29334161/the-role-of-neurosonology-in-the-diagnosis-and-management-of-patients-with-carotid-artery-disease-a-review
#15
REVIEW
Odysseas Kargiotis, Apostolos Safouris, Georgios Magoufis, Maria Georgala, Andromachi Roussopoulou, Eleftherios Stamboulis, Konstantinos G Moulakakis, Andreas Lazaris, George Geroulakos, Spyros Vasdekis, Georgios Tsivgoulis
Carotid artery disease (CAD) is a common cause of ischemic stroke with high rates of recurrence. Carotid endarterectomy (CEA) or carotid artery stenting (CAS) are highly recommended for the secondary prevention of symptomatic CAD during the first 14 days following the index event of transient ischemic attack or minor stroke. CEA or CAS may also be offered in selected cases with severe asymptomatic stenosis. Herein, we review the utility of neurosonology in the diagnosis and pre-/peri-interventional assessment of CAD patients who undergo carotid revascularization procedures...
January 15, 2018: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/29288194/increased-middle-cerebral-artery-mean-blood-flow-velocity-index-after-stroke-thrombectomy-indicates-increased-risk-for-intracranial-hemorrhage
#16
Markus Kneihsl, Kurt Niederkorn, Hannes Deutschmann, Christian Enzinger, Birgit Poltrum, Renate Fischer, Daniela Thaler, Christina Hermetter, Gerit Wünsch, Franz Fazekas, Thomas Gattringer
BACKGROUND AND PURPOSE: Cerebral hyperperfusion has been related to the risk of intracranial hemorrhage (ICH) in stroke patients after vessel recanalization therapy. We hypothesized that after successful mechanical thrombectomy for acute anterior circulation stroke, hemodynamics detectable by transcranial Duplex (TCD) sonography would vary, and that increased blood flow velocities would be associated with ICH. METHODS: We retrospectively identified all ischemic stroke patients with successful endovascular recanalization for anterior circulation vessel occlusion (Thrombolysis in Cerebral Infarction 2b-3) between 2010 and 2017...
December 28, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29280236/advanced-pediatric-neurosonography-techniques-contrast-enhanced-ultrasonography-elastography-and-beyond
#17
Misun Hwang, Becky J Riggs, Joseph Katz, Donna Seyfert, Frances Northington, Robinson Shenandoah, Irina Burd, Justin McArthur, Kassa Darge, Matthew A Thimm, Thierry A G M Huisman
Recent technical advances in neurosonography continue broadening the diagnostic utility, sensitivity, and specificity of ultrasound for detecting intracranial abnormalities bed side. The clinical and functional applications of neurosonography have significantly expanded since the 1980s when transcranial Doppler sonography first allowed anatomic and hemodynamic delineation of the intracranial vessels through the thin temporal skull. In the past few years, contrast-enhanced ultrasonography, elastography, 3D/4D reconstruction tools, and high-resolution microvessel imaging techniques have further enhanced the diagnostic significance of neurosonography...
March 2018: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/29249075/the-characteristics-of-transcranial-color-coded-duplex-sonography-in-children-with-cerebral-arteriovenous-malformation-presenting-with-headache
#18
Vlasta Duranovic, Katarina Vulin, Ivana Dakovic, Jasna Lenicek Krleza, Sanja Delin, Ivana Galinovic, Josip Marjanovic, Ana Tripalo Batos, Zdenka Plesa Premilovac, Vlatka Mejaski Bosnjak
PURPOSE: Cerebral arteriovenous malformations (AVM) are uncommon lesions. They are most often presented in childhood as intracranial hemorrhage. The aim of this report is to present the use of transcranial color-coded duplex sonography (TCCS) in detection of AVMs in children suffering headache. METHODS: This report describes five pediatric patients with headache and cerebral AVM which were initially discovered by TCCS. Diagnosis was confirmed by magnetic resonance imaging and digital subtraction angiography...
February 2018: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29243981/assessment-of-intracranial-venous-blood-flow-after-subarachnoid-hemorrhage-a-new-approach-to-diagnose-vasospasm-with-transcranial-color-coded-duplex-sonography
#19
Florian Connolly, Stephan J Schreiber, Christoph Leithner, Georg Bohner, Peter Vajkoczy, José M Valdueza
OBJECTIVE Transcranial color-coded duplex sonography (TCCS) is a reliable tool that is used to assess vasospasm in the M1 segment of the middle cerebral artery (MCA) after subarachnoid hemorrhage (SAH). A distinct increase in blood flow velocity (BFV) is the principal criterion for vasospasm. The MCA/internal carotid artery (ICA) index (Lindegaard Index) is also widely used to distinguish between vasospasm and cerebral hyperperfusion. However, extracranial ultrasonography assessment of the neck vessels might be difficult in an intensive care unit...
December 15, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29207924/speckle-tracking-in-transcranial-ultrasound-allows-noninvasive-analysis-of-pulsation-patterns-of-the-third-ventricle
#20
Benjamin Würzer, Cristina Laza, Jörn Pons-Kühnemann, Manfred Kaps, Bernd Junge, Florian C Roessler
Cerebrospinal fluid (CSF) flow is sensitive to many cerebral disorders. We aimed to develop a noninvasive bedside method to detect physiological and pathological CSF phenomena by measuring pulsation patterns of the third ventricle. By transcranial B-mode ultrasound, electrocardiography (ECG)-gated video loops of the third ventricle were acquired. "Speckle tracking" software was used to quantify the relative change of its width. We conducted measurements of nine cardiac cycles in 11 healthy subjects in sitting and in supine position during Valsalva maneuver to investigate the influence of an increased intracranial pressure on the relative deformation of the third ventricle...
March 2018: Ultrasonic Imaging
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