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31 P MRS

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https://www.readbyqxmd.com/read/28915341/-31-p-magnetic-resonance-fingerprinting-for-rapid-quantification-of-creatine-kinase-reaction-rate-in-vivo
#1
Charlie Y Wang, Yuchi Liu, Shuying Huang, Mark A Griswold, Nicole Seiberlich, Xin Yu
The purpose of this work was to develop a (31) P spectroscopic magnetic resonance fingerprinting (MRF) method for fast quantification of the chemical exchange rate between phosphocreatine (PCr) and adenosine triphosphate (ATP) via creatine kinase (CK). A (31) P MRF sequence (CK-MRF) was developed to quantify the forward rate constant of ATP synthesis via CK ( kfCK), the T1 relaxation time of PCr ( T1PCr), and the PCr-to-ATP concentration ratio ( MRPCr). The CK-MRF sequence used a balanced steady-state free precession (bSSFP)-type excitation with ramped flip angles and a unique saturation scheme sensitive to the exchange between PCr and γATP...
September 15, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28887396/influence-of-penumbral-reperfusion-on-clinical-outcome-depends-on-baseline-ischemic-core-volume
#2
Chushuang Chen, Mark W Parsons, Matthew Clapham, Christopher Oldmeadow, Christopher R Levi, Longting Lin, Xin Cheng, Min Lou, Timothy J Kleinig, Kenneth S Butcher, Qiang Dong, Andrew Bivard
BACKGROUND AND PURPOSE: In alteplase-treated patients with acute ischemic stroke, we investigated the relationship between penumbral reperfusion at 24 hours and clinical outcomes, with and without adjustment for baseline ischemic core volume. METHODS: Data were collected from consecutive acute ischemic stroke patients with baseline and follow-up perfusion imaging presenting to hospital within 4.5 hours of symptom onset at 7 hospitals. Logistic regression models were used for predicting the effect of the reperfused penumbral volume on the dichotomized modified Rankin Scale (mRS) at 90 days and improvement of National Institutes of Health Stroke Scale at 24 hours, both adjusted for baseline ischemic core volume...
September 8, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28877829/major-metabolite-levels-of-preoperative-proton-magnetic-resonance-sectroscopy-and-intraoperative-fluorescence-intensity-in-glioblastoma
#3
Hai-Long Tian, Yu-Liang Zu, Chao-Chao Wang, Tao Lin, Zhen-Tao Guo, Bin Jiang, Xin Yin, Wen-Qiang Guo, Zhi-Gang Wang
Objective To compare the intraoperative major metabolite level of preoperative proton magnetic resonance spectroscopy((1)H-MRS)and fluorescence intensity marked with fluorescein sodium(FLs)in glioblastoma(GBM)and thus provide an objective basis for fluorescence surgical treatment of GBM. Methods All newly diagnosed patients by plain and enhanced magnetic resonance imaging from the April 1,2014 to December 31,2015 were enrolled in this study.All of them received (1)H-MRS and marked with FLs.The expression of Ki67 in tumor boundary were confirmed by postoperative pathology and determined by immunostaining assay...
August 20, 2017: Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
https://www.readbyqxmd.com/read/28873125/neurological-complications-associated-with-anti-programmed-death-1-pd-1-antibodies
#4
Justin C Kao, Bing Liao, Svetomir N Markovic, Christopher J Klein, Elie Naddaf, Nathan P Staff, Teerin Liewluck, Julie E Hammack, Paola Sandroni, Heidi Finnes, Michelle L Mauermann
Importance: Neurological complications are an increasingly recognized consequence of the use of anti-programmed death 1 (PD-1) antibodies in the treatment of solid-organ tumors, with an estimated frequency of 4.2%. To date, the clinical spectrum and optimum treatment approach are not established. Objective: To investigate the frequency, clinical spectrum, and optimum treatment approach to neurological complications associated with anti-PD-1 therapy. Design, Setting, and Participants: This single-center, retrospective cohort study was conducted from either September or December 2014 (the approval dates of the study drugs by the US Food and Drug Administration) to May 19, 2016...
September 5, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/28846858/effects-of-dietary-induced-alterations-in-rat-brain-docosahexaenoic-acid-accrual-on-phospholipid-metabolism-and-mitochondrial-bioenergetics-an-in%C3%A2-vivo-31-p-mrs-study
#5
Diana M Lindquist, Ruth H Asch, Jennifer D Schurdak, Robert K McNamara
Evidence from (31)P magnetic resonance spectroscopy ((31)P MRS) studies suggest that different psychiatric disorders, which typically emerge during adolescence and young adulthood, are associated with abnormalities in mitochondrial bioenergetics and membrane phospholipid metabolism. These disorders are also associated with deficits in omega-3 polyunsaturated fatty acids (n-3 PUFA), including docosahexaenoic acid (DHA) which accumulates in mitochondrial and synaptic membranes. The present study investigated the effects of dietary-induced alterations in brain DHA accrual during adolescence on phospholipid metabolism and bioenergetics in the adult rat brain using (31)P MRS...
August 24, 2017: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/28818755/biochemical-abnormalities-in-basal-ganglia-and-executive-dysfunction-in-acute-and-euthymic-episode-patients-with-bipolar-disorder-a-proton-magnetic-resonance-spectroscopy-study
#6
Shunkai Lai, Shuming Zhong, Xiaoxiao Liao, Ying Wang, Jingyu Huang, Shanhong Zhang, Yao Sun, Hui Zhao, Yanbin Jia
BACKGROUND: Recent studies found abnormal biochemical metabolism and executive cognitive deficits in acute bipolar disorder (BD). However, the evidence concerning in euthymic BD is limited. Thus, a comparison between acute and euthymic BD is conductive to better understanding the association between cognition and the outcome of neuroimaging. This study sought to investigate the relationship between the executive function and the biochemical metabolism in acute- and euthymic-episode BD patients and delineate the prominent endophenotype of BD...
July 25, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28804482/risk-factors-for-intensive-care-unit-admission-in-patients-with-autoimmune-encephalitis
#7
Gayane Harutyunyan, Larissa Hauer, Martin W Dünser, Tobias Moser, Slaven Pikija, Markus Leitinger, Helmut F Novak, Wolfgang Aichhorn, Eugen Trinka, Johann Sellner
BACKGROUND: Prevention and early recognition of critical illness in patients with autoimmune encephalitis (AE) is essential to achieve better outcome. AIM OF THE STUDY: To evaluate risk factors for intensive care unit (ICU) admission and its prognostic impact in patients with AE. PATIENTS AND METHODS: A reclassification of patients hospitalized between 2011 and 2016 revealed 17 "definite" and 15 "probable" AE cases. Thirteen patients (41%) developed critical illness and required ICU admission...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28802797/cerebral-venous-sinus-thrombosis-clinical-features-long-term-outcome-and-recanalization
#8
Sibel Gazioglu, Ilker Eyuboglu, Ahmet Yildirim, Cigdem Ozen Aydin, Zekeriya Alioglu
Recanalization and prognosis of cerebral venous sinus thrombosis (CVST) are generally considered to be good, and various factors have been reported to be associated with recanalization in previous studies. Fifty patients diagnosed with CVST between September 2007 and July 2016 were analyzed retrospectively. Modified Rankin scale (mRS) scores at six months and results of follow-up imaging of patients with at least six months follow-up were also reviewed for the assessment of long term outcome, recanalization rates and factors associated with recanalization...
August 9, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28799875/direct-versus-indirect-bypasses-for-adult-ischemic-type-moyamoya-disease-a-propensity-score-matched-analysis
#9
Xiaofeng Deng, Faliang Gao, Dong Zhang, Yan Zhang, Rong Wang, Shuo Wang, Yong Cao, Yuanli Zhao, Yuesong Pan, Xingju Liu, Qian Zhang, Jizong Zhao
OBJECTIVE The optimal surgical modality for moyamoya disease (MMD) remains unclear. The aim of this study was to compare the surgical effects of direct bypass (DB) and indirect bypass (IB) in the treatment of adult ischemic-type MMD. METHODS Adult patients with ischemic-type MMD who underwent either DB or IB from 2009 to 2015 were identified retrospectively from a prospective database. Patients lost to follow-up or with a follow-up period less than 12 months were excluded. Recurrent stroke events and modified Rankin Scale (mRS) scores at the last follow-up were compared between the 2 surgical groups after 1:1 propensity score matching...
August 11, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28796443/relative-cerebral-blood-volume-is-a-potential-biomarker-in-late-delayed-radiation-induced-brain-injury
#10
Ying Xie, Haiwei Huang, Junjie Guo, Dongxiao Zhou
PURPOSE: To assess whether relative cerebral blood volume (rCBV) can provide information to reliably evaluate the stages of late delayed radiation-induced brain injury. MATERIALS AND METHODS: Forty patients diagnosed with late delayed radiation-induced brain injury were enrolled. The patients were examined using a 1.5T magnetic resonance imaging (MRI) system equipped with an 8-channel head coil. An echo planar imaging (EPI) sequence was used in perfusion-weighted imaging (PWI)...
August 10, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28780838/-retrospective-analysis-of-the-discharge-outcome-of-external-ventricular-drainage-and-conservative-treatment-in-patients-with-severe-intraventricular-hemorrhage
#11
Y F Liu, H C Qiu, G F Zhao, J L Yang, G L Lü, J Lü, W M Kang, B Yan, J Liu, S M Zhao, W J Jiang
Objective: To investigate the discharge outcome of external ventricular drainage(EVD) and conservative treatment in patients with severe intraventricular hemorrhage (SeIVH). Methods: From January 2011 to December 2016, patients with SeIVH admitted to the General Hospital of the PLA Rocket Force and the Army General Hospital received EVD treatment and were classified as the treatment group. According to intraventricular hemorrhage volume and age, patients received conservative treatment were pair matched and classified as control group...
August 1, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28756015/mechanical-thrombectomy-in-acute-stroke-five-years-of-experience-in-poland
#12
Agnieszka Słowik, Marcin Wnuk, Paweł Brzegowy, Joanna Chrzanowska-Waśko, Aleksandra Golenia, Bartłomiej Łasocha, Dorota Włoch-Kopeć, Antoni Ferens, Wojciech Serednicki, Piotr Jarocki, Halina Bartosik-Psujek, Rafał Kaczorowski, Edward Filip, Monika Grzegorzak, Jarosław Homa, Janusz Darocha, Daniel Dudek, Wiesław Guz, Konrad Rejdak, Piotr Luchowski, Joanna Wojczal, Michał Sojka, Michał Górnik, Sylwia Stachowicz, Jacek Jaworski, Kinga Buraczyńska, Remigiusz Ficek, Anna Szczepańska-Szerej, Tomasz Jargiełło, Małgorzata Szczerbo-Trojanowska, Anetta Lasek-Bal, Przemysław Puz, Aldona Warsz-Wianecka, Arkadiusz Stęposz, Krzysztof Ziaja, Wacław Kuczmik, Tomasz Urbanek, Damian Ziaja, Witold Tomalski, Adam Kobayashi, Przemysław Richter, Andrzej Płoński, Marcin Kotkowski, Wojciech Czepiel, Iwona Kurkowska-Jastrzębska, Halina Sienkiewicz-Jarosz, Anna Członkowska, Beata BłażejewskaHyżorek, Danuta Ryglewicz, Magdalena Konopko, Edyta Brelak, Jacek Antecki, Igor Szydłowski, Maciej Włosek, Adam Stępień, Krzysztof Brzozowski, Jacek Staszewski, Piotr Piasecki, Piotr Zięcina, Izabela Wołoszyńska, Norbert Kolmaga, Jerzy Narloch, Tomasz Hasiec, Jacek Gawłowicz, Monika Pędracka, Jacek Porębiak, Bogumił Grzechnik, Vadym Matsibora, Michał Frąszczak, Marcin Leus, Maciej Mazgaj, Violetta Palacz-Duda, Grzegorz Meder, Wojciech Skura, Piotr Płeszka, Milena Świtońska, Krzysztof Słomiński, Józef Kościelniak, Paulina Sobieszak-Skura, Magdalena Konieczna-Brazis, Olgierd Rowiński, Andrzej Opuchlik, Anatol Mickielewicz, Beata Szyluk, Piotr Szczudlik, Anna Kostera-Pruszczyk, Maciej Jaworski, Rafał Maciąg, Jarosław Żyłkowski, Bożena Adamkiewicz, Wojciech Szubert, Jarosław Chrząstek, Marek Raźniewski, Agnieszka Pawelec, Paweł Wilimborek, Ryszard Wagner, Paweł Pilarski, Paweł Gierach, Jan Baron, Wojciech Gruszka, Stanisław Ochudło, Agnieszka Krzak-Kubica, Monika Rudzińska-Bar, Miłosz Zbroszczyk, Kamila Smulska, Michał Arkuszewski, Dorota Różański, Dariusz Koziorowski, Izabela Meisner-Kramarz, Stanisław Szlufik, Artur Zaczyński, Krzysztof Kądziołka, Kazimierz Kordecki, Michał Zawadzki, Mirosław Ząbek, Bartosz Karaszewski, Dariusz Gąsecki, Paweł Łowiec, Waldemar Dorniak, Tomasz Gorycki, Edyta Szurowska, Ewa Wierzchowska-Cioch, Tomasz Smyk, Beata Szajnoga, Marcin Bachta, Kajetan Mazurek, Magdalena Piwowarska, Wojciech Kociemba, Artur Drużdż, Adrian Dąbrowski, Michał Glonek, Małgorzata Wawrzyniak, Radosław Kaźmierski, Robert Juszkat, Witold Tomalski, Adam Heliosz, Adam Ryszczyk, Jacek Zwiernik, Grzegorz Wasilewski, Andrzej Tutaj, Grzegorz Dałek, Krzysztof Nosek, Sławomir Bereza, Katarzyna Lubkowska, Jerzy Kamienowski, Piotr Sobolewski, Adam Bielecki, Maciej Miś, Marcin Miś, Maria Krużewska-Orłowska, Jan Kochanowicz, Zenon Mariak, Marta Jakoniuk, Grzegorz Turek, Urszula Łebkowska, Andrzej Lewszuk, Kazimierz Kordecki, Tomasz Dziedzic, Tadeusz Popiela
OBJECTIVES: Mechanical thrombectomy (MT) is not reimbursed by the Polish public health system. We present a description of 5 years of experience with MT in acute stroke in Comprehensive Stroke Centers (CSCs) in Poland. METHODS AND RESULTS: We retrospectively analyzed the results of a structured questionnaire from 23 out of 25 identified CSCs and 22 data sets that include 61 clinical, radiological and outcome measures. RESULTS: Most of the CSCs (74%) were founded at University Hospitals and most (65...
July 5, 2017: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/28744847/factors-considered-by-clinicians-when-prognosticating-intracerebral-hemorrhage-outcomes
#13
David Y Hwang, Stacy Y Chu, Cameron A Dell, Mary J Sparks, Tiffany D Watson, Carl D Langefeld, Mary E Comeau, Jonathan Rosand, Thomas W K Battey, Sebastian Koch, Mario L Perez, Michael L James, Jessica McFarlin, Jennifer L Osborne, Daniel Woo, Steven J Kittner, Kevin N Sheth
BACKGROUND: The early subjective clinical judgment of clinicians outperforms formal prognostic scales for accurate determination of outcome after intracerebral hemorrhage (ICH), with the judgment of physicians and nurses having equivalent accuracy. This study assessed specific decisional factors that physicians and nurses incorporate into early predictions of functional outcome. METHODS: This prospective observational study enrolled 121 ICH patients at five US centers...
July 25, 2017: Neurocritical Care
https://www.readbyqxmd.com/read/28739392/large-improvement-of-rf-transmission-efficiency-and-reception-sensitivity-for-human-in-vivo-31-p-mrs-imaging-using-ultrahigh-dielectric-constant-materials-at-7t
#14
Byeong-Yeul Lee, Xiao-Hong Zhu, Sebastian Rupprecht, Michael T Lanagan, Qing X Yang, Wei Chen
In vivo(31)P MRS provides a unique and important imaging tool for studying high-energy phosphate metabolism and bioenergetics noninvasively. However, compared to (1)H MRS, (31)P MRS with a relatively low gyromagnetic ratio (γ) has a lower and limited sensitivity even at ultrahigh field. The proof of concept has been recently demonstrated that the use of high dielectric constant (HDC) materials between RF coil and object sample could increase MRI signal and reduce required RF transmission power for reaching the same RF pulse flip angle in the region of interest...
July 21, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28735256/comparison-of-multimodal-intra-arterial-treatment-versus-intravenous-thrombolysis-for-hypertensive-patients-with-severe-large-vessel-cerebral-infarction
#15
Zuojun Tian, Geng Liao, Shaoming Li, Yuechun Shen, Changbing Chen, Lei Liu, Yiheng Li
Since intravenous thrombolysis (IVT) is often associated with poor outcomes in hypertensive patients with severe acute cerebral infarction (ACI) due to occlusions of the internal carotid, basilar, or proximal middle cerebral artery, we evaluated whether multimodal intra-arterial treatment (IAT) might improve functional outcomes in this patient population. We retrospectively reviewed the charts of eligible patients who underwent multimodal IAT including intra-arterial thrombolysis, mechanical thrombectomy, balloon and/or stent angioplasty (IAT group) or IVT alone (IVT group)...
July 21, 2017: Journal of Investigative Medicine: the Official Publication of the American Federation for Clinical Research
https://www.readbyqxmd.com/read/28730493/magnetic-resonance-spectroscopy-mrs-based-methods-for-examining-cancer-metabolism-in-response-to-oncogenic-kinase-drug-treatment
#16
Yuen-Li Chung
Magnetic resonance spectroscopy (MRS) is an analytical technique that has been extensively used to examine reprogrammed metabolism and treatment response in cancer cells and solid tumors both in vivo and ex vivo. High-resolution MRS (HR-MRS) is one of the best methods for metabolic profiling, as it is highly quantitative, robust, and reproducible. The protocols for dual-phase extraction of cancer cells and tumors and sample preparations for high-resolution (1)H and (31)P HR-MRS analysis are described here. Descriptions of spectra acquisition and analysis are also included in this chapter...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28712992/proton-and-multinuclear-magnetic-resonance-spectroscopy-in-the-human-brain-at-ultra-high-field-strength-a-review
#17
Anke Henning
Magnetic Resonance Spectroscopy (MRS) allows for a non-invasive and non-ionizing determination of in vivo tissue concentrations and metabolic turn-over rates of more than 20 metabolites and compounds in the central nervous system of humans. The aim of this review is to give a comprehensive overview about the advantages, challenges and advances of ultra-high field MRS with regard to methodological development, discoveries and applications from its beginnings around 15 years ago up to the current state. The review is limited to human brain and spinal cord application at field strength of 7T and 9...
July 13, 2017: NeuroImage
https://www.readbyqxmd.com/read/28695243/cns-metabolism-in-high-risk-drug-abuse-insights-gained-from-1-h-31-p-mrs-and-pet
#18
REVIEW
S Bodea
BACKGROUND: High-risk drug consumption is a matter of great concern for public health actors in industrialised countries. The latest trends show a market tendency towards diversification and increasing demand for high-purity synthetic drugs. While most consumers seek medical help after cannabis use, it is high-risk drugs like cocaine, heroin and amphetamines that account for most of the 1000 drug-related deaths that occur in Germany every year. PURPOSE: This article presents the most prominent in vivo cerebral metabolic information in cocaine, heroin and methamphetamine users provided by MRI spectroscopy and PET imaging...
July 10, 2017: Der Radiologe
https://www.readbyqxmd.com/read/28679377/methionyl-trna-synthetase-overexpression-is-associated-with-poor-clinical-outcomes-in-non-small-cell-lung-cancer
#19
Eun Young Kim, Ji Ye Jung, Arum Kim, Kwangsoo Kim, Yoon Soo Chang
BACKGROUND: Methionyl-tRNA synthetase (MRS) plays a critical role in initiating translation by transferring Met to the initiator tRNA (tRNAi(Met)) and protection against ROS-mediated damage, suggesting that its overexpression is related to cancer growth and drug resistance. In this study, the clinical implication of MRS expression in non-small cell lung cancer (NSCLC) was evaluated. METHODS: Immunoblot and immunohistochemical (IHC) analyses were performed using tissue lysates and formalin-fixed paraffin embedded (FFPE) tissue blocks from wild type C57BL/6, LSL-Kras G12D, and LSL-Kras G12D:p53(fl/fl) mice...
July 5, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28667365/a-high-urgency-stroke-code-reduces-in-hospital-delays-in-acute-ischemic-stroke-a-single-centre-experience
#20
Paolo Candelaresi, P Lattuada, C Uggetti, R Daccò, G Fontana, F Frediani
Timely treatment is essential in acute ischemic stroke as the chances of recovery diminish over time, so efforts are necessary to streamline in-hospital pathways and reduce delays. Here, we analyse the interventions to reduce door-to-needle time in stroke patients suitable for intravenous thrombolysis at the Emergency Department of San Carlo Borromeo Hospital, Milan, Italy. All stroke patients consecutively treated with intravenous thrombolysis at our centre from January 1, 2013 to December 31, 2015 were included in this analysis...
June 30, 2017: Neurological Sciences
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