keyword
MENU ▼
Read by QxMD icon Read
search

MRI imaging

keyword
https://www.readbyqxmd.com/read/28637196/chronological-change-of-right-ventricle-by-chronic-intermittent-hypoxia-in-mice
#1
Hyung-Ju Cho, Woon Heo, Jung Woo Han, Yong Hyuk Lee, Jin Myung Park, Min Jung Kang, Joo-Heon Yoon, Min Goo Lee, Chang-Hoon Kim, Joo Young Kim
Study Objective: No studies have investigated sequential changes in the heart on MRI, along with observation of functional lung phenotypes and genetics, over the duration of chronic intermittent hypoxia (CIH). We investigated chronological changes in heart and lung phenotypes after CIH using a mouse model to provide new insights into the pathophysiology of sleep apnea-induced cardiovascular disease. Methods: C57BL/6J adult male mice were randomized to 4 weeks or 8 weeks of CIH...
June 20, 2017: Sleep
https://www.readbyqxmd.com/read/28637110/guidelines-for-cauda-equina-syndrome-red-flags-and-white-flags-systematic-review-and-implications-for-triage
#2
Nicholas V Todd
INTRODUCTION: Patients with cauda equina syndrome (CES) are frequently referred late when neurological damage cannot be reversed. National Guidelines for emergency referral, imaging and treatment of CES contain symptoms and/or signs that are those of late often, irreversible CES. Referral at this stage may be too late for that patient. METHODS: Seven sources were reviewed. Advice re emergency referral/imaging/treatment were reviewed. Symptoms/signs were compared with a standard classification of CES...
March 2, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/28637093/intra-abdominal-cooling-system-limits-ischemia-reperfusion-injury-during-robot-assisted-renal-transplantation
#3
Raphael P H Meier, Vincent Piller, Monika E Hagen, Charles Joliat, Jean-Bernard Buchs, Antonio Nastasi, Raphael Ruttimann, Nicolas C Buchs, Solange Moll, Jean-Paul Vallée, François Lazeyras, Philippe Morel, Leo Bühler
Robot-assisted kidney transplantation is feasible; however, concerns have been raised about possible increases in warm ischemia times. We describe a novel intra-abdominal cooling system to continuously cool the kidney during the procedure. Porcine kidneys were procured by standard open technique. Groups were as follow: Robotic renal transplantation with (n=11) and without (n=6) continuous intra-abdominal cooling and conventional open technique with intermittent 4°C saline cooling (n=6). Renal cortex temperature, magnetic resonance imaging and histology were analyzed...
June 21, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28636879/delineating-neuroinflammation-parasite-cns-invasion-and-blood-brain-barrier-dysfunction-in-an-experimental-murine-model-of-human-african-trypanosomiasis
#4
Jean Rodgers, Barbara Bradley, Peter G E Kennedy
Although Trypanosoma brucei spp. was first detected by Aldo Castellani in CSF samples taken from sleeping sickness patients over a century ago there is still a great deal of debate surrounding the timing, route and effects of transmigration of the parasite from the blood to the CNS. In this investigation, we have applied contrast-enhance magnetic resonance imaging (MRI) to study the effects of trypanosome infection on the blood-brain barrier (BBB) in the well-established GVR35 mouse model of sleeping sickness...
June 18, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28636798/a-ccpe-based-xenon-biosensor-for-magnetic-resonance-imaging-of-claudin-expressing-cells
#5
Anna Piontek, Christopher Witte, Honor May Rose, Miriam Eichner, Jonas Protze, Gerd Krause, Jörg Piontek, Leif Schröder
The majority of malignant tumors originate from epithelial cells, and many of them are characterized by an overexpression of claudins (Cldns) and their mislocalization out of tight junctions. We utilized the C-terminal claudin-binding domain of Clostridium perfringens enterotoxin (cCPE), with its high affinity to specific members of the claudin family, as the targeting unit for a claudin-sensitive cancer biosensor. To overcome the poor sensitivity of conventional relaxivity-based magnetic resonance imaging (MRI) contrast agents, we utilized the superior sensitivity of xenon Hyper-CEST biosensors...
June 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28636566/detection-of-muscle-gap-by-l-bia-in-muscle-injuries-clinical-prognosis
#6
L Nescolarde, J Yanguas, J Terricabras, H Lukaski, X Alomar, J Rosell-Ferrer, G Rodas
Sport-related muscle injury classifications are based basically on imaging criteria such as ultrasound (US) and magnetic resonance imaging (MRI) without consensus because of a lack of clinical prognostics for return-to-play (RTP), which is conditioned upon the severity of the injury, and this in turn with the muscle gap (muscular fibers retraction). Recently, Futbol Club Barcelona's medical department proposed a new muscle injury classification in which muscle gap plays an important role, with the drawback that it is not always possible to identify by MRI...
June 21, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28635614/advanced-treatment-planning-using-direct-4d-optimisation-for-pencil-beam-scanned-particle-therapy
#7
Kinga Bernatowicz, Ye Zhang, Rosalind Lucy Perrin, Damien Charles Weber, Antony John Lomax
We report on development of a new four-dimensional (4D) optimisation approach for scanned proton beams, which incorporates both irregular motion patterns and the delivery dynamics of the treatment machine into the plan optimiser. Furthermore, we assess the effectiveness of this technique to reduce dose to critical structures in proximity to moving targets, while maintaining effective target dose homogeneity and coverage. The proposed approach has been tested using both a simulated phantom and a clinical liver cancer case, and allows for realistic 4D calculations and optimisation using irregular breathing patterns extracted from e...
June 21, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28635568/additional-value-of-magnetic-resonance-targeted-biopsies-to-standard-transrectal-ultrasound-guided-biopsies-for-detection-of-clinically-significant-prostate-cancer
#8
Catrin von Below, Cecilia Wassberg, Mona Norberg, Anna Tolf, Joel Kullberg, Sam Ladjevardi, Michael Häggman, Anna Bill Axelson, Håkan Ahlström
OBJECTIVE: The aim of this study was to evaluate the additional value of magnetic resonance imaging-targeted biopsy (MRI-TB) to standard transrectal ultrasound-guided biopsy (SB) for detection of clinically significant prostate cancer (PCa). An additional aim was to compare the biopsy results to MRI evaluation using a Likert scale. MATERIALS AND METHODS: Patients with newly diagnosed localized PCa (n = 53) by clinical routine SB were prospectively included. The majority of the patients were scheduled for curative therapy before enrollment...
February 24, 2017: Scandinavian Journal of Urology
https://www.readbyqxmd.com/read/28635249/perfluorocarbon-gold-loading-for-non-invasive-in-vivo-assessment-of-bone-fillers-using-19f-magnetic-resonance-imaging-and-computed-tomography
#9
Simone Mastrogiacomo, Weiqiang Dou, Olga Koshkina, Otto C Boerman, John A Jansen, Arend Heerschap, Mangala Srinivas, X Frank Walboomers
Calcium phosphate cement (CPC) is used in bone repair because of its biocompatibility. However, high similarity between CPC and the natural osseous phase results in poor image contrast in most of the available in vivo imaging techniques such as computed tomography (CT) and magnetic resonance imaging (MRI). For accurate identification and localization during and after implantation in vivo, a composition with enhanced image contrast is needed. In this study, we labeled CPC with perfluoro-15-crown-5-ether-loaded (PFCE) poly(latic-co-glycolic acid) nanoparticles (hydrodynamic radius 100 nm) and gold nanoparticles (diameter 40 nm), as 19F MRI and CT contrast agents respectively...
June 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28634696/prominent-midfoot-involvement-in-children-with-enthesitis-related-arthritis-category-of-juvenile-idiopathic-arthritis
#10
Sanat Phatak, Namita Mohindra, Abhishek Zanwar, Amita Aggarwal
Foot involvement is common in juvenile idiopathic arthritis (JIA) but is often unrecognized and difficult to treat. This study was done to assess clinical and radiological involvement of the feet and its impact on function in Indian children with enthesitis-related arthritis (ERA). We enrolled consecutive children with ERA with disease duration of less than 5 years. All patients underwent clinical examination of the feet and filled the juvenile arthritis foot index (JAFI) questionnaire. Ultrasound (US) of foot joints and entheses and extremity magnetic resonance imaging (MRI) scan of one foot were done...
June 20, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28634669/yttrium-90-y-90-resin-microsphere-therapy-for-patients-with-unresectable-hepatocellular-carcinoma-a-single-center-experience
#11
Semra İnce, Bülent Karaman, Engin Alagoz, Nuri Karadurmuş, Hüseyin Şan, Cemal Nuri Erçin, Nuri Arslan
BACKGROUND/AIM: Selective intraarterial radionuclide therapy (SIRT) with yttrium-90 (Y-90) resin microspheres presently has successful results in primary or metastatic inoperable liver tumors. This procedure, which is also known as radioembolisation, delivers high doses of radiation selectively to hepatic tumors while minimum healthy liver exposure. The aim of this study was to present our clinical experience of radiomicrosphere therapy for the treatment of patients with unresectable hepatocellular carcinoma (HCC)...
June 20, 2017: Journal of Gastrointestinal Cancer
https://www.readbyqxmd.com/read/28634624/population-averaged-macaque-brain-atlas-with-high-resolution-ex-vivo-dti-integrated-into-in-vivo-space
#12
Lei Feng, Tina Jeon, Qiaowen Yu, Minhui Ouyang, Qinmu Peng, Virendra Mishra, Mihovil Pletikos, Nenad Sestan, Michael I Miller, Susumu Mori, Steven Hsiao, Shuwei Liu, Hao Huang
Animal models of the rhesus macaque (Macaca mulatta), the most widely used nonhuman primate, have been irreplaceable in neurobiological studies. However, a population-averaged macaque brain diffusion tensor imaging (DTI) atlas, including comprehensive gray and white matter labeling as well as bony and facial landmarks guiding invasive experimental procedures, is not available. The macaque white matter tract pathways and microstructures have been rarely recorded. Here, we established a population-averaged macaque brain atlas with high-resolution ex vivo DTI integrated into in vivo space incorporating bony and facial landmarks, and delineated microstructures and three-dimensional pathways of major white matter tracts in vivo MRI/DTI and ex vivo (postmortem) DTI of ten rhesus macaque brains were acquired...
June 20, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28634618/ct-and-mri-findings-in-focal-eosinophilic-infiltration-of-the-liver
#13
Bao-Liang Guo, Qiu-Gen Hu, Fu-Sheng Ouyang, Bin Zhang, Yu-Hao Dong, Xiao-Ning Luo, Zhou-Yang Lian, Shui-Xing Zhang
OBJECTIVES: To investigate the findings of computed tomography (CT) and magnetic resonance imaging (MRI) of focal eosinophilic infiltration (FEI) of the liver. METHODS: A retrospective study including 29 patients with confirmed FEI of the liver was performed. We evaluated the lesions' number, distribution, size, shape, margin, attenuation or signal intensity characteristics, the enhancement pattern, and some special features. Spearman correlation analysis was used to analyze the correlation between the number of lesions and the eosinophil counts in peripheral blood...
June 20, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28634562/a-simple-bone-cyst-in-cervical-vertebrae-of-an-adolescent-patient
#14
Adriana Bruges Boude, Lina González Vásquez, Fernando Alvarado-Gomez, María Constanza Bedoya, Andrés Rodríguez-Múnera, Luis Carlos Morales-Saenz
INTRODUCTION: Spinal simple bone cysts, also known as solitary cysts, are extremely unusual benign primary bone tumors with few cases reported in the literature. CASE PRESENTATION: Incidental Magnetic Resonance Imaging (MRI) finding of a C2 Simple bone cyst in a 13-year-old female patient is reported. Complementary studies suggested the benign nature of the lesion. Patient underwent cervical curettage followed by tumor excision. A lateral submandibular approach to the upper cervical spine was used and careful bone resection was possible with a radiofrequency assisted burr and no instrumentation or fixation was required...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28634514/cystic-lesions-of-peripheral-nerves-are-we-missing-the-diagnosis-of-the-intraneural-ganglion-cyst
#15
Jyoti Panwar, Anil Mathew, Binu P Thomas
AIM: To highlight the salient magnetic resonance imaging (MRI) features of the intraneural ganglion cyst (INGC) of various peripheral nerves for their precise diagnosis and to differentiate them from other intra and extra-neural cystic lesions. METHODS: A retrospective analysis of the magnetic resonance (MR) images of a cohort of 245 patients presenting with nerve palsy involving different peripheral nerves was done. MR images were analyzed for the presence of a nerve lesion, and if found, it was further characterized as solid or cystic...
May 28, 2017: World Journal of Radiology
https://www.readbyqxmd.com/read/28634513/correlation-of-lumbar-lateral-recess-stenosis-in-magnetic-resonance-imaging-and-clinical-symptoms
#16
Annina Splettstößer, M Fawad Khan, Bernd Zimmermann, Thomas J Vogl, Hanns Ackermann, Marcus Middendorp, Adel Maataoui
AIM: To assess the correlation of lateral recess stenosis (LRS) of lumbar segments L4/5 and L5/S1 and the Oswestry Disability Index (ODI). METHODS: Nine hundred and twenty-seven patients with history of low back pain were included in this uncontrolled study. On magnetic resonance images (MRI) the lateral recesses (LR) at lumbar levels L4/5 and L5/S1 were evaluated and each nerve root was classified into a 4-point grading scale (Grade 0-3) as normal, not deviated, deviated or compressed...
May 28, 2017: World Journal of Radiology
https://www.readbyqxmd.com/read/28634318/evaluation-and-validation-of-the-diagnostic-value-of-the-apparent-diffusion-coefficient-for-differentiating-early-stage-endometrial-carcinomas-from-benign-mimickers-at-3t-mri
#17
Xue Wang, Yu Zhao, Yumin Hu, Yongjin Zhou, Xinjian Ye, Kun Liu, Guanghui Bai, Anna Guo, Meimei Du, Lezhen Jiang, Jinhong Wang, Zhihan Yan
Previous researchers obtained various apparent diffusion coefficient (ADC) cutoff values to differentiate endometrial carcinoma from benign mimickers with 1.5T magnetic resonance imaging (MRI). Few studies have used 3T MRI or validated the effectiveness of these cutoff ADC values prospectively. This study was designed in two stages to obtain a cutoff ADC value at 3T MRI and to validate prospectively the role of the ADC value. First, we conducted a retrospective study of 60 patients to evaluate the diagnostic value of ADC by obtain a theoretical cutoff ADC value for differentiating between benign and malignant endometrial lesions...
June 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28634311/-bevacizumab-related-hyperintense-lesions-on-diffusion-weighted-imaging-at-different-locations-in-a-patient-with-malignant-glioma
#18
Shinya Oshiro, Naoki Wakuta, Shinichi Kawai, Koichi Miki, Yutaka Shigemori
We report the case of a 60-year-old man who first presented with transient difficulty of word recall. Subsequent MRI revealed an invasive brain tumor in the left frontal lobe. The patient underwent open biopsy, and diffuse astrocytoma(WHO grade II)was diagnosed. However, the malignant potential of this tumor was not particularly low because of a few enhancement on preoperative evaluation, and radiation therapy was initially performed. Four months after ending irradiation, temozolomide treatment was introduced for tumor regrowth...
June 2017: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/28634149/a-non-invasive-restraining-system-for-awake-mouse-imaging
#19
Dan Madularu, Axel P Mathieu, Chathura Kumaragamage, Lauren Reynolds, Jamie Near, Cecilia Flores, M Natasha Rajah
BACKGROUND: Preclinical neuroimaging allows for the assessment of brain anatomy, connectivity and function in laboratory animals, such as mice and rats. Most of these studies are performed under anesthesia to avoid movement during the scanning sessions. METHOD: Due to the limitations associated with anesthetized imaging, recent efforts have been made to conduct rodent imaging studies in awake animals, habituated to the restraint systems used in these instances. As of now, only one such system is commercially available for mouse scanning (Animal Imaging Research, Boston, MA, USA) integrating the radiofrequency coil electronics with the restraining element, an approach which, although effective in reducing head motion during awake imaging, has some limitations...
June 17, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28634109/cannabis-associated-psychosis-neural-substrate-and-clinical-impact
#20
REVIEW
R M Murray, A Englund, A Abi-Dargham, D Lewis, M Di Forti, C Davies, M Sherif, P McGuire, C D'Souza
Prospective epidemiological studies have consistently demonstrated that cannabis use is associated with an increased subsequent risk of both psychotic symptoms and schizophrenia-like psychoses. Early onset of use, daily use of high-potency cannabis, and synthetic cannabinoids carry the greatest risk. The risk-increasing effects are not explained by shared genetic predisposition between schizophrenia and cannabis use. Experimental studies in healthy humans show that cannabis and its active ingredient, delta-9-tetrahydrocannabinol (THC), can produce transient, dose-dependent, psychotic symptoms, as well as an array of psychosis-relevant behavioral, cognitive and psychophysiological effects; the psychotogenic effects can be ameliorated by cannabidiol (CBD)...
June 17, 2017: Neuropharmacology
keyword
keyword
117815
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"