keyword
MENU ▼
Read by QxMD icon Read
search

MR

keyword
https://www.readbyqxmd.com/read/28822094/quantitative-knee-cartilage-measurement-at-mr-imaging-of-patients-with-anterior-cruciate-ligament-tear
#1
Kazuki Kato, Tamotsu Kamishima, Eiji Kondo, Tomohiro Onodera, Shota Ichikawa
In previous studies, numerous approaches were proposed that assess knee cartilage volume quantitatively using 3D magnetic resonance (MR) imaging. However, the clinical use of these approaches is limited because 3D MR is prone to metal artifacts in postoperative cases. Our purpose in this study was to validate a method for knee cartilage volume quantification using conventional MR imaging in patients who underwent anterior cruciate ligament (ACL) reconstruction surgery. The study included 16 patients who underwent MR imaging before and 1 year after ACL reconstruction surgery...
August 18, 2017: Radiological Physics and Technology
https://www.readbyqxmd.com/read/28822038/translocator-protein-pet-imaging-in-a-preclinical-prostate-cancer-model
#2
Mohammed N Tantawy, H Charles Manning, Todd E Peterson, Daniel C Colvin, John C Gore, Wenfu Lu, Zhenbang Chen, C Chad Quarles
PURPOSE: The identification and targeting of biomarkers specific to prostate cancer (PCa) could improve its detection. Given the high expression of translocator protein (TSPO) in PCa, we investigated the use of [(18)F]VUIIS1008 (a novel TSPO-targeting radioligand) coupled with positron emission tomography (PET) to identify PCa in mice and to characterize their TSPO uptake. PROCEDURES: Pten(pc-/-), Trp53(pc-/-) prostate cancer-bearing mice (n = 9, 4-6 months old) were imaged in a 7T MRI scanner for lesion localization...
August 18, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/28821978/assessment-of-paraspinal-neurogenic-tumors-with-diffusion-weighted-mr-imaging
#3
Ahmed Abdel Khalek Abdel Razek, Germeen Albair Ashmalla
PURPOSE: To assess paraspinal neurogenic tumors with diffusion-weighted MR imaging. METHODS: Retrospective analysis was done upon 34 patients with paraspinal neurogenic tumors that underwent diffusion-weighted MR imaging. The ADC values of the mediastinal neurogenic tumors were calculated and correlated with biopsy results. RESULTS: The ADC of benign paraspinal neurogenic tumors (1.5 ± 0.28 × 10(-3) mm(2)/s) was significantly higher (P = 0...
August 18, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28821974/mri-histogram-analysis-enables-objective-and-continuous-classification-of-intervertebral-disc-degeneration
#4
Christian Waldenberg, Hanna Hebelka, Helena Brisby, Kerstin Magdalena Lagerstrand
PURPOSE: Magnetic resonance imaging (MRI) is the best diagnostic imaging method for low back pain. However, the technique is currently not utilized in its full capacity, often failing to depict painful intervertebral discs (IVDs), potentially due to the rough degeneration classification system used clinically today. MR image histograms, which reflect the IVD heterogeneity, may offer sensitive imaging biomarkers for IVD degeneration classification. This study investigates the feasibility of using histogram analysis as means of objective and continuous grading of IVD degeneration...
August 18, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28821875/convenient-and-effective-icgylation-of-magnetic-nanoparticles-for-biomedical-applications
#5
Hye Sun Park, Jongwoo Kim, Mi Young Cho, Hyunseung Lee, Sang Hwan Nam, Yung Doug Suh, Kwan Soo Hong
Nanoprobes used for biomedical applications usually require surface modifications with amphiphilic surfactants or inorganic coating materials to enhance their biocompatibility. We proposed a facile synthetic approach for the phase transfer of hydrophobic magnetic nanoparticles by the direct adherence of fluorescent probes, without any chemical modifications, for use as a magnetic resonance (MR)/near-infrared (NIR) fluorescence bimodal imaging contrast agent. Indocyanine green (ICG) was used not only as an optical component for NIR imaging, but also as a surfactant for phase transfer with no superfluous moiety: we therefore called the process "ICGylation"...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821713/evaluating-the-causal-relation-of-apoa-iv-with-disease-related-traits-a-bidirectional-two-sample-mendelian-randomization-study
#6
Salome Mack, Stefan Coassin, Julien Vaucher, Florian Kronenberg, Claudia Lamina
Apolipoprotein A-IV (apoA-IV) has been observed to be associated with lipids, kidney function, adiposity- and diabetes-related parameters. To assess the causal relationship of apoA-IV with these phenotypes, we conducted bidirectional Mendelian randomization (MR) analyses using publicly available summary-level datasets from GWAS consortia on apoA-IV concentrations (n = 13,813), kidney function (estimated glomerular filtration rate (eGFR), n = 133,413), lipid traits (HDL cholesterol, LDL cholesterol, triglycerides, n = 188,577), adiposity-related traits (body-mass-index (n = 322,206), waist-hip-ratio (n = 210,088)) and fasting glucose (n = 133,010)...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28820837/non-contrast-mr-lymphography-for-evaluation-of-lymph-node-transfer-for-secondary-upper-limb-lymphedema
#7
Lionel Arrivé, Sarah Derhy, Chrif Dlimi, Sanaa El Mouhadi, Laurence Monnier-Cholley, Corinne Becker
BACKGROUND: Our purpose was to evaluate the results of axillary lymph node transplantation (LNT) with non-contrast magnetic resonance (MR) lymphography in 15 patients with secondary upper limb lymphedema. METHODS: Fifteen female patients with lymphedema following breast cancer treatment underwent LNT. Non-contrast MR lymphography was obtained with a free-breathing 3D fast spin-echo sequence. Images analysis criteria included: (A) before surgery: a) severity of lymphedema graded as absent, mild, moderate, and severe; b) involvement of the muscular compartment; c) distal dilated lymphatic vessels; (B) after surgery: a) visualization of site of transplantation; b) visualization of transplanted lymph nodes; c) severity of lymphedema with regard to pretransplantation severity (i...
August 8, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28820653/fibrous-skeleton-of-the-heart-anatomic-overview-and-evaluation-of-pathologic-conditions-with-ct-and-mr-imaging
#8
Farhood Saremi, Damián Sánchez-Quintana, Shumpei Mori, Horia Muresian, Diane E Spicer, Cameron Hassani, Robert H Anderson
The fibrous skeleton is concentrated at the base of the ventricular mass. It provides electrical insulation at the atrioventricular level and fibrous continuity for the leaflets of the mitral, aortic, and tricuspid valves. Its components include the fibrous trigones, the fibrous area of aortic-mitral continuity, the subvalvar collar of the mitral valve, the membranous septum, the interleaflet triangles, the tendon of Todaro, and likely the conus ligament. The majority of the mitral annulus is fibrous, but the only true fibrous part of the tricuspid annulus is where the valvar leaflets are attached to the central fibrous body...
August 18, 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28820558/young-patient-with-advanced-heart-failure-no-longer-a-candidate-for-heart-transplantation-after-mitraclip%C3%A3-%C3%A2-procedure
#9
Cosmo Godino, Andrea Scotti, Eustachio Agricola, Carlo A Pivato, Mauro Chiarito, Stefano Stella, Massimo Maccherini, Alberto Margonato, Antonio Colombo
In Europe, mitral regurgitation (MR) is the second most common form of valvular heart disease requiring surgical treatment. The case is presented of a 36-year-old woman with end-stage heart failure secondary to chemotherapy-induced cardiotoxicity, complicated by severe MR. She was listed for heart transplantation and underwent percutaneous MitraClip® implantation in order to preclude further clinical deterioration while awaiting a suitable donor. The one-year follow-up showed a strong improvement of symptoms and mostly reverse left ventricular remodelling, with consequent removal from the heart transplantation list...
March 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28820545/assessment-and-management-of-acute-severe-mitral-regurgitation-in-the-intensive-care-unit
#10
Marina Leitman, Vladimir Tyomkin, Ehud Raanani, Ram Sharony, Ludmila Tzatskin, Eli Peleg, Alex Blatt, Zvi Vered
BACKGROUND: Acute severe mitral regurgitation (MR) is a serious medical condition. Whilst clear guidelines exist regarding the management of chronic MR, acute severe MR is usually treated on an individual basis. Currently, few data exist regarding acute MR in the era of primary coronary interventions (PCI). The present study included patients admitted to the Department of Cardiology during recent years with acute severe MR of different etiologies, and an analysis of these data in the light of previous investigations...
March 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28820494/immune-response-patterns-and-next-generation-sequencing-diagnostics-for-the-detection-of-mycoses-in-patients-with-septic-shock-results-of-a-combined-clinical-and-experimental-investigation
#11
Sebastian O Decker, Annette Sigl, Christian Grumaz, Philip Stevens, Yevhen Vainshtein, Stefan Zimmermann, Markus A Weigand, Stefan Hofer, Kai Sohn, Thorsten Brenner
Fungi are of increasing importance in sepsis. However, culture-based diagnostic procedures are associated with relevant weaknesses. Therefore, culture- and next-generation sequencing (NGS)-based fungal findings as well as corresponding plasma levels of β-d-glucan, interferon gamma (INF-γ), tumor necrosis factor alpha (TNF-α), interleukin (IL)-2, -4, -6, -10, -17A, and mid-regional proadrenomedullin (MR-proADM) were evaluated in 50 septic patients at six consecutive time points within 28 days after sepsis onset...
August 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28820309/advanced-cone-beam-ct-venous-angiographic-imaging
#12
Visish M Srinivasan, Gouthami Chintalapani, Edward A M Duckworth, Peter Kan
OBJECTIVE The evaluation of the venous neurovasculature, especially the dural venous sinuses, is most often performed using MR or CT venography. For further assessment, diagnostic cerebral angiography may be performed. Three-dimensional rotational angiography (3D-RA) can be applied to the venous system, producing 3D rotational venography (3D-RV) and cross-sectional reconstructions, which function as an adjunct to traditional 2D digital subtraction angiography. METHODS After querying the database of Baylor St...
August 18, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28819171/thyroid-function-and-ischemic-heart-disease-a-mendelian-randomization-study
#13
Jie V Zhao, C Mary Schooling
To clarify the role of thyroid function in ischemic heart disease (IHD) we assessed IHD risk and risk factors according to genetically predicted thyroid stimulating hormone (TSH), free thyroxine (FT4) and thyroid peroxidase antibody (TPOAb) positivity. Separate-sample instrumental variable analysis with genetic instruments (Mendelian randomization) was used in an extensively genotyped case (n = 64,374)-control (n = 130,681) study, CARDIoGRAMplusC4D. Associations with lipids, diabetes and adiposity were assessed using the Global Lipids Genetics Consortium Results (n = 196,475), the DIAbetes Genetics Replication And Meta-analysis case (n = 34,380)-control (n = 114,981) study, and the Genetic Investigation of ANthropometric Traits (body mass index in 152,893 men and 171,977 women, waist-hip ratio in 93,480 men and 116,741 women)...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819140/enhancement-of-perivascular-spaces-in-7%C3%A2-t-mr-image-using-haar-transform-of-non-local-cubes-and-block-matching-filtering
#14
Yingkun Hou, Sang Hyun Park, Qian Wang, Jun Zhang, Xiaopeng Zong, Weili Lin, Dinggang Shen
Perivascular spaces (PVSs) in brain have a close relationship with typical neurological diseases. The quantitative studies of PVSs are meaningful but usually difficult, due to their thin and weak signals and also background noise in the 7 T brain magnetic resonance images (MRI). To clearly distinguish the PVSs in the 7 T MRI, we propose a novel PVS enhancement method based on the Haar transform of non-local cubes. Specifically, we extract a certain number of cubes from a small neighbor to form a cube group, and then perform Haar transform on each cube group...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819086/measurement-of-cerebrospinal-fluid-flow-dynamics-using-phase-contrast-mr-imaging-with-bilateral-jugular-vein-compression-a-feasibility-study-in-healthy-volunteers
#15
Shintaro Ichikawa, Utaroh Motosugi, Akihiro Okumura, Tatsuya Shimizu, Hiroshi Onishi
We measured the changes in the cerebrospinal fluid (CSF) flow dynamics after compression of the bilateral jugular veins using phase contrast-magnetic resonance imaging (PC-MRI). PC-MRI was performed in 10 healthy male volunteers using a 3T clinical scanner with a two-dimensional gradient echo sequence. We successfully measured the changes in CSF flow velocity using PC-MRI with and without compression of the bilateral jugular veins. The relative velocity range decreased by about 30% when the bilateral jugular veins were compressed...
August 16, 2017: Magnetic Resonance in Medical Sciences: MRMS
https://www.readbyqxmd.com/read/28819084/the-significance-of-lactate-and-lipid-peaks-for-predicting-primary-neuroepithelial-tumor-grade-with-proton-mr-spectroscopy
#16
Hisao Nakamura, Masatomo Doi, Takuya Suzuki, Yasuyuki Yoshida, Masahiro Hoshikawa, Masashi Uchida, Yuichiro Tanaka, Masayuki Takagi, Yasuo Nakajima
PURPOSE: (1)H-MRS is a non-invasive technique used to assess the metabolic activity of brain tumors. The technique is useful for the preoperative prediction of tumor grade, which is important for treatment planning and accurate prognosis. We used (1)H-MRS to study the lactate peak, which appears in various conditions, including hyperglycemia, ischemia, and hypoxia and lipid peak, which is associated with necrotic cells. The purpose of this study was to retrospectively examine the frequency and significance of lactate and lipid peaks in relation to brain tumor grade...
August 16, 2017: Magnetic Resonance in Medical Sciences: MRMS
https://www.readbyqxmd.com/read/28818991/immune-modulation-therapy-and-imaging-workshop-report
#17
Anthony F Shields, Paula Jacobs, Mario Sznol, Michael M Graham, Ronald Germain, Lawrence Lum, Elaine Jaffee, Elisabeth G E de Vries, Sridhar Nimmagadda, Annick D Van den Abbeele, David Leung, Anna M Wu, Elad Sharon, Lalitha K Shankar
A workshop at the National Cancer Institute May 2, 2016 considered the current state of imaging in assessment of immunotherapy. Immunotherapy has shown some remarkable and prolonged responses in the treatment of tumors. However, responses are variable and frequently delayed, complicating the evaluation of new immunotherapy agents and customizing treatment for individual patients. Early anatomic imaging may show that a tumor has increased in size, but this could represent pseudoprogression. Based on imaging, clinicians must decide if they should stop, pause, or continue treatment...
August 17, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28818826/test-retest-and-interreader-reproducibility-of-semiautomated-atlas-based-analysis-of-diffusion-tensor-imaging-data-in-acute-cervical-spine-trauma-in-adult-patients
#18
D J Peterson, A M Rutman, D S Hippe, J G Jarvik, F H Chokshi, M R Reyes, C H Bombardier, M Mossa-Basha
BACKGROUND AND PURPOSE: DTI is a tool for microstructural spinal cord injury evaluation. This study evaluated the reproducibility of a semiautomated segmentation algorithm of spinal cord DTI. MATERIALS AND METHODS: Forty-two consecutive patients undergoing acute trauma cervical spine MR imaging underwent 2 axial DTI scans in addition to their clinical scan. The datasets were put through a semiautomated probabilistic segmentation algorithm that selected white matter, gray matter, and 24 individual white matter tracts...
August 17, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28818825/mr-imaging-features-of-the-cerebellum-in-adult-onset-neuronal-intranuclear-inclusion-disease-8-cases
#19
A Sugiyama, N Sato, Y Kimura, T Maekawa, M Enokizono, Y Saito, Y Takahashi, H Matsuda, S Kuwabara
Neuronal intranuclear inclusion disease is a neurodegenerative disorder pathologically characterized by eosinophilic hyaline intranuclear inclusions. A high-intensity signal along the corticomedullary junction on DWI has been described as a specific MR imaging finding of the cerebrum in neuronal intranuclear inclusion disease. However, MR imaging findings of the cerebellum in neuronal intranuclear inclusion disease have not been fully evaluated. Here, we review MR imaging findings of the cerebellum in a series of 8 patients with pathologically confirmed neuronal intranuclear inclusion disease...
August 17, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28818763/the-qualitative-and-quantitative-image-analysis-of-mr-imaging-in-patients-with-acute-on-chronic-liver-failure
#20
Tae Wook Kang, Mimi Kim, Young Kon Kim, Seong Hyun Kim, Dong Hyun Sinn, Kyunga Kim
PURPOSE: To evaluate the distinctive features of ACLF and chronic liver disease (CLD) on MR images using quantitative and qualitative analyses. METHODS: Twelve patients with ACLF and 36 patients with CLD who had undergone MR images were included. MR imaging findings from both groups were assessed. RESULTS: Gallbladder edema, esophageal varix, and ascites were significantly more prevalent in the ACLF group (all P-values <0.05). The liver to muscle SI ratio on T2-WI was significantly higher in the ACLF group (P=0...
August 10, 2017: Clinical Imaging
keyword
keyword
9129
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"