keyword
MENU ▼
Read by QxMD icon Read
search

PET MRI

keyword
https://www.readbyqxmd.com/read/28209905/diagnostic-value-of-18-f-fdg-pet-ct-versus-mri-in-the-setting-of-antibody-specific-autoimmune-encephalitis
#1
Lilja B Solnes, Krystyna M Jones, Steven P Rowe, Puskar Pattanayak, Abhinav Nalluri, Arun Venkatesan, John C Probasco, Mehrbod Som Javadi
Introduction: Diagnosis of autoimmune encephalitis presents some challenges in the clinical setting due to varied clinical presentations and delay in obtaining antibody panel results. We examined the role of neuroimaging in the setting of autoimmune encephalitides comparing the utility (18)F-FDG PET/CT versus conventional brain imaging with MRI. Methods: A retrospective study was performed assessing the positivity rate of MRI versus (18)F-FDG PET/CT during the initial work-up of 23 patients proven to have antibody positive autoimmune encephalitis...
February 16, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28209582/noninvasive-evaluation-of-cbf-and-perfusion-delay-of-moyamoya-disease-using-arterial-spin-labeling-mri-with-multiple-postlabeling-delays-comparison-with-15-o-gas-pet-and-dsc-mri
#2
S Hara, Y Tanaka, Y Ueda, S Hayashi, M Inaji, K Ishiwata, K Ishii, T Maehara, T Nariai
BACKGROUND AND PURPOSE: Arterial spin-labeling MR imaging with multiple postlabeling delays has a potential to evaluate various hemodynamic parameters. To clarify whether arterial spin-labeling MR imaging can identify CBF and perfusion delay in patients with Moyamoya disease, we compared arterial spin-labeling, DSC, and (15)O-gas PET in terms of their ability to identify these parameters. MATERIALS AND METHODS: Eighteen patients with Moyamoya disease (5 men, 13 women; ages, 21-55 years) were retrospectively analyzed...
February 16, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28209330/role-of-magnetic-resonance-imaging-in-detection-of-pathologic-complete-remission-in-breast-cancer-patients-treated-with-neoadjuvant-chemotherapy-a-meta-analysis
#3
REVIEW
Yan-Lin Gu, Si-Meng Pan, Jie Ren, Zhi-Xue Yang, Guo-Qin Jiang
Pathologic complete remission after neoadjuvant chemotherapy has a role in guiding the management of breast cancer. The present meta-analysis examined the accuracy of contrast-enhanced magnetic resonance imaging (CE-MRI) and diffusion-weighted magnetic resonance imaging (DW-MRI) in detecting the response to neoadjuvant chemotherapy and compared CE-MRI with ultrasonography, mammography, and positron emission tomography/computed tomography (PET/CT). Medical subject heading terms and related keywords were searched to generate a compilation of eligible studies...
January 11, 2017: Clinical Breast Cancer
https://www.readbyqxmd.com/read/28207200/a-pet-guided-framework-supports-a-multiple-arterial-input-functions-approach-in-dsc-mri-in-acute-stroke
#4
Michelle Livne, Vince I Madai, Peter Brunecker, Olivier Zaro-Weber, Walter Moeller-Hartmann, Wolf-Dieter Heiss, Kim Mouridsen, Jan Sobesky
BACKGROUND AND PURPOSE: In acute stroke, arterial-input-function (AIF) determination is essential for obtaining perfusion estimates with dynamic susceptibility-weighted contrast-enhanced magnetic resonance imaging (DSC-MRI). Standard DSC-MRI postprocessing applies single AIF selection, ie, global AIF. Physiological considerations, however, suggest that a multiple AIFs selection method would improve perfusion estimates to detect penumbral flow. In this study, we developed a framework based on comparable DSC-MRI and positron emission tomography (PET) images to compare the two AIF selection approaches and assess their performance in penumbral flow detection in acute stroke...
February 16, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28202379/comprehensive-preoperative-work-up-and-surgical-treatment-of-low-grade-tumor-benign-lesion-related-temporal-lobe-epilepsy
#5
Rui Feng, Jie Hu, Jinsong Wu, Liqin Lang, Chengxin Ma, Shize Jiang, Bing Sun, Xin Gu, Li Pan
OBJECTIVE: Generally low-grade tumor/benign lesion related temporal lobe epilepsy (LGT/BL-TLE) is considered easier to treat and has better prognosis when compared to non-lesional TLE. However, multiple disputes exist in surgical management of this epilepsy entity. This study aims to discuss comprehensive preoperative work-up, surgical strategies and outcome of it. METHODS: A retrospective review of sixty LGT/BL-TLE cases which underwent comprehensive preoperative work-up and then resective surgeries was conducted...
February 12, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28199371/the-value-of-resting-state-functional-magnetic-resonance-imaging-for-detecting-epileptogenic-zones-in-patients-with-focal-epilepsy
#6
Zhijuan Chen, Yang An, Bofeng Zhao, Weidong Yang, Qing Yu, Li Cai, Hongyan Ni, Jianzhong Yin
OBJECTIVE: To determine the value of resting-state functional magnetic resonance imaging (RS-fMRI) based on the local analysis methods regional homogeneity (ReHo), amplitude of low-frequency fluctuations (ALFF), and fractional ALFF (fALFF), for detecting epileptogenic zones (EZs). METHODS: A total of 42 consecutive patients with focal epilepsy were enrolled. Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of visually assessed RS-fMRI, MRI, magnetic resonance spectroscopy (MRS), video electroencephalography (VEEG), and positron-emission tomography computed tomography (PET-CT) in EZ localization were evaluated to assess their diagnostic abilities...
2017: PloS One
https://www.readbyqxmd.com/read/28199138/pediatric-neuroendocrine-carcinoid-tumors-review-of-diagnostic-imaging-findings-and-recent-advances
#7
Andrew J Degnan, Sameh S Tadros, Shannon Tocchio
OBJECTIVE: Although rare, pediatric neuroendocrine tumors including carcinoid tumor have increased in incidence over the past few decades. Despite increased recognition, survival rates have not significantly improved. Earlier detection of these tumors is necessary to improve clinical outcomes. This article discusses imaging approaches for detecting pediatric carcinoid tumors including anatomic imaging methods such as CT and MRI as well as functional imaging methods targeting the somatostatin receptor including (111)In-labeled octreotide and newer (68)Ga-based radiotracers that may hold promise in hybrid PET/CT or PET/MRI...
February 15, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28197685/test-retest-measurements-of-dopamine-d1-type-receptors-using-simultaneous-pet-mri-imaging
#8
Simon Kaller, Michael Rullmann, Marianne Patt, Georg-Alexander Becker, Julia Luthardt, Johanna Girbardt, Philipp M Meyer, Peter Werner, Henryk Barthel, Anke Bresch, Thomas H Fritz, Swen Hesse, Osama Sabri
PURPOSE: The role of dopamine D1-type receptor (D1R)-expressing neurons in the regulation of motivated behavior and reward prediction has not yet been fully established. As a prerequisite for future research assessing D1-mediated neuronal network regulation using simultaneous PET/MRI and D1R-selective [(11)C]SCH23390, this study investigated the stability of central D1R measurements between two independent PET/MRI sessions under baseline conditions. METHODS: Thirteen healthy volunteers (7 female, age 33 ± 13 yrs) underwent 90-min emission scans, each after 90-s bolus injection of 486 ± 16 MBq [(11)C]SCH23390, on two separate days within 2-4 weeks using a PET/MRI system...
February 14, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28197351/a-case-of-malignant-melanoma-of-the-uterine-cervix-with-disseminated-metastases-throughout-the-vaginal-wall
#9
Tomoko Noguchi, Nami Ota, Yasushi Mabuchi, Shigetaka Yagi, Sawako Minami, Hisako Okuhira, Yuki Yamamoto, Yasushi Nakamura, Kazuhiko Ino
Malignant melanoma (MM) in the female genital tract accounts for less than 2% of all melanomas, and the vast majority associated occur in the vulva and vagina. Primary MM of the uterine cervix is extremely rare and its prognosis is very poor. We report a case of primary MM of the cervix with dissemination throughout the vaginal wall. A 66-year-old woman presented with postmenopausal bleeding. Gynecologic examination demonstrated a 2 cm polypoid blackish-pigmented tumor on the cervix with multiple small blackish-pigmented lesions throughout the vaginal wall...
2017: Case Reports in Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28195913/glucose-hypometabolism-in-developmental-venous-anomaly-without-apparent-parenchymal-damage
#10
Masamichi Imai, Mika Tanaka, Kenji Ishibashi, Aya Tokumaru, Kenji Ishii
Two cases of F-FDG PET in developmental venous anomaly (DVA) with visual impairment were examined. Plain MRI could not determine the cause of visual symptoms; a contrast-enhanced CT scan showed the existence of DVA without apparent parenchymal damage due to infarction or hemorrhage. F-FDG PET revealed that the hypometabolic area extended to the visual tract, thus explaining the association between the visual impairment and DVA. F-FDG PET is therefore a useful tool for the evaluation of symptomatic DVA.
February 13, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28195901/prognostic-molecular-and-imaging-biomarkers-in-primary-glioblastoma
#11
Edit Bosnyák, Sharon K Michelhaugh, Neil V Klinger, David O Kamson, Geoffrey R Barger, Sandeep Mittal, Csaba Juhász
PURPOSE: Several molecular glioma markers (including isocitrate dehydrogenase 1 [IDH1] mutation, amplification of the epidermal growth factor receptor [EGFR], and methylation of the O6-methylguanine-DNA methyltransferase [MGMT] promoter) have been associated with glioblastoma survival. In this study, we examined the association between tumoral amino acid uptake, molecular markers, and overall survival in patients with IDH1 wild-type (primary) glioblastoma. PATIENTS AND METHODS: Twenty-one patients with newly diagnosed IDH1 wild-type glioblastomas underwent presurgical MRI and PET scanning with alpha[C-11]-L-methyl-tryptophan (AMT)...
February 14, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28194632/characterization-of-an-orthotopic-colorectal-cancer-mouse-model-and-its-feasibility-for-accurate-quantification-in-positron-emission-tomography
#12
Sara Rapic, Christel Vangestel, Jeroen Verhaeghe, Tim Van den Wyngaert, Rukun Hinz, Marleen Verhoye, Patrick Pauwels, Steven Staelens, Sigrid Stroobants
PURPOSE: Quantification in positron emission tomography (PET) imaging of an orthotopic mouse model of colorectal cancer (CRC) is challenging due to difficult tumor delineation. We aimed to establish a reproducible delineation approach, evaluate its feasibility for reliable PET quantification and compare its added translational value with its subcutaneous counterpart. PROCEDURES: A subcutaneous Colo205-luc2 tumor fragment harvested from a donor mouse was transplanted onto the caecum of nude mice, with (n = 10) or without (n = 10) the addition of an X-ray detectable thread...
February 13, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/28194132/molecular-imaging-markers-to-track-huntington-s-disease-pathology
#13
REVIEW
Heather Wilson, Rosa De Micco, Flavia Niccolini, Marios Politis
Huntington's disease (HD) is a progressive, monogenic dominant neurodegenerative disorder caused by repeat expansion mutation in the huntingtin gene. The accumulation of mutant huntingtin protein, forming intranuclear inclusions, subsequently leads to degeneration of medium spiny neurons in the striatum and cortical areas. Genetic testing can identify HD gene carriers before individuals develop overt cognitive, psychiatric, and chorea symptoms. Thus, HD gene carriers can be studied in premanifest stages to understand and track the evolution of HD pathology...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28193868/dopamine-in-the-medial-amygdala-network-mediates-human-bonding
#14
Shir Atzil, Alexandra Touroutoglou, Tali Rudy, Stephanie Salcedo, Ruth Feldman, Jacob M Hooker, Bradford C Dickerson, Ciprian Catana, Lisa Feldman Barrett
Research in humans and nonhuman animals indicates that social affiliation, and particularly maternal bonding, depends on reward circuitry. Although numerous mechanistic studies in rodents demonstrated that maternal bonding depends on striatal dopamine transmission, the neurochemistry supporting maternal behavior in humans has not been described so far. In this study, we tested the role of central dopamine in human bonding. We applied a combined functional MRI-PET scanner to simultaneously probe mothers' dopamine responses to their infants and the connectivity between the nucleus accumbens (NAcc), the amygdala, and the medial prefrontal cortex (mPFC), which form an intrinsic network (referred to as the "medial amygdala network") that supports social functioning...
February 13, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28192624/mr-based-synthetic-ct-generation-using-a-deep-convolutional-neural-network-method
#15
Xiao Han
PURPOSE: Interests have been rapidly growing in the field of radiotherapy to replace CT with magnetic resonance imaging (MRI), due to superior soft tissue contrast offered by MRI and the desire to reduce unnecessary radiation dose. MR-only radiotherapy also simplifies clinical workflow and avoids uncertainties in aligning MR with CT. Methods, however, are needed to derive CT-equivalent representations, often known as synthetic CT (sCT), from patient MR images for the purpose of dose calculation and DRR-based patient positioning...
February 13, 2017: Medical Physics
https://www.readbyqxmd.com/read/28188304/-18-f-fdg-pet-patterns-of-surgical-success-and-failure-in-mesial-temporal-lobe-epilepsy
#16
Francine Chassoux, Eric Artiges, Franck Semah, Agathe Laurent, Elisabeth Landré, Baris Turak, Philippe Gervais, Badia-Ourkia Helal, Bertrand Devaux
OBJECTIVE: To search for [(18)F]-fluorodeoxyglucose (FDG)-PET patterns predictive of long-term prognosis in surgery for drug-resistant mesial temporal lobe epilepsy (MTLE) due to hippocampal sclerosis (HS). METHODS: We analyzed metabolic data with [(18)F]-FDG-PET in 97 patients with MTLE (53 female participants; age range 15-56 years) with unilateral HS (50 left) and compared the metabolic patterns, electroclinical features, and structural atrophy on MRI in patients with the best outcome after anteromesial temporal resection (Engel class IA, completely seizure-free) to those with a non-IA outcome, including suboptimal outcome and failure...
February 10, 2017: Neurology
https://www.readbyqxmd.com/read/28185231/erratum-to-image-fusion-between-18f-fdg-pet-and-mri-in-cardiac-sarcoidosis-a-case-series
#17
Shahin Zandieh, Reinhard Bernt, Siroos Mirzaei, Joerg Haller, Klaus Hergan, Christian Pirich
No abstract text is available yet for this article.
February 9, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28184160/tunable-and-noncytotoxic-pet-spect-mri-multimodality-imaging-probes-using-colloidally-stable-ligand-free-superparamagnetic-iron-oxide-nanoparticles
#18
Th Nguyen Pham, Nigel A Lengkeek, Ivan Greguric, Byung J Kim, Paul A Pellegrini, Stephanie A Bickley, Marcel R Tanudji, Stephen K Jones, Brian S Hawkett, Binh Tt Pham
Physiologically stable multimodality imaging probes for positron emission tomography/single-photon emission computed tomography (PET/SPECT)-magnetic resonance imaging (MRI) were synthesized using the superparamagnetic maghemite iron oxide (γ-Fe2O3) nanoparticles (SPIONs). The SPIONs were sterically stabilized with a finely tuned mixture of diblock copolymers with either methoxypolyethylene glycol (MPEG) or primary amine NH2 end groups. The radioisotope for PET or SPECT imaging was incorporated with the SPIONs at high temperature...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28183994/optimal-reference-region-to-measure-longitudinal-amyloid-beta-change-with-18-f-florbetaben-pet
#19
Santiago Bullich, Victor L Villemagne, Ana M Catafau, Aleksandar Jovalekic, Norman Koglin, Christopher C Rowe, Susan De Santi
Accurate measurement of changes in amyloid-beta (Aβ) deposition over time is important in longitudinal studies, particularly in anti-Aβ therapeutic trials. To achieve this, the optimal reference region (RR) must be selected to reduce variance of Aβ positron emission tomography (PET) measurements, allowing early detection of treatment efficacy. The aim of this study was to determine the RR that allows earlier detection of subtle Aβ changes using (18)F florbetaben (FBB) PET. Methods: Forty-five patients with mild cognitive impairment (MCI) (72...
February 9, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28183987/in-vivo-hypoxia-pet-imaging-quantifies-the-severity-of-arthritic-joint-inflammation-in-line-with-overexpression-of-hif-and-enhanced-ros-generation
#20
Kerstin Fuchs, Anna Kuehn, Moritz Mahling, Philipp Guenthoer, Andreas Hector, Dominik Hartl, Stefan Laufer, Ursula Kohlhofer, Leticia Quintanilla-Martinez, Gerald Reischl, Martin Röcken, Bernd J Pichler, Manfred Kneilling
Hypoxia is essential for the development of autoimmune diseases such as rheumatoid arthritis (RA) and is associated with the expression of reactive oxygen species (ROS), due to enhanced infiltration of immune cells. The aim of this study was to demonstrate the feasibility of measuring hypoxia non-invasively in vivo in arthritic ankles with positron emission tomography (PET)/magnetic resonance imaging (MRI) using the hypoxia tracers (18)F-fluoromisonidazole (FMISO) and (18)F-fluoroazomycinarabinoside (FAZA)...
February 9, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
keyword
keyword
64131
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"