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https://www.readbyqxmd.com/read/29230507/evidence-for-regional-hippocampal-damage-in-patients-with-schizophrenia
#1
Sadhana Singh, Subash Khushu, Pawan Kumar, Satnam Goyal, Triptish Bhatia, Smita N Deshpande
PURPOSE: Schizophrenia patients show cognitive and mood impairments, including memory loss and depression, suggesting damage in the brain regions. The hippocampus is a brain structure that is significantly involved in memory and mood function and shows impairment in schizophrenia. In the present study, we examined the regional hippocampal changes in schizophrenia patients using voxel-based morphometry (VBM), Freesurfer, and proton magnetic resonance spectroscopy (1H MRS) procedures. METHODS: 1H MRS and high-resolution T1-weighted magnetic resonance imaging were collected in both healthy control subjects (N = 28) and schizophrenia patients (N = 28) using 3-Tesla whole body MRI system...
December 11, 2017: Neuroradiology
https://www.readbyqxmd.com/read/29222688/comparison-of-qualitative-and-quantitative-ct-and-mri-parameters-for-monitoring-of-longitudinal-spine-involvement-in-patients-with-multiple-myeloma
#2
M Horger, J Fritz, W M Thaiss, H Ditt, K Weisel, M Haap, Christopher Kloth
PURPOSE: To compare qualitative and quantitative computed tomography (CT) and magnetic resonance imaging (MRI) parameters for longitudinal disease monitoring of multiple myeloma (MM) of the axial skeleton. MATERIALS AND METHODS: We included 31 consecutive patients (17 m; mean age 59.20 ± 8.08 years) with MM, who underwent all baseline (n = 31) and at least one or more (n = 47) follow-up examinations consisting of multi-parametric non-enhanced whole-body MRI (WBMRI) and non-enhanced whole-body reduced-dose thin-section MDCT (NEWBMDCT) between 06/2013 and 09/2016...
December 8, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/29218610/feasibility-of-whole-body-diffusion-weighted-mri-for-detection-of-primary-tumour-nodal-and-distant-metastases-in-women-with-cancer-during-pregnancy-a-pilot-study
#3
Sileny N Han, Frédéric Amant, Katrijn Michielsen, Frederik De Keyzer, Steffen Fieuws, Kristel Van Calsteren, Raphaëla C Dresen, Mina Mhallem Gziri, Vincent Vandecaveye
OBJECTIVES: To evaluate the feasibility of whole-body diffusion-weighted MRI (WB-DWI/MRI) for detecting primary tumour, nodal and distant metastases in pregnant women with cancer. METHODS: Twenty pregnant patients underwent WB-DWI/MRI in additional to conventional imaging. Reproducibility of WB-DWI/MRI between two readers was evaluated using Cohen's κ statistics and accuracy was compared to conventional imaging for assessing primary tumour site, nodal and visceral metastases...
December 7, 2017: European Radiology
https://www.readbyqxmd.com/read/29217779/prognostic-significance-of-tumor-burden-assessed-by-whole-body-magnetic-resonance-imaging-in-multiple-myeloma-patients-treated-with-allogeneic-stem-cell-transplantation
#4
Jennifer Mosebach, Sofia Shah, Stefan Delorme, Thomas Hielscher, Hartmut Goldschmidt, Heinz-Peter Schlemmer, Stefan O Schönland, Ute Hegenbart, Jens Hillengass
Allogeneic stem cell transplantation is a disputed but increasing therapeutic option in patients suffering from multiple myeloma in Europe. To study possible predictors of survival, 79 patients were investigated using whole-body magnetic resonance imaging to assess the visible tumor burden before and after allogeneic stem cell transplantation. Statistical analysis of clinical and imaging parameters included Cox regression models and distribution of survival time estimates (Kaplan-Meier method). Log rank test was used to determine the prognostic impact of the presence of focal lesions on survival...
December 7, 2017: Haematologica
https://www.readbyqxmd.com/read/29217493/effects-of-proximity-and-noise-level-of-phased-array-coil-elements-on-overall-signal-to-noise-in-parallel-mr-spectroscopy
#5
Candace C Fleischer, Xiaodong Zhong, Hui Mao
Parallel imaging using phased array coils facilitates accelerated magnetic resonance imaging (MRI) and spectroscopy (MRS). Parallel data reconstruction requires the combination of data from individual coil elements, but limited combination algorithms currently exist for higher-order phased arrays and MRS data. Here, we present a systematic framework for identifying coil proximity-related signal inhomogeneities and noise levels in phased array coils that may affect sensitivity of parallel MRS. Single-voxel MRS was acquired in nine voxel positions in a brain spectroscopy phantom on a 3T whole-body MR scanner using commercially available 64-, 32-, and 20-channel phased array coils...
December 4, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/29212868/painful-testicular-metastasis-from-prostate-adenocarcinoma
#6
Karla A Lee, Erik Mayer, Vincent Khoo
A 60-year-old man presented with unilateral testicular pain and urinary frequency. His presenting prostate-specific antigen (PSA) was 100 ng/mL, and a biopsy revealed Gleason 4+4 prostate adenocarcinoma. The significance of his initial PSA was somewhat complicated by possible prostatitis and early initiation of bicalutamide. PSA rose on two occasions prior to radiotherapy but coincided with a flare of testicular pain on one of these. Whole-body staging diffusion-weighted MRI scan was negative. He was treated with 3 years of androgen deprivation therapy (ADT) and radical radiotherapy...
December 5, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29206339/reversibility-of-myocardial-metabolism-and-remodeling-in-morbidly-obese-patients-six-months-after-bariatric-surgery
#7
Jarna C Hannukainen, Riikka Lautamäki, Jussi Pärkkä, Marjatta Strandberg, Virva Saunavaara, Saija Hurme, Minna Soinio, Prince Dadson, Kirsi A Virtanen, Tove Grönroos, Sarita Forsback, Paulina Salminen, Patricia Iozzo, Pirjo Nuutila
AIMS/HYPOTHESIS: To study myocardial substrate uptake, structure and function before and after bariatric surgery to clarify the interaction between myocardial metabolism and cardiac remodeling in morbid obesity. METHODS: We studied 46 subjects (age 44±10 yrs, BMI 42±4 kg/m2), including 18 with type 2 diabetes before and six months after bariatric surgery and 25 healthy age-matched controls. Myocardial fasting free fatty acid uptake (MFAU) and insulin-stimulated glucose uptake (MGU) were measured using PET...
December 5, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/29204962/adult-leukoencephalopathies-with-prominent-infratentorial-involvement-can-be-caused-by-erdheim-chester-disease
#8
Luisa Chiapparini, Giulio Cavalli, Tiziana Langella, Anna Venerando, Giacomo De Luca, Sergio Raspante, Giorgio Marotta, Bianca Pollo, Giuseppe Lauria, Maria Giulia Cangi, Simonetta Gerevini, Andrea Botturi, Davide Pareyson, Lorenzo Dagna, Ettore Salsano
BACKGROUND: Leukoencephalopathies with prominent involvement of cerebellum and brainstem, henceforward called prominent infratentorial leukoencephalopathies (PILs), encompass a variety of inherited and acquired white matter diseases. Erdheim-Chester disease (ECD) is a rare non-Langerhans cell histiocytosis likely under-diagnosed as cause of adult PIL. METHODS: We reviewed the clinical and laboratory information of ten consecutive sporadic adult patients with PIL of unknown origin, who were investigated for ECD...
December 4, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/29199057/epidemiology-of-hepatic-steatosis-at-a-tertiary-care-center-an-mri-based-analysis
#9
Tyler J Fraum, Daniel R Ludwig, Scott Kilian, William A Curtis, Thomas K Pilgram, Claude B Sirlin, Kathryn J Fowler
RATIONALE AND OBJECTIVES: Little is known about the frequency and risk factors of hepatic steatosis in the tertiary care setting. Such knowledge is essential to clinicians making decisions about testing for this condition. Thus, our aim was to describe the epidemiology of hepatic steatosis, as captured by magnetic resonance imaging (MRI), at a tertiary care center. MATERIALS AND METHODS: A near-consecutive cohort of 1006 adult patients underwent standard-of-care liver MRIs...
December 1, 2017: Academic Radiology
https://www.readbyqxmd.com/read/29199055/bone-marrow-involvement-in-malignant-lymphoma-evaluation-of-quantitative-pet-and-mri-biomarkers
#10
Ulrika Asenbaum, Richard Nolz, Georgios Karanikas, Julia Furtner, Ramona Woitek, Ingrid Simonitsch-Klupp, Markus Raderer, Marius E Mayerhoefer
RATIONALE AND OBJECTIVES: This study aimed to determine the diagnostic utility of standardized uptake values (SUV) and apparent diffusion coefficients (ADC) for assessment of focal and diffuse bone marrow involvement in patients with malignant lymphoma. MATERIALS AND METHODS: Sixty treatment-naive patients (28 males; mean age 51.2 ± 16.7 years) with histologically proven lymphoma, who underwent fludeoxyglucose (18F) positron emission tomography-computed tomography ([F18]-FDG-PET/CT) and whole-body diffusion-weighted imaging (WB-DWI) within 7 days, and also routine bone marrow biopsy, were included in this institutional review board-approved, retrospective study...
November 30, 2017: Academic Radiology
https://www.readbyqxmd.com/read/29193340/template-based-field-map-prediction-for-rapid-whole-brain-b0-shimming
#11
Yuhang Shi, S Johanna Vannesjo, Karla L Miller, Stuart Clare
PURPOSE: In typical MRI protocols, time is spent acquiring a field map to calculate the shim settings for best image quality. We propose a fast template-based field map prediction method that yields near-optimal shims without measuring the field. METHODS: The template-based prediction method uses prior knowledge of the B0 distribution in the human brain, based on a large database of field maps acquired from different subjects, together with subject-specific structural information from a quick localizer scan...
November 28, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29192363/quantitative-and-visual-assessments-toward-potential-sub-msv-or-ultrafast-fdg-pet-using-high-sensitivity-tof-pet-in-pet-mri
#12
Spencer C Behr, Emma Bahroos, Randall A Hawkins, Lorenzo Nardo, Vahid Ravanfar, Emily V Capbarat, Youngho Seo
PURPOSE: Newer high-performance time-of-flight (TOF) positron emission tomography (PET) systems have the capability to preserve diagnostic image quality with low count density, while maintaining a high raw photon detection sensitivity that would allow for a reduction in injected dose or rapid data acquisition. To assess this, we performed quantitative and visual assessments of the PET images acquired using a highly sensitive (23.3 cps/kBq) large field of view (25-cm axial) silicon photomultiplier (SiPM)-based TOF PET (400-ps timing resolution) integrated with 3 T-MRI in comparison to PET images acquired on non-TOF PET/x-ray computed tomography (CT) systems...
November 30, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/29191855/comparison-of-68ga-ops202-68ga-nodaga-jr11-and-68ga-dotatoc-68ga-edotreotide-pet-ct-in-patients-with-gastroenteropancreatic-neuroendocrine-tumors-evaluation-of-sensitivity-in-a-prospective-phase-ii-imaging-study
#13
Guillaume P Nicolas, Nils Schreiter, Felix Kaul, John Uiters, Hakim Bouterfa, Jens Kaufmann, Tobias E Erlanger, Richard Cathomas, Emanuel Christ, Melpomeni Fani, Damian Wild
Radiolabeled somatostatin receptor (sst) agonists are integral to the diagnosis of gastroenteropancreatic neuroendocrine tumors (GEP-NETs), but detection rates, especially of liver metastases, remain disappointing even with PET/CT. 68Ga-OPS202 (68Ga-NODAGA-JR11), a novel radiolabeled sst antagonist with a high affinity for sst2, has the potential to perform better than sst agonists. Here we present the results of the Phase II component of a Phase I/II study, which evaluated the sensitivity of 68Ga-OPS202 PET/CT compared with the reference compound, 68Ga-DOTATOC (sst agonist)...
November 30, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29187689/-a-case-of-leptomeningeal-melanomatosis-with-acute-paraplegia-and-multiple-cranial-nerve-palsies
#14
Kasumi Hattori, Nozomu Matsuda, Takenobu Murakami, Eiichi Ito, Yoshikazu Ugawa
A 62-year-old man with acute paraplegia was transferred to our hospital. He had flaccid paraplegia and multiple cranial nerve palsies, such as mydriasis of the left pupil, abduction palsy of the left eye, hoarseness and dysphagia, but no meningeal irritation signs. MRI of the spinal canal showed swellings of the conus medullaris and the cauda equine, and also contrast enhancement of the spinal meninges. The cerebrospinal fluid (CSF) showed pleocytosis and protein increment. The lymph node was swollen in his right axilla...
November 28, 2017: Rinshō Shinkeigaku, Clinical Neurology
https://www.readbyqxmd.com/read/29182385/magnetic-resonance-imaging-measurements-of-organs-within-the-coelomic-cavity-of-red-eared-sliders-trachemys-scripta-elegans-yellow-bellied-sliders-trachemys-scripta-scripta-coastal-plain-cooters-pseudemys-concinna-floridana-and-hieroglyphic-river-cooters-pseudemys
#15
Karina A Mathes, Marcus Schnack, Karl Rohn, Michael Fehr
OBJECTIVE To determine anatomic reference points for 4 turtle species and to evaluate data on relative anatomic dimensions, signal intensities (SIs), and position of selected organs within the coelomic cavity by use of MRI. ANIMALS 3 turtle cadavers (1 red-eared slider [Trachemys scripta elegans], 1 yellow-bellied slider [Trachemys scripta scripta], and 1 Coastal plain cooter [Pseudemys concinna floridana]) and 63 live adult turtles (30 red-eared sliders, 20 yellow-bellied sliders, 5 Coastal plain cooters, and 8 hieroglyphic river cooters [Pseudemys concinna hieroglyphica])...
December 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/29168981/high-resolution-rapid-neonatal-whole-body-composition-using-3-0-tesla-chemical-shift-magnetic-resonance-imaging
#16
Jonathan P Dyke, Amanda C Garfinkel, Alan M Groves, Arzu Kovanlikaya
BACKGROUND: To evaluate a whole body rapid imaging technique to calculate neonatal lean body mass and percentage adiposity using 3.0 Tesla chemical shift Magnetic Resonance Imaging (MRI). METHODS: A 2-Point Dixon MRI technique was used to calculate whole body fat and water images in term (n=10) and preterm (n=15) infants. RESULTS: Chemical shift images were obtained in 42 s. MRI calculated whole body mass correlated closely with measured body weight (R(2)=0...
November 23, 2017: Pediatric Research
https://www.readbyqxmd.com/read/29164364/highlights-on-mri-of-the-fetal-body
#17
REVIEW
Lucia Manganaro, Amanda Antonelli, Silvia Bernardo, Federica Capozza, Roberta Petrillo, Serena Satta, Valeria Vinci, Matteo Saldari, Francesca Maccioni, Laura Ballesio, Carlo Catalano
Fetal MRI is a level III diagnostic tool performed subsequently a level II prenatal ultrasound (US), in cases of inconclusive ultrasonographic diagnosis or when a further investigation is required to confirm or improve the diagnosis, to plan an appropriate pregnancy management. Fetal MRI plays an increasingly important role in the prenatal diagnosis of fetal neck, chest and abdominal malformations, even if its role has been amply demonstrated, especially, in the field of fetal CNS anomalies. Due to its multiparametricity and multiplanarity, MRI provides a detailed evaluation of the whole fetal respiratory, gastrointestinal and genitourinary systems, especially on T2-weighted (W) images, with a good tissue contrast resolution...
November 21, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/29164299/comparison-of-18-f-fdg-pet-mri-and-mri-alone-for-whole-body-staging-and-potential-impact-on-therapeutic-management-of-women-with-suspected-recurrent-pelvic-cancer-a-follow-up-study
#18
Lino M Sawicki, Julian Kirchner, Johannes Grueneisen, Verena Ruhlmann, Bahriye Aktas, Benedikt M Schaarschmidt, Michael Forsting, Ken Herrmann, Gerald Antoch, Lale Umutlu
PURPOSE: To evaluate the diagnostic performance of (18)F-FDG PET/MRI for whole-body staging and potential changes in therapeutic management of women with suspected recurrent pelvic cancer in comparison with MRI alone. METHODS: Seventy-one consecutive women (54 ± 13 years, range: 25-80 years) with suspected recurrence of cervical (32), ovarian (26), endometrial (7), vulvar (4), and vaginal (2) cancer underwent PET/MRI including a diagnostic contrast-enhanced MRI protocol...
November 21, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29159779/simultaneous-whole-body-and-breast-18f-fdg-pet-mri-examinations-in-patients-with-breast-cancer-a-comparison-of-apparent-diffusion-coefficients-and-maximum-standardized-uptake-values
#19
Michiro Sasaki, Mitsuhiro Tozaki, Kazunori Kubota, Wakana Murakami, Daisuke Yotsumoto, Yasuaki Sagara, Yasuyo Ohi, Shunichi Oosako, Yoshiaki Sagara
PURPOSE: To compare standardized uptake value (SUV) and apparent diffusion coefficient (ADC) values acquired using a PET/MRI scanner in breast cancer patients. MATERIALS AND METHODS: Whole-body PET/MRI and breast PET/MRI were performed in 108 consecutive patients. Ninety-four patients who had a total of 100 breast cancers were analyzed. SUVmax and ADCmean acquired using breast PET/MRI were compared with pathologic prognostic factors. RESULTS: All the lesions were visually detectable using PET and diffusion-weighted imaging (DWI) on breast PET/MRI; however, lesions were visually undetectable on whole-body DWI in 13 patients (13%) or on whole-body PET in 7 patients (7%)...
November 20, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/29151119/whole-body-magnetic-resonance-imaging-for-detection-of-skeletal-metastases-in-children-and-young-people-with-primary-solid-tumors-systematic-review
#20
A M Smets, E E Deurloo, T J E Slager, J Stoker, S Bipat
BACKGROUND: Many solid neoplasms have a propensity for osteomedullary metastases of which detection is important for staging and subsequent treatment. Whole-body magnetic resonance imaging (WB-MRI) has been shown to accurately detect osteomedullary metastases in adults, but these findings cannot be unconditionally extrapolated to staging of children with malignant solid tumors. OBJECTIVE: To conduct a literature review on the sensitivity of WB-MRI for detecting skeletal metastases in children with solid tumors...
November 18, 2017: Pediatric Radiology
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