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https://www.readbyqxmd.com/read/27909774/evaluation-of-upper-abdominal-organs-with-dwi-in-patients-with-familial-mediterranean-fever
#1
Eda Albayrak, Safak Sahin
PURPOSE: To investigate the diagnostic efficiency of diffusion-weighted magnetic resonance imaging (DWI) for the evaluation of functional changes that can occur in upper abdominal organs in patients with familial Mediterranean fever (FMF). METHODS: The study included 50 controls, 45 patients with FMF, and 14 patients with FMF who had accompanying proteinuria. Measurement of apparent diffusion coefficient (ADC) was performed using DWI sections obtained from liver, spleen, kidney, and pancreas parenchyma with 1...
December 2, 2016: Abdominal Radiology
https://www.readbyqxmd.com/read/27908306/comparing-diffusion-weighted-imaging-with-clinical-and-blood-parameters-and-with-short-tau-inversion-recovery-sequence-in-detecting-spinal-and-sacroiliac-joint-inflammation-in-axial-spondyloarthritis
#2
Ho Yin Chung, Xiaopei Xu, Vince Wing Hang Lau, Grace Ho, Ka Lai Lee, Philip Hei Li, Helen Hoi Lun Tsang, Suet Kei Kwok, Chak Sing Lau, Chun Sing Wong
OBJECTIVES: To investigate the usefulness of diffusion weighted imaging (DWI) by comparing with clinical features, blood parameters and traditional short tau inversion recovery (STIR) sequence in detecting spinal and sacroiliac (SI) joint inflammation in axial spondyloarthritis (axSpA) patients. METHODS: One hundred and ten axSpA patients were recruited. Clinical, radiological and blood parameters were recorded. DWI and STIR MRI were performed simultaneously and results were scored according to the Spondyloarthritis Research Consortium of Canada (SPARCC) for comparison...
November 13, 2016: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/27904923/can-diffusion-weighted-magnetic-resonance-imaging-of-clear-cell-renal-carcinoma-predict-low-from-high-nuclear-grade-tumors
#3
Carolina Parada Villavicencio, Robert J Mc Carthy, Frank H Miller
OBJECTIVE: To assess the diagnostic performance of the apparent diffusion coefficient (ADC) in predicting the Fuhrman nuclear grading of clear cell renal cell carcinomas (ccRCC). MATERIALS AND METHODS: A total of 129 patients who underwent partial and radical nephrectomies with pathology-proven ccRCC were retrospectively evaluated. Histopathological characteristics and nuclear grades were analyzed. In addition, conventional magnetic resonance imaging (MRI) features were assessed in consensus by two radiologists to discriminate nuclear grading...
December 1, 2016: Abdominal Radiology
https://www.readbyqxmd.com/read/27900458/utility-of-whole-lesion-adc-histogram-metrics-for-assessing-the-malignant-potential-of-pancreatic-intraductal-papillary-mucinous-neoplasms-ipmns
#4
David H Hoffman, Justin M Ream, Christina H Hajdu, Andrew B Rosenkrantz
PURPOSE: To evaluate whole-lesion ADC histogram metrics for assessing the malignant potential of pancreatic intraductal papillary mucinous neoplasms (IPMNs), including in comparison with conventional MRI features. METHODS: Eighteen branch-duct IPMNs underwent MRI with DWI prior to resection (n = 16) or FNA (n = 2). A blinded radiologist placed 3D volumes-of-interest on the entire IPMN on the ADC map, from which whole-lesion histogram metrics were generated. The reader also assessed IPMN size, mural nodularity, and adjacent main-duct dilation...
November 30, 2016: Abdominal Radiology
https://www.readbyqxmd.com/read/27898647/diffusion-weighted-mri-and-18f-fdg-pet-ct-imaging-competition-or-synergy-as-diagnostic-methods-to-manage-sarcoma-of-the-uterus-a-systematic-review-of-the-literature
#5
Julien Dubreuil, Jeremie Tordo, Domenico Rubello, Francesco Giammarile, Andrea Skanjeti
AIM: To evaluate the diagnostic performance of fluorine-18-fluorodeoxyglucose PET/computed tomography (F-FDG-PET/CT) and MRI with diffusion-weighted images (DWI) in uterine sarcomas (US). PATIENTS AND METHODS: A systematic review was performed on Medline, ISI web of knowledge, and Scopus databases for studies reporting the diagnostic performance of F-FDG-PET/CT and DWI-MRI in US published up to 15 February 2016. Exclusion criteria were articles with fewer than five cases of US, without DWI-MRI, and previous series of patients from the same researcher team...
January 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/27894208/whole-body-mri-including-diffusion-weighted-mri-compared-with-5-htp-pet-ct-in-the-detection-of-neuroendocrine-tumors
#6
Lina Carlbom, José Caballero-Corbalán, Dan Granberg, Jens Sörensen, Barbro Eriksson, Håkan Ahlström
AIM: We wanted to explore if whole-body magnetic resonance imaging (MRI) including diffusion-weighted (DW) and liver-specific contrast agent-enhanced imaging could be valuable in lesion detection of neuroendocrine tumors (NET). [11C]-5-Hydroxytryptophan positron emission tomography/computed tomography (5-HTP PET/CT) was used for comparison. MATERIALS AND METHODS: Twenty-one patients with NET were investigated with whole-body MRI, including DW imaging (DWI) and contrast-enhanced imaging of the liver, and whole-body 5-HTP PET/CT...
November 29, 2016: Upsala Journal of Medical Sciences
https://www.readbyqxmd.com/read/27893459/extended-t2-ivim-model-for-correction-of-te-dependence-of-pseudo-diffusion-volume-fraction-in-clinical-diffusion-weighted-magnetic-resonance-imaging
#7
N P Jerome, J A d'Arcy, T Feiweier, D-M Koh, M O Leach, D J Collins, M R Orton
The bi-exponential intravoxel-incoherent-motion (IVIM) model for diffusion-weighted MRI (DWI) fails to account for differential T 2 s in the model compartments, resulting in overestimation of pseudodiffusion fraction f. An extended model, T2-IVIM, allows removal of the confounding echo-time (TE) dependence of f, and provides direct compartment T 2 estimates. Two consented healthy volunteer cohorts (n  =  5, 6) underwent DWI comprising multiple TE/b-value combinations (Protocol 1: TE  =  62-102 ms, b  =  0-250 mm(-2)s, 30 combinations...
December 21, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27890445/acute-carbon-monoxide-poisoning-mr-imaging-findings-with-clinical-correlation
#8
D M Kim, I H Lee, J Y Park, S-B Hwang, D S Yoo, C J Song
PURPOSE: To assess the magnetic resonance imaging (MRI) findings, including diffusion-weighted imaging (DWI) in patients with acute carbon monoxide (CO) poisoning and correlate MRI findings with carboxyhemoglobin levels. MATERIALS AND METHODS: The MRI examinations and medical records of seven men with a mean age of 43±16.0years (SD) (range: 25-63 years) with acute CO poisoning were reviewed. MRI examinations were analyzed with respect to lesion location, imaging presentation on T1- and T2-weighted images, and diffusion characteristics on DWI and apparent diffusion coefficient (ADC) maps...
November 24, 2016: Diagnostic and Interventional Imaging
https://www.readbyqxmd.com/read/27881833/apixaban-for-treatment-of-embolic-stroke-of-undetermined-source-atticus-randomized-trial-rationale-and-study-design
#9
Tobias Geisler, Sven Poli, Christoph Meisner, Juergen Schreieck, Christine S Zuern, Thomas Nägele, Johannes Brachmann, Werner Jung, Georg Gahn, Elisabeth Schmid, Hansjörg Bäezner, Timea Keller, Gabor C Petzold, Jan-Wilko Schrickel, Jan Liman, Rolf Wachter, Frauke Schön, Martin Schabet, Alfred Lindner, Albert C Ludolph, Hubert Kimmig, Sebastian Jander, Uwe Schlegel, Meinrad Gawaz, Ulf Ziemann
RATIONALE: Optimal secondary prevention of embolic stroke of undetermined source is not established. The current standard in these patients is acetylsalicylic acid, despite high prevalence of yet undetected paroxysmal atrial fibrillation. AIM: The ATTICUS randomized trial is designed to determine whether the factor Xa inhibitor apixaban administered within 7 days after embolic stroke of undetermined source, is superior to acetylsalicylic acid for prevention of new ischemic lesions documented by brain magnetic resonance imaging within 12 months after index stroke...
November 23, 2016: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/27878926/the-effects-of-dwi-infarct-lesion-volume-on-dwi-flair-mismatch-is-there-a-need-for-size-stratification
#10
Seyedmehdi Payabvash, Shayandokht Taleb, John C Benson, Jeffrey B Rykken, Mark C Oswood, Alexander M McKinney, Benjamin Hoffman
BACKGROUND: The lack of fluid-attenuated inversion-recovery (FLAIR) hyperintensity in areas of diffusion-weighted imaging (DWI) high signal, or DWI-FLAIR mismatch, is a potential imaging biomarker for timing of stroke onset. We aimed to determine the effects of DWI infarct lesion volume on DWI-FLAIR mismatch and its accuracy for identification of strokes within intravenous (IV) the thrombolytic therapy window. METHODS: Acute ischemic stroke patients with magnetic resonance imaging scan within 12 hours of witnessed stroke were included...
November 23, 2016: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/27874943/mr-enterography-with-diffusion-weighted-imaging-adc-values-in-normal-and-pathological-bowel-loops-a-possible-threshold-adc-value-to-differentiate-active-from-inactive-crohn-s-disease
#11
V Ninivaggi, M Missere, G Restaino, E Gangemi, M Di Matteo, A Pierro, G Sallustio, L Bonomo
OBJECTIVE: The aim of our study was to compare the apparent diffusion coefficient (ADC) values of pathological bowel loops wall (pADC) with the ADC values of normal appearing ones (naADC) and to determine a discriminating threshold. PATIENTS AND METHODS: 60 patients were studied at our Institution through a MR-enterography that included free-breathing axial Diffusion Weighted Imaging (DWI) with two b (0 and 800 s/mm2) after histological diagnosis of active Crohn's disease (CD)...
November 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27874161/diffusion-weighted-magnetic-resonance-imaging-in-the-diagnosis-of-parotid-masses-preliminary-results
#12
Zeynel Yologlu, Hasan Aydin, Nalan A Alp, Bilgin K Aribas, Volkan Kizilgoz, Kemal Arda
To demonstrate the diagnostic potentials of MRI, diffusion weighted imaging (DWI), and apparent diffusion coefficient (ADC) mapping in the detection of parotid masses correlated to the histopathological results. Methods: Study design was retrospective. Fifteen patients with parotid gland masses were included as the study group and contralateral normal parotis glands of same patients were taken as the control group. Patients with bilateral parotid gland tumors were excluded, 7 right-sided and 8 left-sided parotid masses were included in the research...
December 2016: Saudi Medical Journal
https://www.readbyqxmd.com/read/27859961/minimum-apparent-diffusion-coefficient-for-predicting-lymphovascular-invasion-in-invasive-cervical-cancer
#13
Wei Yang, Jin Wei Qiang, Hai Ping Tian, Bing Chen, Ai Jun Wang, Jian Guo Zhao
PURPOSE: To investigate the diagnostic performance of minimum apparent diffusion coefficient (mini-ADC) for predicting lymphovascular invasion (LVI) in invasive cervical cancer. MATERIALS AND METHODS: Ninety-six patients with pathologically confirmed invasive cervical cancer (CC) underwent conventional preoperative magnetic resonance imaging (MRI) and diffusion-weighted imaging (DWI) on a 3.0T MRI system. Tumor ADC, mini-ADC and mini-ADC ratio (mini-ADC value / tumor ADC value) were obtained and compared between LVI-positive and LVI-negative invasive CC, and correlation between LVI status and Ki-67, p16, p63, and clinical prognostic factors were analyzed...
November 8, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27859853/monoexponential-biexponential-and-stretched-exponential-diffusion-weighted-imaging-models-quantitative-biomarkers-for-differentiating-renal-clear-cell-carcinoma-and-minimal-fat-angiomyolipoma
#14
Haojie Li, Lili Liang, Anqin Li, Yao Hu, Daoyu Hu, Zhen Li, Ihab R Kamel
PURPOSE: To determine the utility of various diffusion parameters obtained from monoexponential, biexponential, and stretched exponential diffusion-weighted imaging (DWI) models in differentiating between minimal fat angiomyolipoma (MFAML) and clear cell renal cell carcinoma (ccRCC). MATERIALS AND METHODS: One hundred thirty-one patients with pathologically confirmed MFAML (n = 27) or ccRCC (n = 104) underwent multi-b value DWI (0∼1700 s/mm(2) ) imaging at 3...
November 10, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27859835/differentiation-of-focal-indeterminate-marrow-abnormalities-with-multiparametric-mri
#15
Jun Seung Baik, Joon-Yong Jung, Won-Hee Jee, Chang-Woo Chun, Sun Ki Kim, Seung Han Shin, Yang Guk Chung, Chan-Kwon Jung, Stephan Kannengiesser, YoHan Sohn
PURPOSE: To explore magnetic resonance imaging (MRI) parameters from intravoxel incoherent motion diffusion-weighted imaging (IVIM-DWI), multiecho Dixon imaging (ME-Dixon), and dynamic contrast-enhanced imaging (DCE) for differentiating focal indeterminate marrow abnormalities MATERIALS AND METHODS: Forty-two patients with 14 benign and 28 malignant focal marrow abnormalities were included. The following were independently analyzed by two readers: signal intensity (SI), contour, and margin on conventional MR images; SI on b-800 images (SIb-800 ), apparent diffusion coefficient (ADC), IVIM parameters (Dslow, Dfast , and f), fat fraction (Ff), and DCE parameters (time-to-signal intensity curve pattern, iAUC, K(trans) , kep , and ve )...
November 9, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27857749/erythropoietin-reduces-apoptosis-of-brain-tissue-cells-in-rats-after-cerebral-ischemia-reperfusion-injury-a-characteristic-analysis-using-magnetic-resonance-imaging
#16
Chun-Juan Jiang, Zhong-Juan Wang, Yan-Jun Zhao, Zhui-Yang Zhang, Jing-Jing Tao, Jian-Yong Ma
Some in vitro experiments have shown that erythropoietin (EPO) increases resistance to apoptosis and facilitates neuronal survival following cerebral ischemia. However, results from in vivo studies are rarely reported. Perfusion-weighted imaging (PWI) and diffusion-weighted imaging (DWI) have been applied successfully to distinguish acute cerebral ischemic necrosis and penumbra in living animals; therefore, we hypothesized that PWI and DWI could be used to provide imaging evidence in vivo for the conclusion that EPO could reduce apoptosis in brain areas injured by cerebral ischemia/reperfusion...
September 2016: Neural Regeneration Research
https://www.readbyqxmd.com/read/27853915/renal-cell-carcinoma-applicability-of-the-apparent-coefficient-of-the-diffusion-weighted-estimated-by-mri-for-improving-their-differential-diagnosis-histologic-subtyping-and-differentiation-grade
#17
Yulian Mytsyk, Ihor Dutka, Yuriy Borys, Iryna Komnatska, Iryna Shatynska-Mytsyk, Ammad Ahmad Farooqi, Katarina Gazdikova, Martin Caprnda, Luis Rodrigo, Peter Kruzliak
BACKGROUND: Renal cell carcinoma (RCC) represents the most common malignant epithelial neoplasm of the kidney. Accurate assessment of the renal masses, defining the histologic subtype and the grade of differentiation of the tumor, is vital to ensure an adequate case management as well as for staging and prognosis. Recently, diffusion-weighted imaging (DWI) magnetic resonance imaging (MRI) tends to be increasingly appealing for the clinicians as an imaging procedure of choice for the diagnosis and staging of the RCC, which is predetermined by several advantages over CT...
November 16, 2016: International Urology and Nephrology
https://www.readbyqxmd.com/read/27853494/preoperative-grading-of-astrocytic-supratentorial-brain-tumors-with-diffusion-weighted-magnetic-resonance-imaging-and-apparent-diffusion-coefficient
#18
Mahsa Raisi-Nafchi, Fariborz Faeghi, Alireza Zali, Hamidreza Haghighatkhah, Jalal Jalal-Shokouhi
BACKGROUND: Diffusion-weighted imaging (DWI) is a form of magnetic resonance imaging (MRI) based on measuring the random Brownian motion of water molecules within the biological tissues and is particularly useful in tumor characterization. OBJECTIVES: The purpose of this study was to evaluate the diagnostic value of DW MRI and the apparent diffusion coefficient (ADC) for preoperative grading of astrocytic supratentorial brain tumors. PATIENTS AND METHODS: Twenty-three patients (14 females, 9 males, mean age 43 years) with astrocytic supratentorial brain tumors underwent preoperative conventional MR imaging and DW MRI...
July 2016: Iranian Journal of Radiology: a Quarterly Journal Published By the Iranian Radiological Society
https://www.readbyqxmd.com/read/27852643/correlation-between-apparent-diffusion-coefficient-and-histopathology-subtypes-of-osteosarcoma-after-neoadjuvant-chemotherapy
#19
Jifei Wang, Meili Sun, Dawei Liu, Xiaoshu Hu, Margaret H Pui, Quanfei Meng, Zhenhua Gao
BACKGROUND: Neoadjuvant chemotherapy has made limb-salvage surgery possible for the patients with osteosarcoma. Diffusion-weighted magnetic resonance imaging (DWI) has been used to monitor chemotherapy response. PURPOSE: To correlate the apparent diffusion coefficient (ADC) values with histopathology subtypes of osteosarcoma after neoadjuvant chemotherapy. MATERIAL AND METHODS: Twelve patients with osteoblastic (n = 7), chondroblastic (n = 4), and fibroblastic (n = 1) osteosarcomas underwent post-chemotherapy DWI before limb-salvage surgery...
November 16, 2016: Acta Radiologica
https://www.readbyqxmd.com/read/27852412/-feature-of-magnetic-resonance-imaging-in-patients-with-creutzfeldt-jakob-disease
#20
H X Wang, J Liu, Y H Yang, H P Sun, A H Liu, L P Li, J Ye, Y Hou, Y Sun, H Q Dong, Y P Wang
Objective: To assess the imaging features of 43 patients diagnosed as clinically possible or probable Creutzfeldt-Jakob disease (CJD) for providing referential information and experience on applications of MRI in the clinical diagnosis and treatment of CJD. Method: All patients who were diagnosed with "suspected CJD" and hospitalized in Xuanwu Hospital from January 2013 to November 2015 were collected, and their clinical information and MRI imaging features were analyzed retrospectively. Results: Totally 62 patients with "suspected CJD" were rectruited in this study, and 43 of them were diagnosied as probable and possible CJD when they were discharged...
October 25, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
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