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https://www.readbyqxmd.com/read/29667881/the-ability-of-adc-measurements-in-the-assessment-of-patients-with-stage-i-endometrial-carcinoma-based-on-three-risk-categories
#1
Shijia Wang, Jia Liu, Feng Yuan, Xiaojun Chen, Fenghua Ma, Guofu Zhang, Xiaomei Tian
Background Better selection of patients with intermediate and high-risk stage I endometrial carcinoma (EC) for lymphadenectomy has an important effect on the prognosis. Purpose To investigate the role of apparent diffusion coefficient (ADC) measurements in the assessment of stage I EC patients based on three risk categories. Material and Methods We retrospectively studied 80 patients with EC and 28 cervical cancer patients with normal endometrium. 1.5-T conventional magnetic resonance imaging (MRI) and diffusion-weighted imaging (DWI) (b = 0, 1000 s/mm2 ) were performed, and ADC values were calculated...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29666994/whole-body-mri-in-spondyloarthritis-spa-preliminary-results-suggest-that-dwi-outperforms-stir-for-lesion-detection
#2
Frederic E Lecouvet, Nicolas Vander Maren, Laurence Collette, Nicolas Michoux, Perrine Triqueneaux, Maria Stoenoiu, Frederic Houssiau, Jacques Malghem, Marie-Laurence Denis, Ahmed Larbi, Adrien Nzeusseu Toukap
PURPOSE: To compare the diagnostic accuracy of DWI and STIR sequences in Whole body (WB) MRI of SpA patients. MATERIALS AND METHODS: Twenty consecutive patients with confirmed active SpA and 20 controls were investigated with identical WB MRI protocols, including DWI and STIR images. Two observers recorded 'lesions' (high signal intensity foci on STIR and high b-value DWI) in 17 anatomical areas, making a 17-point 'area score' and a 40-point 'lesion score'. ROC performance, inter-observer agreement, correlation with clinical parameters and spine and sacro-iliac joints (SIJ) MRI scores were assessed...
April 17, 2018: European Radiology
https://www.readbyqxmd.com/read/29666952/utility-of-diffusion-weighted-mr-imaging-in-the-diagnosis-of-placenta-accreta-spectrum-abnormality
#3
Bhagya Sannananja, Anna Ellermeier, Daniel S Hippe, Thomas C Winter, Stella K Kang, Susanna I Lee, Mark R Kilgore, Manjiri K Dighe
PURPOSE: The aim of this study was to evaluate the utility of added DWI sequences as an adjunct to traditional MR imaging in the evaluation of abnormal placentation in patients with suspicion for placenta accreta spectrum abnormality or morbidly adherent placenta (MAP). MATERIALS AND METHODS: The study was approved by local ethics committee. The subjects included pregnant women with prenatal MRI performed between July 2013 to July 2015. All imaging was performed on a Philips 1...
April 17, 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29666887/reversible-lesions-of-the-corpus-callosum-with-initially-restricted-diffusion-in-a-series-of-caucasian-children
#4
Anthony Le Bras, Maia Proisy, Mathieu Kuchenbuch, Constantin Gomes, Catherine Tréguier, Sylvia Napuri, Emmanuel Quehen, Bertrand Bruneau
BACKGROUND: Reversible lesions of the corpus callosum with initial restricted diffusion on diffusion-weighted imaging (DWI) are rare and mainly described in the south Asiatic population. OBJECTIVE: The purpose of this study was to describe the clinical presentation, imaging findings, prognosis and etiology of transient restricted diffusion lesions of the corpus callosum in a series of Caucasian children. MATERIALS AND METHODS: Seven children presenting with a transient restricted DWI lesion of the corpus callosum were included...
April 17, 2018: Pediatric Radiology
https://www.readbyqxmd.com/read/29656584/improving-lymph-node-characterization-in-staging-malignant-lymphoma-using-first-order-adc-texture-analysis-from-whole-body-diffusion-weighted-mri
#5
Katja N De Paepe, Frederik De Keyzer, Pascal Wolter, Oliver Bechter, Daan Dierickx, Ann Janssens, Gregor Verhoef, Raymond Oyen, Vincent Vandecaveye
BACKGROUND: Correct staging and treatment initiation in malignant lymphoma depends on accurate lymph node characterization. However, nodal assessment based on conventional and diffusion-weighted (DWI) MRI remains challenging, particularly in smaller nodes. PURPOSE: To evaluate first-order apparent diffusion coefficient (ADC) texture parameters compared to mean ADC for lymph node characterization in non-Hodgkin lymphoma (NHL) using whole-body DWI (WB-DWI). STUDY TYPE: Retrospective...
April 14, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29642773/dce-mri-derived-volume-transfer-constant-k-trans-and-dwi-apparent-diffusion-coefficient-as-predictive-markers-of-short-and-long-term-efficacy-of-chemoradiotherapy-in-patients-with-esophageal-cancer
#6
Zhi-Min Ye, Shu-Jun Dai, Feng-Qin Yan, Lei Wang, Jun Fang, Zhen-Fu Fu, Yue-Zhen Wang
This study aimed to evaluate both the short- and long-term efficacies of chemoradiotherapy in relation to the treatment of esophageal cancer . This was achieved through the use of dynamic contrast-enhanced magnetic resonance imaging-derived volume transfer constant and diffusion weighted imaging-derived apparent diffusion coefficient . Patients with esophageal cancer were assigned into the sensitive and resistant groups based on respective efficacies in chemoradiotherapy. Dynamic contrast-enhanced magnetic resonance imaging and diffusion weighted imaging were used to measure volume transfer constant and apparent diffusion coefficient, while computed tomography was used to calculate tumor size reduction rate...
January 1, 2018: Technology in Cancer Research & Treatment
https://www.readbyqxmd.com/read/29629794/does-the-addition-of-dwi-to-fluid-sensitive-conventional-mri-of-the-sacroiliac-joints-improve-the-diagnosis-of-sacroiliitis
#7
Luis S Beltran, Mohammad Samim, Soterios Gyftopoulos, Mary T Bruno, Catherine N Petchprapa
OBJECTIVE: The purpose of this study was to determine whether adding DWI to conventional MRI of the sacroiliac joints improves the diagnostic performance of MRI readers in the detection of sacroiliitis. MATERIALS AND METHODS: MR images of the sacroiliac joints of 63 patients with lower back pain obtained between January 2016 and December 2016 were analyzed retrospectively. Three readers reviewed the MRI studies for bone marrow edema lesions around the sacroiliac joints as a marker of active sacroiliitis and gave a diagnostic confidence score of 0-4 using MRI without DWI and MRI with DWI in separate sessions...
April 9, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29627288/multiparametric-whole-body-mri-with-diffusion-weighted-imaging-and-adc-mapping-for-the-identification-of-visceral-and-osseous-metastases-from-solid-tumors
#8
Michael A Jacobs, Katarzyna J Macura, Atif Zaheer, Emmanuel S Antonarakis, Vered Stearns, Antonio C Wolff, Thorsten Feiweier, Ihab R Kamel, Richard L Wahl, Li Pan
RATIONALE AND OBJECTIVES: The purpose of this study was to investigate the use of multiparametric, whole-body, diffusion-weighted imaging (WB-DWI) and apparent diffusion coefficient (ADC) maps with T2 -weighted magnetic resonance imaging (MRI) at 3T for the detection and monitoring of metastatic disease in patients. MATERIALS AND METHODS: Fifty-four participants (32 healthy subjects and 22 patients) were scanned with WB-DWI methods using a 3T MRI scanner. Axial, sagittal, or coronal fat-suppressed T2 -weighted (T2 WI), T1 -weighted (T1 WI), and DWI images were acquired...
April 4, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29626518/effect-of-cardiac-related-translational-motion-in-diffusion-mri-of-the-spinal-cord
#9
Darya Morozov, Nibardo Lopez Rios, Tanguy Duval, Alexandru Foias, Julien Cohen-Adad
Cardiac-related spinal cord motion affects diffusion-weighted (DWI) signal. The goal of this study was to further quantify the specific detrimental effect of cord translational motion on the DWI signal in order to make better informed decisions about the cost-benefit of cardiac gating. We designed an MRI-compatible phantom mimicking the spinal cord translational motion. Cardiac-gated DWI data were acquired by varying the trigger delay and the b-values. Evaluation of the effect of motion on the DWI signal was done by computing the apparent diffusion coefficient (ADC) along (z-direction) and orthogonal (y- and x-directions) to the phantom...
April 4, 2018: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/29626258/mr-elastography-in-primary-sclerosing-cholangitis-correlating-liver-stiffness-with-bile-duct-strictures-and-parenchymal-changes
#10
Candice A Bookwalter, Sudhakar K Venkatesh, John E Eaton, Thomas D Smyrk, Richard L Ehman
AIM: To determine correlation of liver stiffness measured by MR Elastography (MRE) with biliary abnormalities on MR Cholangiopancreatography (MRCP) and MRI parenchymal features in patients with primary sclerosing cholangitis (PSC). METHODS: Fifty-five patients with PSC who underwent MRI of the liver with MRCP and MRE were retrospectively evaluated. Two board-certified abdominal radiologists in agreement reviewed the MRI, MRCP, and MRE images. The biliary tree was evaluated for stricture, dilatation, wall enhancement, and thickening at segmental duct, right main duct, left main duct, and common bile duct levels...
April 7, 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29620604/diffusion-weighted-imaging-with-apparent-diffusion-coefficient-mapping-for-breast-cancer-detection-as-a-stand-alone-parameter-comparison-with-dynamic-contrast-enhanced-and-multiparametric-magnetic-resonance-imaging
#11
Katja Pinker, Linda Moy, Elizabeth J Sutton, Ritse M Mann, Michael Weber, Sunitha B Thakur, Maxine S Jochelson, Zsuzsanna Bago-Horvath, Elizabeth A Morris, Pascal At Baltzer, Thomas H Helbich
PURPOSE: The aims of this study were to compare dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI) with diffusion-weighted imaging (DWI) with apparent diffusion coefficient mapping as a stand-alone parameter without any other supportive sequence for breast cancer detection and to assess its combination as multiparametric MRI (mpMRI) of the breast. MATERIALS AND METHODS: In this institutional review board-approved single-center study, prospectively acquired data of 106 patients who underwent breast MRI from 12/2010 to 09/2014 for an imaging abnormality (Breast Imaging Reporting and Data System 0, 4/5) were retrospectively analyzed...
April 3, 2018: Investigative Radiology
https://www.readbyqxmd.com/read/29617449/assessment-of-veins-in-t2-weighted-mr-angiography-predicts-infarct-growth-in-hyperacute-ischemic-stroke
#12
Susumu Yamaguchi, Nobutaka Horie, Minoru Morikawa, Yohei Tateishi, Takeshi Hiu, Yoichi Morofuji, Tsuyoshi Izumo, Kentaro Hayashi, Takayuki Matsuo
BACKGROUND AND PURPOSE: T2*-weighted magnetic resonance angiography (SWAN) detects hemodynamic insufficiency as hypointense areas in medullary or cortical veins. We therefore investigated whether SWAN can help predict ischemic penumbra-like lesions in patients with acute ischemic stroke (AIS). MATERIALS AND METHODS: Magnetic resonance imaging (MRI) records-including SWAN, diffusion-weighted imaging (DWI), and magnetic resonance angiography (MRA)-of consecutive patients with major vessel occlusion within 6 h from AIS onset were analyzed...
2018: PloS One
https://www.readbyqxmd.com/read/29617445/comparison-of-six-fit-algorithms-for-the-intra-voxel-incoherent-motion-model-of-diffusion-weighted-magnetic-resonance-imaging-data-of-pancreatic-cancer-patients
#13
Oliver J Gurney-Champion, Remy Klaassen, Martijn Froeling, Sebastiano Barbieri, Jaap Stoker, Marc R W Engelbrecht, Johanna W Wilmink, Marc G Besselink, Arjan Bel, Hanneke W M van Laarhoven, Aart J Nederveen
The intravoxel incoherent motion (IVIM) model for diffusion-weighted imaging (DWI) MRI data bears much promise as a tool for visualizing tumours and monitoring treatment response. To improve the currently poor precision of IVIM, several fit algorithms have been suggested. In this work, we compared the performance of two Bayesian IVIM fit algorithms and four other IVIM fit algorithms for pancreatic cancer imaging. DWI data were acquired in 14 pancreatic cancer patients during two MRI examinations. Three different measures of performance of the fitting algorithms were assessed: (i) uniqueness of fit parameters (Spearman's rho); (ii) precision (within-subject coefficient of variation, wCV); and (iii) contrast between tumour and normal-appearing pancreatic tissue...
2018: PloS One
https://www.readbyqxmd.com/read/29611841/significance-of-diffusion-weighted-imaging-dwi-as-an-improving-factor-in-contrast-enhanced-magnetic-resonance-imaging-mri-enterography-in-evaluation-of-patients-with-crohn-s-disease
#14
Bilal Imširović, Enver Zerem, Alma Efendić, Alma Mekić Abazović, Omar Zerem, Muhamed Djedović
Aim To determine capabilities and potential of contrast enhanced magnetic resonance imaging (MRI) enterography in order to establish the diagnosis and to evaluate severity and activity of intestinal inflammation. Methods Fifty-five patients with suspicion for presence of Crohn's disease were evaluated. All patients underwent contrast enhanced MRI enterography and diffusion weighted imaging (DWI), and subsequently endoscopic examination or surgical treatment. Four parameters were analysed: thickening of the bowel wall, and presence of abscess, fistula and lymphadenopathy...
August 1, 2018: Medicinski Glasnik
https://www.readbyqxmd.com/read/29606926/prediction-of-microvascular-invasion-in-hepatocellular-carcinoma-preoperative-gd-eob-dtpa-dynamic-enhanced-mri-and-histopathological-correlation
#15
Mengqi Huang, Bing Liao, Ping Xu, Huasong Cai, Kun Huang, Zhi Dong, Ling Xu, Zhenpeng Peng, Yanji Luo, Keguo Zheng, Baogang Peng, Zi-Ping Li, Shi-Ting Feng
Objective: To investigate the imaging features observed in preoperative Gd-EOB-DTPA-dynamic enhanced MRI and correlated with the presence of microvascular invasion (MVI) in hepatocellular carcinoma (HCC) patients. Methods: 66 HCCs in 60 patients with preoperative Gd-EOB-DTPA-dynamic enhanced MRI were retrospectively analyzed. Features including tumor size, signal homogeneity, tumor capsule, tumor margin, peritumor enhancement during mid-arterial phase, peritumor hypointensity during hepatobiliary phase, signal intensity ratio on DWI and apparent diffusion coefficients (ADC), T1 relaxation times, and the reduction rate between pre- and postcontrast enhancement images were assessed...
2018: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/29603833/prospective-comparison-of-pi-rads-version-2-and-qualitative-in-house-categorization-system-in-detection-of-prostate-cancer
#16
Sonia Gaur, Stephanie Harmon, Sherif Mehralivand, Sandra Bednarova, Brian P Calio, Dordaneh Sugano, Abhinav Sidana, Maria J Merino, Peter A Pinto, Bradford J Wood, Joanna H Shih, Peter L Choyke, Baris Turkbey
BACKGROUND: Prostate Imaging-Reporting and Data System v. 2 (PI-RADSv2) provides standardized nomenclature for interpretation of prostate multiparametric MRI (mpMRI). Inclusion of additional features for categorization may provide benefit to stratification of disease. PURPOSE: To prospectively compare PI-RADSv2 to a qualitative in-house system for detecting prostate cancer on mpMRI. STUDY TYPE: Prospective. POPULATION: In all, 338 patients who underwent mpMRI May 2015-May 2016, with subsequent MRI/transrectal ultrasound fusion-guided biopsy...
March 31, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29601139/myocardial-fibrosis-evaluated-by-diffusion-weighted-imaging-and-its-relationship-to-3d-contractile-function-in-patients-with-hypertrophic-cardiomyopathy
#17
Rui Wu, Dong-Aolei An, Ruo-Yang Shi, Bing-Hua Chen, Meng Jiang, Andrew Bacyinski, Tong-Tong Han, Jiani Hu, Jian-Rong Xu, Lian-Ming Wu
BACKGROUND: Previous studies have shown that diffusion-weighted imaging (DWI) is sensitive to myocardial fibrosis in ischemic and nonischemic cardiomyopathy. PURPOSE: To explore the prognostic value of apparent diffusion coefficient (ADC) for detecting myocardial fibrosis and its relationship to the contractile function in hypertrophic cardiomyopathy (HCM). STUDY TYPE: Prospective. POPULATION: A total of 45 HCM patients and 20 controls...
March 30, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29599620/vanishing-parotid-tumors-on-mr-imaging
#18
Eiji Matsusue, Yoshio Fujihara, Eiken Matsuda, Yusuke Tokuyasu, Shu Nakamoto, Kazuhiko Nakamura, Toshihide Ogawa
Background: Of all parotid gland tumors, only oncocytoma has been reported to appear isointense to the parotid gland, namely vanishing, on fat-saturated T2 and T1 postcontrast gadolinium-enhanced magnetic resonance imaging (MRI). The purpose of this study was to evaluate vanishing of parotid tumors on conventional MRI with and/or without postcontrast gadolinium-enhancement and on diffusion weighted imaging (DWI). Methods: In 8 of 51 patients, ten parotid gland tumors had homogeneously enhanced lesions and were retrospectively analysed...
March 2018: Yonago Acta Medica
https://www.readbyqxmd.com/read/29599171/signal-change-of-acute-cortical-and-juxtacortical-microinfarction-on-follow-up-mri
#19
M Miyata, S Kakeda, T Yoneda, S Ide, K Watanabe, J Moriya, Y Korogi
BACKGROUND AND PURPOSE: Although the clinical importance of cortical microinfarcts has become well-recognized recently, the evolution of cortical microinfarcts on MR imaging is not fully understood. The aim of this study was to examine the temporal changes in acute cortical microinfarcts using susceptibility-weighted imaging and conventional MR imaging. MATERIALS AND METHODS: Patients with acute infarcts located in the cortical and/or juxtacortical region measuring ≤10 mm in axial diameter based on diffusion-weighted imaging who had a follow-up 3T MR imaging were retrospectively included in the study...
March 29, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29596475/sensitivity-of-different-mri-sequences-in-the-early-detection-of-melanoma-brain-metastases
#20
Katerina Deike-Hofmann, Daniel Thünemann, Michael O Breckwoldt, Daniel Schwarz, Alexander Radbruch, Alexander Enk, Martin Bendszus, Jessica Hassel, Heinz-Peter Schlemmer, Philipp Bäumer
BACKGROUND: After the emergence of new MRI techniques such as susceptibility- and diffusion-weighted imaging (SWI and DWI) and because of specific imaging characteristics of melanoma brain metastases (MBM), it is unclear which MRI sequences are most beneficial for detection of MBM. This study was performed to investigate the sensitivity of six clinical MRI sequences in the early detection of MBM. METHODS: Medical records of all melanoma patients referred to our center between November 2005 and December 2016 were reviewed for presence of MBM...
2018: PloS One
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