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Thomas Frenzel, Chirag Apte, Gregor Jost, Laura Schöckel, Jessica Lohrke, Hubertus Pietsch
OBJECTIVE: Multiple clinical and preclinical studies have reported a signal intensity increase and the presence of gadolinium (Gd) in the brain after repeated administration of Gd-based contrast agents (GBCAs). This bioanalytical study in rat brain tissue was initiated to investigate whether the residual Gd is present as intact GBCA or in other chemical forms by using tissue fractionation and chromatography. MATERIALS AND METHODS: Rats were divided randomly in 6 groups of 10 animals each...
January 25, 2017: Investigative Radiology
Matthew S Davenport, Dariya I Malyarenko, Yuxi Pang, Hero K Hussain, Thomas L Chenevert
OBJECTIVE: The purpose of this study is to investigate the effect of gadoxetate disodium administration on arterial phase respiratory waveforms. SUBJECTS AND METHODS: From 2013 to 2015, 107 subjects undergoing liver MRI with either gadoxetate disodium (10 mL diluted 1:1 with saline; injection rate, 2 mL/s; n = 40) or gadobenate dimeglumine (0.2 mL/kg; maximum, 20 mL; injection rate, 2 mL/s; n = 67) were enrolled. Respiratory waveforms obtained during unenhanced and dynamic contrast-enhanced phases were filtered by a physicist, who was blinded to contrast agent and imaging phase, to eliminate electronic and cardiac noise using fast Fourier transformation...
February 2017: AJR. American Journal of Roentgenology
Tilman Schubert, Utaroh Motosugi, Sonja Kinner, Timothy J Colgan, Samir D Sharma, Scott Hetzel, Shane Wells, Camilo A Campo, Scott B Reeder
PURPOSE: Ferumoxytol (FE) has gained interest as an alternative to gadolinium-based contrast agents (GBCAs). The purpose of this study was to evaluate and optimize ferumoxytol dose and T1 weighting, in comparison to a conventional GBCA. MATERIALS AND METHODS: Twelve healthy volunteers (six women / six men, mean age 44.3 years) were recruited for this study. Scanning was performed on a clinical 3 Tesla (T) MRI system. Gadobenate dimeglumine (GD)-enhanced MRA was performed followed by FE-enhanced MRA 1 month later...
November 10, 2016: Journal of Magnetic Resonance Imaging: JMRI
Giacomo Davide Edoardo Papini, Giovanni Di Leo, Michele Bandirali, Biagio Cotticelli, Nicola Flor, Pietro Restivo, Giovanni Nano, Francesco Sardanelli
OBJECTIVE: The aim of this study was to correlate carotid plaque contrast enhancement (CPCE) to onset of cerebral/cardiovascular events (CCVE) in patients with atherosclerotic carotid disease. METHODS: The ethics committee approved this prospective study. Patients with carotid artery stenosis underwent magnetic resonance angiography before/after injection of 0.1 mmol/kg of gadobenate dimeglumine. Carotid plaque contrast enhancement was graded as follows: 0, no CPCE; 1, 1 single enhancement focus; 2, 2 or more foci...
March 2017: Journal of Computer Assisted Tomography
Jean-Luc Daire, Benjamin Leporq, Valérie Vilgrain, Bernard E Van Beers, Sabine Schmidt, Catherine M Pastor
BACKGROUND AND OBJECTIVES: Gadobenate dimeglumine (Gd-BOPTA) is a commercialised hepatobiliary contrast agent used during liver magnetic resonance imaging (MRI) to detect liver diseases. It enters into human hepatocytes through organic anion transporting polypeptides (OATP1B1/B3) and crosses the canalicular transporter multiple resistance-associated protein 2 (MRP2) to be excreted into bile canaliculi. Gd-BOPTA can return to sinusoids via the sinusoidal transporters MRP3/MRP4. Hepatocyte concentrations of Gd-BOPTA depend on three clearances: the sinusoidal clearance or volume of sinusoidal blood cleared of drugs per unit of time and two hepatocyte clearances (into bile canaliculi or back to sinusoids) or volume of hepatocytes cleared of drugs per unit of time in the respective liver compartments...
October 24, 2016: European Journal of Drug Metabolism and Pharmacokinetics
Mansi R Shah, Milana Flusberg, Viktoriya Paroder, Alla M Rozenblit, Victoria Chernyak
PURPOSE: The purpose was to compare hepatic arterial phase (HAP) respiratory motion artifact (RMA) between gadoxetate, gadobutrol, gadopentetate, and gadobenate. MATERIALS/METHODS: Two hundred cases of each gadolinium agent were included. RMA was assigned using 5-point Likert scale (1=no motion, 5=extreme motion) on precontrast and HAP. RMA increase (increase ≥1 on HAP from precontrast) was the outcome in logistic regression. RESULTS: Odds of RMA increase for gadoxetate were 5...
January 2017: Clinical Imaging
Linda C Chu, Chiara Pozzessere, Celia Pamela Corona-Villalobos, Sandra Castaños, Neda Rastegar, Vivek Halappa, Susanne Bonekamp, Emi Emurano, Ihab R Kamel
OBJECTIVE: Use of gadobenate dimeglumine-enhanced liver magnetic resonance (MR) for evaluation of hepatocellular carcinoma tumor response after transcatheter arterial chemoembolization (TACE). METHODS: Forty-five patients with hepatocellular carcinoma were imaged with multiphase gadobenate dimeglumine-enhanced MR examination at baseline and 1-month follow-up after TACE. Nodule size, enhancement, and apparent diffusion coefficient were measured for both examinations by 2 reviewers...
November 2016: Journal of Computer Assisted Tomography
Yusuhn Kang, Ja-Young Choi, Hye Jin Yoo, Sung Hwan Hong, Heung Sik Kang
Purpose To compare the delayed gadolinium-enhanced magnetic resonance (MR) imaging of cartilage (dGEMRIC) indexes acquired with different gadolinium-based contrast agents (GBCAs), with emphasis on the difference in electrical charge, and to evaluate the feasibility of the use of GBCAs other than gadopentetate dimeglumine with a double negative charge (Gd-DTPA(2-)) as alternatives at dGEMRIC. Materials and Methods Intact porcine patellae (n = 44) were divided into four groups according to GBCA used: Gd-DTPA(2-), double negative gadobenate dimeglumine (Gd-BOPTA(2-)), single negative gadoterate meglumine (Gd-DOTA(-)), and nonionic gadobutrol (Gd-DT-DO3A)...
March 2017: Radiology
Ayami Ohno Kishimoto, Yo Kishimoto, David L Young, Jinjin Zhang, Ian J Rowland, Nathan V Welham
Subepithelial changes to the vocal fold mucosa, such as fibrosis, are difficult to identify using visual assessment of the tissue surface. Moreover, without suspicion of neoplasm, mucosal biopsy is not a viable clinical option, as it carries its own risk of iatrogenic injury and scar formation. Given these challenges, we assessed the ability of high- (4.7 T) and ultrahigh-field (9.4 T) magnetic resonance imaging to resolve key vocal fold subepithelial tissue structures in the rat, an important and widely used preclinical model in vocal fold biology...
November 1, 2016: Disease Models & Mechanisms
A Furlan, O N Close, A A Borhani, Y H Wu, M T Heller
AIM: To perform an intra-individual comparison of the frequency of respiratory-motion artefacts on magnetic resonance imaging (MRI) in cirrhotic patients following injection of gadoxetate disodium and gadobenate dimeglumine. MATERIALS AND METHODS: Ninety-five cirrhotic patients (61 men and 34 women, mean age 58 years) underwent liver MRI with intravenous administration of gadoxetate disodium and gadobenate dimeglumine at different times (interval between studies, 189±83 days)...
January 2017: Clinical Radiology
Govind B Chavhan, Susan Shelmerdine, Kartik Jhaveri, Paul S Babyn
Magnetic resonance (MR) imaging is increasingly being used for comprehensive evaluation of liver diseases in children because of the lack of radiation and better lesion detection and characterization. Liver examination involves routine sequences such as T2-weighted, balanced steady-state free precession, and in-phase and out-of-phase sequences. Dynamic imaging is an essential component of liver examination to characterize focal lesions and involves capturing snapshots of the passage of contrast material in the arterial, portal venous, equilibrium, and sometimes hepatobiliary phases, generally by using T1-weighted three-dimensional gradient-echo sequences...
September 2016: Radiographics: a Review Publication of the Radiological Society of North America, Inc
Joyce T Johnson, Joshua D Robinson, Jie Deng, Cynthia K Rigsby
BACKGROUND: A comprehensive cardiac magnetic resonance (cardiac MR) study including both late gadolinium enhancement (LGE) and MR angiography may be indicated for patients with a history of acquired or congenital heart disease. OBJECTIVE: To study the novel use of an extracellular agent for assessment of LGE combined with a blood pool contrast agent for detailed MR angiography evaluation to yield a comprehensive cardiac MR study in these patients. MATERIALS AND METHODS: We reviewed clinical cardiac MR studies utilizing extracellular and blood pool contrast agents and noted demographics, clinical data and adverse events...
December 2016: Pediatric Radiology
Mamdoh AlObaidy, Miguel Ramalho, Fernanda Velloni, António P Matos, Kevin Herman, Richard C Semelka
OBJECTIVE: To quantitatively compare the extent of enhancement of abdominal structures on MRI in an intraindividual fashion at 1.5 and 3 T. METHODS: HIPAA-compliant, retrospective, longitudinal, intraindividual, crossover study, with waived informed consent, of consecutive individuals scanned at both 1.5 and 3 T closed-bore magnets using gadobenate dimeglumine during different phases of enhancement at tightly controlled arterial phase timing. Quantitative ROI measurements and qualitative sub-phase arterial phase assignments were independently performed by two radiologists...
July 19, 2016: European Radiology
Girolamo Crisi, Silvano Filice, Gunter Erb, Francesca Bozzetti
PURPOSE: To determine whether half of the approved dose of gadobenate dimeglumine (MultiHance) is as effective as a full dose of gadoterate meglumine (Dotarem) for qualitative and quantitative cerebral blood volume (CBV) perfusion evaluation at 3T in patients with brain gliomas. MATERIALS AND METHODS: We enrolled 65 adult patients in an interindividual comparative study. Patients were randomized to one of two study arms: 33 patients received 0.1 mmol/kg body weight (bw) of gadoterate, 32 patients received 0...
July 4, 2016: Journal of Magnetic Resonance Imaging: JMRI
Seena Dehkharghani, T Richard Williams, Deqiang Qiu, Amit M Saindane
OBJECTIVE: The purpose of this study was to analyze quantitative and qualitative effects of estimated blood volume on venous enhancement in patients undergoing cerebral MR venography (MRV) with standard weight-based dosing of a gadolinium-based contrast agent. MATERIALS AND METHODS: Fifty-two patients with normal 1.5-T cerebral MRV findings and contemporaneous height and weight measurements were included. Estimated blood volume was calculated with the Nadler formula for blood volume...
September 2016: AJR. American Journal of Roentgenology
Joanna K Duncan, Ning Ma, Thomas D Vreugdenburg, Alun L Cameron, Guy Maddern
PURPOSE: To establish the relative diagnostic accuracy of gadoxetic acid-enhanced magnetic resonance imaging (GA-MRI) compared with contrast-enhanced computed tomography (CE-CT), dynamic MRI (D-MRI), gadopentetic acid-enhanced MRI (GP-MRI), or gadobenic acid-enhanced MRI (GB-MRI) in the characterization of hepatocellular carcinoma (HCC). MATERIALS AND METHODS: PubMed, EMBASE, the Cochrane Library, and the University of York CRD databases were searched to February 29 2016 for any studies that compared the diagnostic accuracy of GA-MRI to CE-CT, D-MRI, GP-MRI, or GB-MRI in patients with known or suspected HCC...
January 2017: Journal of Magnetic Resonance Imaging: JMRI
Anil N Shetty, Robia Pautler, Ketan Ghagahda, David Rendon, Haijun Gao, Zbigniew Starosolski, Rohan Bhavane, Chandreshkumar Patel, Ananth Annapragada, Chandrasekhar Yallampalli, Wesley Lee
The trans-placental permeability of liposomal Gadolinium (Gd) nanoparticle contrast agents was evaluated in a pregnant mouse model. Pregnant Balb/c mice at 16.5 (±1) days of gestation were imaged using a 3D Spoiled Gradient Echo method at 9.4 T using two contrast agents: a clinically approved Gd chelate, Multihance(®) (gadobenate dimeglumine), and a novel experimental liposomal Gd agent. A Dynamic Contrast Enhancement (DCE) protocol was used to capture the dynamics of contrast entry and distribution in the placenta, and clearance from circulation...
2016: Scientific Reports
Gregory J Wilson, Charles S Springer, Sarah Bastawrous, Jeffrey H Maki
PURPOSE: To characterize transverse relaxation in oxygenated whole blood with extracellular gadolinium-based contrast reagents by experiment and simulation. METHODS: Experimental measurements of transverse (1) H2 O relaxation from oxygenated whole human blood and plasma were made at 1.5 and 3.0 Tesla. Spin-echo refocused and free-induction decays are reported for blood and plasma samples containing four different contrast reagents (gadobenate, gadoteridol, gadofosveset, and gadobutrol), each present at concentrations ranging from 1 to 18 mM (i...
June 14, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
Jiuping Liang, Hengguo Li, Likun Gao, Liang Yin, Lei Yin, Jiawen Zhang
PURPOSE: To investigate the clinicopathology and magnetic resonance imaging (MRI) features of bladder paraganglioma, an extremely rare clinical entity. MATERIALS AND METHODS: Five patients with bladder paraganglioma (3 males and 2 females, 27-52 years old) were retrospectively reviewed. All cases underwent baseline MRI and contrast-enhanced scans, and three cases underwent diffusion weighted imaging (DWI) and cystoscopy. Cases were immunohistochemically examined with neuroendocrine markers (chromogranin and synaptophysin) and Ki-67, and histology was reviewed by a pathologist...
April 16, 2016: Urology Journal
Marco Dioguardi Burgio, Dario Picone, Giuseppe Cabibbo, Massimo Midiri, Roberto Lagalla, Giuseppe Brancatelli
PURPOSE: The purpose of the study is to compare the MR-imaging features of hepatocellular carcinoma (HCC) capsule appearance on gadoxetic acid and gadobenate dimeglumine-enhanced MR imaging, using imaging-based presumptive diagnosis of HCC as the reference standard. METHODS: Gadoxetic acid and gadobenate dimeglumine-enhanced MR imaging of 51 patients with 71 HCCs were retrospectively reviewed. Three readers graded in consensus, using a five-point scale, the presence (score 4-5) of capsule appearance on images obtained during T1-weighted GRE portal venous phase (PVP), 3-min phase, and hepatobiliary phase (HBP)...
August 2016: Abdominal Radiology
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