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| 1 | Correlation analysis of dual-energy CT iodine maps with quantitative pulmonary perfusion MRI显示文摘AIM:To correlate dual-energy computed tomography(DECT) pulmonary angiography derived iodine maps with parameter maps of quantitative pulmonary perfusion magnetic resonance imaging(MRI).METHODS:Eighteen patients with pulmonary perfusion defects detected on DECT derived iodine maps were included in this prospective study and additionally underwent time-resolved contrast-enhanced pulmonary MRI [dynamic contrast enhanced(DCE)-MRI].DCE-MRI data were quantitatively analyzed using a pixel-by-pixel deconvolution analysis calculating regional pulmonary blood flow(PBF),pulmonary blood volume(PBV) and mean transit time(MTT) in visually normal lung parenchyma and perfusion defects.Perfusion parameterswere correlated to mean attenuation values of normal lung and perfusion defects on DECT iodine maps.Two readers rated the concordance of perfusion defects in a visual analysis using a 5-point Likert-scale(1 = no correlation,5 = excellent correlation).RESULTS:In visually normal pulmonary tissue mean DECT and MRI values were:22.6 ± 8.3 Hounsfield units(HU);PBF:58.8 ± 36.0 mL/100 mL per minute;PBV:16.6 ± 8.5 mL;MTT:17.1 ± 10.3 s.In areas with restricted perfusion mean DECT and MRI values were:4.0 ± 3.9 HU;PBF:10.3 ± 5.5 mL/100 mL per minute,PBV:5 ± 4 mL,MTT:21.6 ± 14.0 s.The differences between visually normal parenchyma and areas of restricted perfusion were statistically significant for PBF,PBV and DECT(P < 0.0001).No linear correlation was found between MRI perfusion parameters and attenuation values of DECT iodine maps(PBF:r = 0.35,P = 0.15;PBV:r = 0.34,P = 0.16;MTT:r = 0.41,P = 0.08).Visual analysis revealed a moderate correlation between perfusion defects on DECT iodine maps and the parameter maps of DCE-MRI(mean score 3.6,k 0.45).CONCLUSION:There is a moderate visual but not statistically significant correlation between DECT iodine maps and perfusion parameter maps of DCE-MRI. | Jan Hansmann Paul Apfaltrer Frank G Zoellner Thomas Henzler Mathias Meyer Gerald Weisser Stefan O Schoenberg Ulrike I Attenberger | 2013 | World Journal of Radiology2013，5，5： | 6 |
| 2 | Accuracy of multidetector-row CT for restaging after neoadjuvant treatment in patients with oesophageal cancer显示文摘 | Agnieszka Konieczny Philipp Meyer Annelies Schnider Paul Komminoth Mathias Schmid Norbert Lombriser Dominik Weishaupt | 2013 | European Radiology2013，，： | 1 |
| 3 | Effect of ash components on devolatilization behavior of coal in comparison with biomass – Product yields, composition, and heating values显示文摘 | Denise Reichel Mathias Klinger Steffen Krzack Bernd Meyer | 2013 | Fuel2013，，： | 1 |
| 4 | Mutations Abrogating the RNase Activity in Glycoprotein E^m8 of the Pestivirus Classical Swine Fever Virus Lead to Virus Attenuation显示文摘 | GREGOR MEYERS ARMIN SAALMU LLER MATHIAS Bu TTNER | 1999 | J Virol1999，73，10： | 1 |
| 5 | Automating data exchange in process choreographies显示文摘 | Andreas Meyer Luise Pufahl Kimon Batoulis Dirk Fahland Mathias Weske | 2015 | Information Systems2015，，： | 1 |
| 6 | Preoperative mapping of cortical anguage areas in adult brain tumour patients using PET and individual non-normalised SPM analyses显示文摘 | Meyer PT Laszlo S Mathias S | 2003 | European J Nuclear Med Molecular Imaging2003，30，7： | 1 |
| 7 | Localisation of motor areas in brain tumour patients: a comparison of preoperative [18F]FDG-PET and intraoperative cortical electrostimulation显示文摘 | Mathias Schreckenberger Uwe Spetzger Osama Sabri Philipp T. Meyer Thomas Zeggel Michael Zimny Joachim Gilsbach Udalrich Buell | 2001 | European Journal of Nuclear Medicine2001，，9： | 1 |
| 8 | 腹的散开加权的磁性的回声成像上的领域力量和 RF 刺激的影响显示文摘 AIM:To retrospectively and prospectively compare diffusion-weighted(DW)images in the abdomen in a1.5T system and 3.0T systems with and without twochannel functionality for B1shimming.METHODS:DW images of the abdomen were obtained on 1.5T and 3.0T(with and without two-channel functionality for B1shimming)scanners on 150 patients(retrospective study population)and 10 volunteers(prospective study population).Eight regions were selected for clinical significance or artifact susceptibility(at higher field strengths).Objective grading quantified signal-to-noise ratio(SNR),and subjective evaluation qualified image quality,ghosting artifacts,anddiagnostic value.Statistical significance was calculated usingχ2tests(categorical variables)and independent two-sided t tests or Mann-Whitney U tests(continuous variables).RESULTS:The 3.0T using dual-source parallel transmit(dpTX 3.0T)provided the significantly highest SNRs in nearly all regions.In regions susceptible to artifacts at higher field strengths(left lobe of liver,head of pancreas),the SNR was better or similar to the 1.5T system.Subjectively,both dpTX 3.0T and 1.5T systems provided higher image quality,diagnostic value,and less ghosting artifact(P<0.01,most values)compared to the 3.0T system without dual-source parallel transmit(non-dpTX 3.0T).CONCLUSION:The dpTX 3.0T scanner provided the highest SNR.Its image quality,lack of ghosting,and diagnostic value were equal to or outperformed most currently used systems. | Philipp Riffel Raghuram K Rao Stefan Haneder Mathias Meyer Stefan O Schoenberg Henrik J Michaely | 2013 | World Journal of Radiology2013，5，9： | 0 |
| 9 | “Bull’s eye”appearance of hepatocellular adenomas in patients with glycogen storage disease type I-atypical magnetic resonance imaging findings:Two case reports显示文摘BACKGROUND Hepatocellular adenomas are rare tumors that can occur in patients with glycogen storage disease type I.CASE SUMMARY We herein report two cases of histologically proven hepatocellular adenomas in patients with glycogen storage disease type I.Magnetic resonance imaging(MRI)was performed after bolus injection of gadoxetate disodium,a liver-specific gadolinium-based MRI contrast agent.In the present cases,some of the hepatocellular adenomas showed unexpectedly a“bull’s eye”appearance on T2-weighted and post-contrast images,which was not previously described as imaging findings of hepatocellular adenomas in glycogen storage disease.A bull’s eye appearance on T2-weighted images can be encountered in both benign(i.e.,abscess)or malignant(i.e.,epithelioid hemangioendothelioma,cholangiocarcinoma,and metastases)hepatic lesions.CONCLUSION We present two cases of hepatocellular adenomas in patients with glycogen storage disease type 1,in which gadoxetate disodium-MRI showed atypical imaging findings for hepatocellular adenomas.At present there is no systematic study evaluating MRI findings of hepatocellular adenomas in patients with glycogen storage disease,further studies are needed to specifically investigate this issue. | Federica Vernuccio Stephanie Austin Mathias Meyer Cynthia D Guy Priya S Kishnani Daniele Marin | 2021 | World Journal of Clinical Cases2021，9，4： | 0 |
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