Traditional Posters: Body Imaging
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| Alexandra Rose Morgan1,2, Geoff J.M. Parker1,2, Marietta L.J. Scott3, Tim F. Cootes1,2, Josephine H. Naish1,2
1Imaging Science and Biomedical Engineering, School of Cancer and Imaging Sciences, The University of Manchester, Manchester, United Kingdom; 2The Biomedical Imaging Institute, The University of Manchester, Manchester, United Kingdom; 3AstraZeneca, Alderley Park, Macclesfield, United Kingdom Current diagnosis methods in chronic obstructive pulmonary disease (COPD) are not capable of examining regional pathological changes in mechanical properties. We have developed a method for investigating relative regional pulmonary compliance using proton magnetic resonance imaging (MRI). A 2D half-Fourier acquired single-shot turbo spin-echo (HASTE) sequence was optimised for lung imaging. A mesh-based group-wise affine image registration was applied to images ordered according to respiratory cycle position. Information from the registration allowed relative regional compliance measures to be extracted and mapped over the lung. Maps show differences between healthy volunteers and COPD patients and can indicate likely regions of disease. 2521. Quantification of Bleomycin Induced Lung Injury by Means of 1H Magnetic Resonance Elastography Kiaran P. McGee1, Richard L. Ehman1, Rolf D. Hubmayr2, David L. Levin1, Mary Breen3, Debora Rasmussen2, Yogesh K. Mariappan1 1Radiology, Mayo Clinic and Foundation, Rochester, MN, United States; 2Pulmonology & Critical Care, Mayo Clinic and Foundation, Rochester, MN, United States; 3College of Arts and Sciences, Boston College, Boston, MA, United States Interstitial lung disease (ILD) induced end stage fibrosis is a multi phase process that includes presence of an exudate followed by either edema clearance or organization of the space filling material and fibrosis. We have applied magnetic resonance elastography (MRE) to determine if this method can differentiate between normal and those processes associated with ILD. MRE estimates of shear modulus increased following lung injury when compared to an air-filled lung suggesting that lung injury-induced restructuring of lung parenchyma results in changes to the intrinsic mechanical properties of the lung and that these changes can be quantitated with MRE. 2522. Free-Breath DCE MRI for Solitary Pulmonary Nodule with Motion Correction Based on Non-Rigid Image Registration Junichi Tokuda1, Hatsuho Mamata1, Ritu R. Gill1, Samuel Patz1, Nobuhiko Hata1, Robert E. Lenkinski2, David J. Sugarbaker3, Hiroto Hatabu1 1Department of Radiology, Brigham and Women's Hospital, Boston, MA, United States; 2Department of Radiology, Beth Israel Deaconess Medical Center, Boston, MA, United States; 3Department of Surgery, Brigham and Women's Hospital, Boston, MA, United States We demonstrate perfusion analysis of solitary pulmonary nodule based on free-breath DCE MRI. In DCE MRI studies, the kinetics of signal variation at lesions following the administration of the contrast agent is analyzed from time-intensity curve. Thus, it is crucial to measure the signal intensity at the corresponding regions in each frame in the time-series of images for accurate signal intensity curve analysis. However, the respiratory motion of the subjects during scans causes misalignment of anatomical regions among the frames resulting inaccuracy of time-intensity curve. In this paper, we compare perfusion analyses based on motion-compensated MRI data and manual measurement. 2523. Non-Contrast-Enhanced Pulmonary MR Imaging: Comparison of Capability for Nodule Screening Between 1.5T and 3.0T MR Systems Keiko Matsumoto1, Yoshiharu Ohno1, Hisanobu Koyama1, Munenobu Nogami1, Daisuke Takenaka1, Yumiko Onishi1, Nobulazu Aoyama2, Hideaki Kawamitsu2, Tsutomu Araki3, Kazuro Sugimura1 1Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan; 2Division of Radiology, Kobe University Hospital, Kobe, Hyogo, Japan; 3Department of Radiology, University of Yamanashi, Japan Academic and social interest to radiation induced cancer development on CT examination is increasing in the world. Since 1997, several investigators have suggested that pulmonary MR imaging on 1.5T MR system has potential for nodule detection as substitution to CT. To the best of our knowledge, no one directly compare the capability of non-contrast-enhanced (non-CE) pulmonary MRI for pulmonary nodule detection between 1.5T and 3.0T MR systems. The purpose of this study was to prospectively and directly compare the capability of non-CE pulmonary MR imaging on 3.0T MR system for nodule detection than that on 1.5T MR system. 2524. Blood Supply and Vascularization of Lung Cancer, Studies by MRI and Optical Imaging Gregory Jacques Ramniceanu1, Erez Eyal2, Inbal Biton3, Nava Nevo2, Raanan Margalit4, Raya Eilam-Altstadter3, Hadassa Degani1 1Biological regulation, Weizmann Institute of Science, Rehovot, Israel; 2biological regulation, Weizmann Institute of Science, Rehovot, Israel; 3Veterinary Resources, Weizmann Institute of Science, Rehovot, Israel; 4Immunology, Weizmann Institute of Science, Rehovot, Israel The lung vasculature is composed of two systems, the bronchial and the pulmonary circulations. It is still unknown which of these two circulations, or both, contribute to the feeding of lung tumors during their progression .To answer this basic we characterize the perfusion parameters and the role of angiogenesis and interstitial fluid pressure in the lung tumors using MRI and optical imaging methods. Specifically we focus on imaging interstitial fluid pressure using a slow infusion protocol of the contrast agent. 2525. DC Gated High Resolution 3D MRI of the Human Lung Under Free Breathing Yüklə 458,11 Kb. Dostları ilə paylaş:
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