Detection and correction of geometric distortion in 3D CT/MR images
نویسندگان
چکیده
1.Philips Medical Systems, EasyVision Modules Advanced Development, Building QP1 P. O. Box 10.000, 5680 DA Best, The Netherlands 2.Philips Research Laboratories, Division Technical Systems Röntgenstrasse 24-26, 22335 Hamburg, Germany 3.The National Hospital London, University Department of Neurosurgery, Institute of Neurology Queen Square, London WC1N 3BG, United Kindom 4.Knappschaftskrankenhaus, Institut für Radiologie & Nuklearmedizin, Klinikum der Ruhr, Universität Bochum In der Schornau 23 25, D-44892 Bochum, Germany
منابع مشابه
Design, Construction and Evaluation of an Anthropomorphic Head Phantom for Assessment of Image Distortion in Stereotactic Radiosurgery Planning Systems
Introduction: In recent years, the use of magnetic resonance (MR) images in radiation treatment planning has drawn considerable attention. However, although the extent of a tumor can be determined in great detail on MR images, the geometric accuracy of these images is limited by distortions stemming from the inhomogeneity of the static background magnetic field, the nonlineari...
متن کاملFabrication of New 3D Phantom for the measurement of Geometric Distortion in Magnetic Resonance Imaging System
Introduction: Geometric distortion, an important parameter in neurology and oncology. The current study aimed to design and construct a new three-dimensional (3D) phantom using a 3D printer in order to measure geometric distortion and its 3D reproducibility. Material and Methods: In this study, a new phantom ...
متن کاملFabrication of New 3D Phantom for Measuring Geometric Distortion in Magnetic Resonance Imaging System
Introduction: Geometric distortion is a major shortcoming of magnetic resonance imaging (MRI), which has an important influence on the accuracy of volumetric measurements, an important parameter in neurology and oncology. Our goal is to design and construct a new three- dimensional phantom using a 3D printer in order to measure geometric distortion and its reproducibility in...
متن کاملGeometric distortion evaluation of magnetic resonance images by a new large field of view phantom for magnetic resonance based radiotherapy purposes
Background: The magnetic resonance imaging (MRI)-based radiotherapy planning method have been considered in recent years because of the advantages of MRI and the problems of planning with two images modality. The first step in MRI-based radiotherapy is to evaluate magnetic resonance (MR) images geometric distortion. Therefore, the present study aimed to evaluate system related geometric distort...
متن کاملAssessment of Reproducibility of Geometric Distortion in MRI using Phantom Measurements
Introduction: Image distortion is one of the major problems of magnetic resonance imaging (MRI) for use in 3DMRI, velocity MRI, FMRI and radiotherapy treatment planning (RTTP). It is widely known that the most obvious effect of the inhomogenity of the magnetic fields and the nonlinearity of the gradient is the Geometric Distortion of MR tomograms. In this study, the...
متن کامل