Enhancement of MRI Imaging by Combining Ramp Sampling and Parallel Imaging Techniques in Cerebral Tumors
Our aim was to decrease geometric distortion artifact in DWI on brain by using different MR techniques such as ramp sampling and parallel imaging. The study was done on 15 patients, They were subject to routine brain MRI examination for different symptoms, examination was done on 1.5 T scanner, patients were divided to three group five patient in each group, geometric distortion in frontal and occipital lobe measured in the routine acquired DWI and after used the interested strategy compared to anatomical T2-FSE acquired in the routine examination then reduction percentage for each strategy was calculated. Application of parallel technique imaging showed significant artifact reduction in frontal lobe with approximately 54.36 % and about 34.8% in occipital lobe, while ramp sampling showed reduction with approximately 19% in frontal lobe and reduced artifact by 41.58% in the occipital lobe.
Finally we conclude that using new techniques such as ramp sampling and parallel imaging used with EPI data acquisition reduced geometric distortion artifact and increased geometric resolution.
Le Bihan, D., Poupon, C., Amadon, A., & Lethimonnier, F. (2006). Artifacts and pitfalls in diffusion MRI. Journal of Magnetic Resonance Imaging: An Official Journal of the International Society for Magnetic Resonance in Medicine, 24(3), 478-488.D. K. Jones, Diffusion MRI: Theory, Methods, and Applications. Oxford University Press, Inc., 2011.
C Bhushan, J.P Haldar, A.A Joshi, R.M Leahy, “Correcting Susceptibility-Induced Distortion in Diffusion-Weighted MRI using Constrained Nonrigid Registration,” Signal and Information Processing Association Annual Summit and Conference (APSIPA), Asia-Pacific, 2012.
K. Kantarci, R. Avula, M. Senjem, A. Samikoglu, B. Zhang,S. Weigand, S. Przybelski, H. Edmonson, P. Vemuri, D. Knopman, T. Ferman, B. Boeve, R. Petersen, and C. Jack, “Dementia with Lewy bodies and Alzheimer disease: Neurodegenerative patterns characterized by DTI,” Neurology, vol. 74, no. 22, pp. 1814-1821, 2010.
J. L. R. Andersson and S. Skare, “Image distortion and its correction in diffusion MRI," in Diffusion MRI: Theory, Methods, and Applications (D. K. Jones, ed.), 2010.
P. Jezzard and R. S. Balaban, “Correction for geometric distortion in echo planar images from B0 field variations," Magnetic Resonance in Medicine, vol. 34, no. 1, pp. 65-73, 1995.
D. K. Jones and M. Cercignani, “Twenty five pitfalls in the analysis of diffusion MRI data," NMR in Biomedicine, vol. 23, no. 7, pp. 803-820, 2010.
C. Studholme, R. T. Constable, and J. S. Duncan, “Accurate alignment of functional EPI data to anatomical MRI using a physics-based distortion model," IEEE Transactions on Medical Imaging, vol. 19, pp. 1115 -1127, nov. 2000.
M. O. Irfanoglu, L. Walker, J. Sarlls, S. Marenco, and C. Pierpaoli, “Efects of image distortions originating from susceptibility variations and concomitant fields on diffusion MRI tractography results," NeuroImage, vol. 61, no. 1, pp. 275 -288, 2012.
K. V. Embleton, H. A. Haroon, D. M. Morris, M. A. L. Ralph, and G. J. Parker, “Distortion correction for diffusion-weighted MRI tractography and fMRI in the temporal lobes," Human Brain Mapping, vol. 31, no. 10, pp. 1570-1587, 2010.
Oghabian, M. A., Faeghi, F., & Tohidnia, M. R. (2012). Effect of phase-encoding reduction on geometric distortion and BOLD signal changes in fMRI. Iranian Journal of Medical Physics, 9(4), 275-281.
Andrä, W., & Nowak, H. (Eds.). (2007). Magnetism in medicine: a handbook. John Wiley & Sons.
J. sanchez- Gonzalez: How to identify and avoid artifacts in DWI. A. Luna et al., Diffusion MRI Outside the Brain, DOI 10.1007/978-3-642-21052-5_2, Springer-Verlag Berlin Heidelberg 2012
Gamal Fathalla M. Mahdaly, “Geometric distortion artifact remedy in DWI: A novel comprehensive approach,” OMICS J Radiology, August 14-16, Holiday Inn Chicago-North Shore, IL, USA, 2013.
A Gholipour, N Kehtarnavaz, B Scherrer, S.K Warfield, “On the Accuracy of Unwarping Techniques for the Correction of Susceptibility-Induced Geometric Distortion in Magnetic Resonance Echo-Planar Images,” IEEE engineering in medicine and biology society. Annual conference, 6997-700, 2011.
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