#Correlation coefficient jmp how to#
#Correlation coefficient jmp registration#

#Correlation coefficient jmp registration#

Studies that evaluated different DIR algorithms, including the most common commercial software, showed reasonable overall accuracy of the registration however, they also observed large DIR errors in some of the studied cases. A multi-institution study suggested caution in globally accepting the results from deformable registration. Possible DIR uses include auto-segmentation of structures, dose accumulation, and treatment optimization. Available from: ĭeformable image registration (DIR) is extensively used in radiation therapy applications. Objective assessment of the quality and accuracy of deformable image registration.

#Correlation coefficient jmp how to#

How to cite this URL: Jurkovic IA, Papanikolaou N, Stathakis S, Kirby N, Mavroidis P. How to cite this article: Jurkovic IA, Papanikolaou N, Stathakis S, Kirby N, Mavroidis P. Keywords: 4DCT, deformable image registration, image dissimilarity indices Jacobian determinant, image similarity measures, strain tensor The evaluated measures might detect CT dataset differences with higher precision if the analysis is restricted to a smaller volume. Conclusion: A number of error and distance measures showed the best performance among the tested measures. Large differences were also observed in the results between complete and cropped datasets (coefficient of determination: 0.55 vs. The Eulerian strain tensor values indicate less tissue strain for the DMP method. The negative values of the Jacobian determinant point to non-physical behavior of the EXDMP method. The Eulerian strain tensor had smaller values for the DMP method than EXDMP in all of the studied cases. The Jacobian determinant values were always positive for the DMP method.

Results: The results indicate the same trend for several of the studied measures. All the measures and calculations were applied on to extended deformable multi pass (EXDMP) and deformable multi pass (DMP) methods. To ensure selected method's invertibility and assess resultant mechanical stress, the determinant of the Jacobian for the displacement field and 3-D Eulerian strain tensor were calculated. 23 similarity measures were used to evaluate image registration quality. Materials and Methods: 4DCT datasets were acquired for 10 lung cancer patients. Aims and Objectives: The purpose of the study was to investigate the quality, accuracy, and plausibility of three commercial image registration algorithms for 4-dimensional computed tomography (4DCT) datasets using various similarity measures. Background: The increased use of deformable registration algorithms in clinical practice has also increased the need for their validation.