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2D Rigid Registration of MR Scans using the 1D Binary Projections

Kotsas P.D..


Institution:	Department of Automated Control and System Engineering, University of Sheffield, UK.
Publisher:	Enformatika Transactions on Engineering, Computing and Technology
Publication Date:	Nov-2005
Citation:	Enformatika Transactions on Engineering, Computing and Technology, November 2005; 9:157-161.
Appears in Collections:	SLICER
Generated Citation:	Kotsas P.D.. 2D Rigid Registration of MR Scans using the 1D Binary Projections. Enformatika Transactions on Engineering, Computing and Technology, November 2005; 9:157-161.
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This research deals with the application of a signal intensity independent registration criterion for 2D rigid body registration of medical images using 1D binary projections. The criterion is defined as the weighted ratio of two projections. The ratio is computed on a pixel per pixel basis and weighting is performed by setting the ratios between one and zero pixels to a standard high value. The mean squared value of the weighted ratio is computed over the union of the one areas of the two projections and it is minimized using the Chebyshev polynomial approximation using n=5 points. The sum of x and y parallel projections is used for translational adjustment and a range of parallel projections between 40-50 deg (depending on the orientation of the image) for rotational adjustment. MR-MR registration experiments were performed and gave mean errors well below 1deg and 1 pixel (0.12 deg and 0.47 pixels for the example given in Enformatika Publication). The method is to be extended for surface matching.

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