Abstract: An apparatus is provided that includes a processor configured to receive data representative of points on a touch-sensitive surface with which an object comes into contact to initiate and carry out a trace or movement interaction with the surface. In this regard, the trace is defined by a shape formed by the points, and the movement interaction is defined by movement reflected by the points. The processor is configured to determine if the contact is initiated to carry out a trace or movement interaction based on the data. The contact is initiated to carry out a trace if contact of the object is made and the object is held substantially in place for a period of time, the determination being made. The processor is then configured to interpret the data based on the determination to thereby direct interaction with media presented on the corresponding display based on the interpretation.

Abstract: Intraoperative ultrasound (US) is integrated with stereotactic systems, where a system interactively registers two-dimensional (2D) US and three-dimensional (3D) magnetic resonance (MR) images. The registration is based on tracking a US probe with a bC magnetic position sensor. A transformation algorithm is performed to transform coordinates of points between two different spaces, where MR and US image spaces are independently registered with the position sensor space and where coordinate points can be registered between the MR and US spaces. A calibration procedure can be performed, and a phantom can be used to determine and analyze registration errors. The registered MR images can reconstructed using either zero-order or first-order interpolation.

Abstract: An apparatus for correcting an X-ray tomographic image is presented, where the tomographic image is created by measuring an X-ray transmission coefficient at each of a plurality of X-ray beam paths through an object to enable reconstructing a tomographic image of the object. There is a device for selecting a plurality of volume averaged voxels along at least one of the X-ray beam ray paths, and for placing contiguous volume averaged voxels in a run length of volume averaged voxels, to make a plurality of run lengths of volume averaged voxels. There is a device for dividing the plurality of run lengths of volume averaged voxels into a plurality of subslices. There is a device, responsive to the plurality of subslices and responsive to the plurality of run lengths of volume averaged voxels, for computing a corrected value of X-ray attenuation coefficient for the X-ray beam ray path.