Learn More
BACKGROUND Subtraction of ictal and interictal single photon emission computed tomography (SPECT) images is known to be successful in localizing the seizure focus in the pre-surgical evaluation of patients with partial epilepsy. A computer-aided methods for producing subtraction ictal SPECT co-registered to the magnetic resonance image (MRI) (the SISCOM(More)
Understanding and explaining perception of touch is a non-trivial task. Even seemingly trivial differences in exploration may potentially have a significant impact on perception and levels of discrimination. In this study, we explore different aspects of contact related to stiffness perception and their effects on the just noticeable difference (JND) of(More)
Subtraction of ictal and interictal single-photon emission computed tomography (SPECT) images is known to be successful in localizing the seizure focus in presurgical evaluation of patients with partial epilepsy. The subtracted images are also aligned with a patient's high-resolution magnetic resonance image (MRI) and fused to identify the anatomical(More)
In order to simulate both physically and visually realistic soft tissue deformations, the Finite Element Method (FEM) is the most popular choice in the literature. However it is non-trivial to model complex behaviour of soft tissue with sufficient refresh rates, especially for haptic force feedback which requires an update rate of the order of 1 kHz. In(More)
Virtual coupling, a spring-damper system between the haptic probe and its virtual representation, the proxy, is one of the most common approaches for haptic rendering. We have extended the virtual coupling by updating the spring stiffness, sometimes used to simulate compliance of a material, depending on the direction between the proxy and the probe. This(More)
* Subtraction of ictal and interictal SPECT images is known to be successful in localizing the seizure focus in presurgical evaluation of patients with partial epilepsy. Computer-aided method for producing subtraction ictal SPECT coregistered to MRI (SISCOM method) is commonly used. There are two registrations involved in SISCOM: between the(More)
  • 1