Purpose Computed tomography (CT) is inferior to magnetic resonance imaging (MRI) in cervical tumor delineation, but similar in identification of organs at risk (OAR). The trend to over-estimate high-risk and low-risk clinical target volume (HRCTV, IRCTV) on CT can lead to under-estimation of dose received by 90% (D90) of the 'actual' CTV. This study aims to evaluate whether CT-guided planning d...

Lesion guided radiofrequency thermocoagulation (L-RFTC) via stereotactically inserted coagulation probes is a further development of stereotactic thermocoagulation thalamotomy and stereo-EEG guided RFTC. In this method epileptogenic lesions detected via magnetic resonance imaging (MRI) move to the center of coagulation planning. Two surgical strategies can be applied: lesion disconnection and l...

We explain how most conventional approaches to the problem of visually guided robot navigation are fundamentally restricted. Starting with a specification of the requirements of a general purpose visually guided robot which includes, robustness, autonomy, flexibility and scalability, we then develop an approach to the solution of map building and path planning which operates within a learning f...

Diffuse axonal injury caused by mild closed head injury (CHI) is likely to affect the neural networks concerned with the planning and execution of sequences of memory-guided saccades. Thirty subjects with mild CHI and thirty controls were tested on 2- and 3-step sequences of memory-guided saccades. CHI subjects showed more directional errors, larger position errors, and hypermetria of primary s...

BACKGROUND The shift from conventional two-dimensional (2D) to three-dimensional (3D)-conformal target definition and dose-planning seems to have introduced volumetric as well as geometric changes. The purpose of this study was to compare coverage of computed tomography (CT)-based breast and boost planning target volumes (PTV), absolute volumes irradiated, and dose delivered to the organs at ri...

Medical image fusion plays an important role in clinical applications such as image-guided surgery, image-guided radiotherapy, noninvasive diagnosis, and treatment planning. In order to retain useful information and get more reliable results, a novel medical image fusion algorithm based on pulse coupled neural networks (PCNN) and multi-feature fuzzy clustering is proposed, which makes use of th...

MOTT, BRADFORD WAYNE. Decision-Theoretic Narrative Planning for Guided Exploratory Learning Environments. (Under the direction of James C. Lester and R. Michael Young.) Interactive narrative environments have been the focus of increasing attention in recent years. A key challenge posed by these environments is narrative planning, in which a director agent orchestrates all of the events in an in...

Although previous studies have attempted to address the challenge of land subdivision, there is still a scarcity in the literature on how the extent of conformity to land subdivision planning regulations may be statistically and spatially analyzed. This study, therefore, explores the extent to which residential developers comply with land subdivision planning regulations in Kenya, a case study ...

Ultrasound-guided percutaneous biopsy of visceral organs in the abdomen has been in effect for many years. Paul Ehrlich is credited with performing the first percutaneous liver biopsy in 1883 in Germany. Schüpfer in 1907 published the first liver biopsy series. Huard and Baron popularized liver biopsy for general purposes in the1930s. Some of the more contemporary articles reporting ultrasound-...