This paper presents a new robotic mechanism for ultrasound imaging. The device is placed on a patient's body by an operator, and an ultrasound expert controls the motions of the device to obtain ultrasound images. The paper focuses on the robotic mechanism that performs ultrasound imaging. The design of the mechanism is based on two approaches to produce center of motion for an ultrasound probe...

With relatively high frame rates and the ability to acquire volume data sets with a stationary transducer, 3D ultrasound systems, based on matrix phased array transducers, provide valuable three-dimensional information, from which quantitative measures of cardiac function can be extracted. Such analyses require segmentation and visual tracking of the left ventricular endocardial border. Due to ...

It is known that neither onenor two-dimensional ordinary differential equations can exhibit chaotic phenomena, while such behaviour is possible in threedimensional systems. Here it is shown that the solutions of any dissipative equation can be approximated arbitrarily closely by the trajectories of an appropriate threedimensional system. This class includes the Navier-Stokes equations, showing ...

A new test for embedding time series data from low-dimensional chaotic systems into threedimensional phase spaces is proposed. It is topological, depending on specific invariant structures within a data set, rather than statistical averages over the entire attractor. We illustrate this test by applying it to electrolytic data. Although it can only be used to test for threedimensional embeddings...

We describes a method for manipulating a threedimensional object without considering conventional three independent orthogonal views. We apply the direct manipulation method to operate the threedimensional object. We propose \augmented manipulation" method which is an enhanced direct manipulation technique by using additional information. We implement three-dimensional modeling tool \Claymore" ...

the outcome and proper management of fetal hydronephrosis have not been completely defined. the purpose of this study was to determine incidence and outcome of infants with a history of prenatal hydronephrosis diagnosed by ultrasound. in a three-year period from 2000 to 2003 we identified 211 cases (271 renal units) of fetal hydronephrosis in which renal pelvic anteroposterior diameter was more...

A new graph algorithm for multiscale segmentation of threedimensional medical data sets is presented. It is a threedimensional generalisation of an existing two-dimensional Mumford-Shah region-merging segmentation algorithm. The Mumford-Shah functional formulation leads to improved segmentation results compared to alternative approaches; the graph theoretic approach yields improved performance ...