Biomedical subjects

Nick J Avis

Publications and source records attributed to Nick J Avis.

3 recordsLinked to original sources

PubMed2005

Grid enabled remote visualization of medical datasets.

We present an architecture for remote visualization of datasets over the Grid. This permits an implementation-agnostic approach, where different systems can be discovered, reserved and orchestrated without being concerned about specific hardware configurations. We illustrate the utility of our approach to deliver high-quality interactive visualizations of medical datasets (circa 1 million triangles) to physically remote users, whose local physical resources would be otherwise overwhelmed. Our architecture extends to a full collaborative, resource-aware environment, whilst our presentation details our first proof-of-concept implementation.

Database Management Systems↗

PubMed2005

Surface scanning soft tissues.

We investigate and report a method of 3D virtual organ creation based on the RGB color laser surface scanning of preserved biological specimens. The surface attributes of these specimens result in signal degredation and increased scanning time. Despite these problems we are able to reproduce 3D virtual organs with both accurate topology and colour consistency capable of reproducing pathological lesions.

Color↗

PubMed2004

Evaluation of the mechanical properties of human liver and kidney through aspiration experiments.

A proper mechanical characterization of soft biological tissues of the human body has a strong impact on several medical applications such as surgical planning, virtual reality simulators, trauma research, and for diagnostic purposes. Adequate experimental data are needed to describe quantitatively the mechanical behaviour of those organs. We present a technique for the acquisition of such data from soft tissues and its post processing, based on a continuum mechanics approach, to determine some parameters of the tissue's mechanical properties. A small tube is applied to the target organ and a weak vacuum is generated inside the tube according to a predefined pressure history. A video camera grabs images of the deformation profile of the aspirated tissue, and a pressure sensor measures the correspondent vacuum level. The images are processed and used to inform the fitting of uniaxial and continuum mechanics models. Whilst the aspiration test device is suitable for in vivo applications, under sterile conditions during open surgery, we hereby present first results obtained by testing cadaveric tissues.

Biomechanical Phenomena↗