A robotic system is presented that uses threedimensional ultrasound to visually servo a surgical instrument. Tracking of both the surgical instrument and a target was done using image based algorithms on the real-time 3D ultrasound data. The tracking techniques are shown to be especially amenable for execution on powerful graphics processor units. By harnessing a graphics card, it was possible ...

ActiveVessel is a new multimedia workstation which enables the visualization, acquisition and handling of both image modalities, onand offline. It enables DICOM v3.0 decompression and browsing, video acquisition, reproduction and storage for IntraVascular UltraSound (IVUS) and angiograms with their corresponding ECG, automatic catheter segmentation in angiography images (using fast marching alg...

Image-guided surgery systems are often used to provide surgeons with informational support. Due to several unique advantages such as ease of use, real-time image acquisition, and no ionizing radiation, ultrasound is a common medical imaging modality used in image-guided surgery systems. To perform advanced forms of guidance with ultrasound, such as virtual image overlays or automated robotic ac...

Ultrasound particle image velocimetry (PIV) can be used to obtain velocity fields in non-transparent geometries and/or fluids. In the current study, we use this technique to document the flow in a curved tube, using ultrasound contrast bubbles as flow tracer particles. The performance of the technique is first tested in a straight tube, with both steady laminar and pulsatile flows. Both experim...

Ultrasound technology has improved markedly in the past 10 to 15 years, prompting echocardiographers to extend its use in studying cardiac structure and function. New ultrasound equipment and techniques offer superior image quality, greater accuracy, and expanding capabilities. As a result, more and improved imaging modalities are available for evaluating cardiac anatomy, ventricular function, ...

A 35-year-old-woman presented to us for her third IVF treatment cycle. She had had a Cesarean delivery 7/2 months earlier following a successful IVF treatment. She had had an uneventful recovery from the operation. After delivery she had two menstrual periods then decided to start a new IVF treatment cycle. She had her first ultrasound scan on cycle day (CD) 9, which was performed before the lu...

Reconstruction using osteocutaneous fibular free flap after radical resection of oral cancer with mandibular invasion and segmental mandibulectomy is the gold standard treatment. Recent technological advances have made virtual surgical planning threedimensional printing incorporating computer-aided design modeling possible, thereby shortening ischemic time enabling more sophisticated reconstruc...