Ultrasound images of the heart are obtained by a probe placed on the patient's chest. The resultant image is a triangular plane with its base in the middle of the body and the tip close to the probe on the chest. Thus, image planes with a different orientation (e.g. parallel to the surface of the body) are impossible to obtain. The aim of current 3D ultrasound of the heart is to provide the phy...

Ultrasound probes are used in sonographic scanning and are commonly used as either surface probes or endocavitary probes. Surface probes are used on intact skin, such as the abdomen; they are considered noncritical and require at least low-level disinfection between patients. Endocavitary probes (eg, transvaginal, transrectal, or transesophageal probes) are considered semicritical because they ...

Segmentation of bone surface in ultrasound images has numerous applications in computer aided orthopedic surgery. A robust bone surface extraction technique for ultrasound images can be used to non-invasively probe the bone surface. In this work, we present early results with an intuitive and computationally inexpensive bone segmentation approach. The prior knowledge about the appearance of bon...

OBJECTIVE To evaluate the integration and accuracy of A (amplitude)-mode ultrasound-based surface matching for noninvasive registration of the head into a frameless computer-aided surgery system for otorhinology and skull base surgery. DESIGN Experimental study and case series. SETTING Academic medical center. PATIENTS Twelve patients underwent anterior and paranasal skull base surgery wi...

Conventional ultrasound examination of the articular cartilage performed externally on the body surface around the joint has limited accuracy due to the inadequacy in frequency used. In contrast to this, minimally invasive arthroscopy-based ultrasound with adequately high frequency may be a better alternative to assess the cartilage. Up to date, no special ultrasound transducer for imaging the ...

We are developing techniques for guiding ultrasound probes and other clinical tools with respect to the exterior of the patient, using one or more video camera(s) mounted directly on the probe or tool. This paper reports on a new method of matching the real-time video image of the patient’s exterior against a prior high-resolution surface map acquired with a multiple-camera imaging device used ...

Acquisition of ultrasound data negatively affects image registration accuracy during image-guided therapy because of tissue compression by the probe. We present a novel compression correction method that models sub-surface tissue displacement resulting from application of a tracked probe to the tissue surface. Patient landmarks are first used to register the probe pose to pre-operative imaging....

BACKGROUND Transrectal ultrasound (TRUS)-guided prostate biopsies are among the most common outpatient diagnostic procedures in urology clinics and carry the risk of introducing pathogens that may lead to infection. OBJECTIVE To investigate the effectiveness of procedures for disinfecting a probe used in ultrasound-guided prostate biopsy. METHOD The effectiveness of disinfection was determi...

A new algorithm for creating artificial images (phantoms) of ovaries is presented. The entire process of a phantom formation is divided into two parts. First, an ovary with ovarian follicles is modelled. The ovary is approximated with a cube, while the follicles are assumed ellipsoids with excrescences on their surface. Afterwards a model of the ultrasound scanning process is set. The probe is ...

Objective: To evaluate the integration of ultrasound Amplitude (A)-mode based surface matching for non-invasive registration of the head into a frameless computer aided surgery system for Oto-Rhinology and Skull Base Surgery, and its accuracy. Design: Experimental study and case series. Setting: Academic medical center. Patients: Twelve patients underwent anterior/para-nasal skull base surgery ...