A low cost, quasi real-time elastography system, displacement-gradient elastography (DGE), was developed by applying digital image correlation (DIC) method and smoothing algorithm to B-mode ultrasound images. In order to achieve quasi real-time elastogram display, a new fast pattern matching algorithm, decoupled cross-correlation (DCC), was proposed and validated. By applying the DGE to various...

We demonstrate the feasibility of low-cost tabletop MR elastography (MRE) for quantifying the complex shear modulus G(∗) of small soft biological tissue samples as provided by pathologists. The MRE system was developed based on a tabletop MRI scanner equipped with a 0.5 T permanent magnet and a tissue sample holder mounted to a loudspeaker. A spin echo sequence was enhanced with motion-encoding...

Objective: To determine the role of gray scale and Doppler Ultrasound in the diagnosis of painless scrotal masses. Methodology: It was a descriptive study conducted at Department of radiology, Dow University of Health Science (DUHS) and Civil Hospital Karachi (CHK) from June 2006 to June 2007. Adult patients with painless scrotal mass referred for ultrasound examination, were included in the st...

Conventional endoscopic ultrasound „ Linear versus radial systems Endoscopic ultrasound (EUS) with f lexible endoscopes is an important diagnostic and therapeutic tool, especially for the local staging of gastrointestinal (GI) cancers, the differentiation between benign and malignant tumors, and interventional procedures, such as biopsies and stent applications. Flexible endoscopy was primarily...

The most important characteristics of an operating room ultrasound scanner are compact, mobile, real-time B-mode system and high quality image.1 Doppler capabilities, preferably color Doppler, are highly desirable and, in fact, most important in laparoscopic use to allow visualization of tubular and vascular structures. Further improvements—such as real time 3D visualization by combining severa...

Gas bubbles induced during the radiofrequency ablation (RFA) of tissues can affect the detection of ablation zones (necrosis zone or thermal lesion) during ultrasound elastography. To resolve this problem, our previous study proposed ultrasound Nakagami imaging for detecting thermal-induced bubble formation to evaluate ablation zones. To prepare for future applications, this study (i) created a...

Introduction: No studies have directly compared the accuracy of ultrasound and MRI for diagnosing medial meniscal pathology in dogs with CCL disease. Further, no assessment of ultrasound has been made when ultrasound is performed by a veterinary surgeon. Materials and Methods: A prospective clinical trial was performed in which 31 stifles in 26 dogs diagnosed with CCL disease had ultrasound, MR...

In laparoscopic surgery, live video provides visualization of the exposed organ surfaces in the surgical field, but is unable to show internal structures beneath those surfaces. The laparoscopic ultrasound is often used to visualize the internal structures, but its use is limited to intermittent confirmation because of the need for an extra hand to maneuver the ultrasound probe. Other limitatio...