BACKGROUND AND PURPOSE Contrast-enhanced MR angiography and extracranial color-coded duplex sonography are noninvasive, preoperative imaging modalities for evaluation of carotid artery stenosis. Innovative techniques and improvements in image quality require frequent reassessment of accuracy, reliability, and diagnostic value compared with those of digital subtraction angiography (DSA). We eval...

OBJECTIVES The purpose of this study was to evaluate the diagnostic utility of sonographic elastography in differentiating reactive and metastatic axillary lymph nodes in breast cancer. METHODS A total of 64 lymph nodes (reactive, n = 33; metastatic, n = 31) from 62 patients with breast cancer were examined by both B-mode sonography and elastography from April to July 2009. Two experienced ra...

OBJECTIVE The value of sonography for the diagnosis of diseases of the peripheral nervous system is only little known. This image presentation is intended to raise the awareness of sonographers and clinicians of the potential of sonography by giving an anatomic-sonographic correlation of lower extremity peripheral nerves and an overview of commonly encountered diseases. METHODS On 2 lower ext...

Conventional sonography provides twodimensional (2D) views of three-dimensional (3D) structures that an experienced ultrasonographer has to dynamically examine in order to create their own 3D impression of the object of interest. In contrast, 3D sonography allows the simultaneous assessment of individual sectional planes, which dependent upon the particular field of interest may be examined in ...

OBJECTIVES To evaluate the accuracy of sonography in diagnosing acute appendicitis in patients with Alvarado score 4-7. METHODS This is a retrospective cross-sectional study being performed in Namazee hospital affiliated with Shiraz University of Medical sciences during a one year period from 9/2007 to 9/2008. We evaluated all patients with Alvarado score 4-7 and divided them in two groups: t...

OBJECTIVE Most pediatric emergency department (ED) visits are due to acute abdominal pain. Sonography is a reliable technique for differential diagnosis. The objective of this study was to re-appraise the role of sonography in evaluating acute abdominal pain in children. METHODS Retrospective chart review of children aged <18 years with acute abdominal pain who visited the emergency departmen...

background:   acute appendicitis is the most common emergency operation in the world. considering negative appendectomy, it is necessary to use accurate diagnostic methods to lower the rate. this study evaluated the sensitivity and specificity of abdominal sonography in comparison to clinical alvarado criteria in patients with suspected appendicitis. methods:   370 patients with suspected appen...

Hepatic artery thrombosis after liver transplantation is a devastating event requiring emergency retransplantation in most patients. Early clinical signs are often nonspecific. Before duplex sonography (combined real-time and pulsed Doppler) capability was acquired in October 1984, 76% of all transplants in this institution referred for angiography with a clinical suspicion of hepatic artery th...

Traditionally, application of ultrasound imaging on vocal fold vibration has been limited by the frame rate of dynamic sonography. When the frame rate fs is lower than half of the vibration frequency, ambiguity in the vibration frequency evident from dynamic sonography occurs. This ambiguity is known as aliasing. We exploited the aliasing effect in dynamic 2D-mode sonography to capture the vibr...

BACKGROUND Upper abdominal sonography can help physicians to confirm the diagnosis of various hepatobiliary diseases. Teaching sonography skills to medical students is important because it may enhance their level of knowledge and overall development during their gastroenterology section rotation. Sonographic imaging is abstract and students can be easily confused when scanning the abdominal str...