the purpose of this study was to examine the effect of self-control feedback on relative and absolute timing through observational and physical practices. participants (n=90) were randomly assigned to physical and observational practice (self-control, yoked, and instructor kr) groups. they practiced a sequential timing task, which required participants to press four keys (2, 6, 8, and 4) respec...

PURPOSE To determine the effect of proximal flow arrest on the frequency and timing of distal embolic events during occlusion of the common femoral artery with detachable coils. METHODS Twenty-three complex fibered platinum coils were delivered into 10 common femoral arteries without proximal flow arrest. The arteries were continuously monitored for flow and embolic events by Doppler sonograp...

conclusions sonography is valuable method in diagnosis pneumothorax in unstable patients after invasive thoracic procedures. background ultrasound is the choice modality in the unstable patients and after performing certain procedures, such as a thoracentesis or the placement of a central venous line, which helps to rule out an iatrogenic pneumothorax. upright ap radiograph has less sensitivity...

background evaluation of the accuracy and performance of sonography units needs tissue-mimicking phantoms. these phantoms play an important role by simulating soft tissues, obviating the need to experiment on humans or animals. objectives to present a simple sonographic phantom for quality control and training purposes. materials and methods the presented phantom consists of a two-part plexigla...

abstract background: evaluation of breast masses in women under 40 years old starts with a triple test score (tts) which is composed of clinical breast examination, mammography and fine needle aspiration. increased breast density in this age group decreases the sensitivity of mammography. so deciding whether to biopsy such nondiagnostic lesions or not is subject to challenge. breast masses up t...

OBJECTIVE Worldwide, the use of sonography for the evaluation of the musculoskeletal system has been growing. However, radiologists in North America have been relatively slow to incorporate musculoskeletal sonography into their practices. The purpose of this article is to show the advantages of musculoskeletal sonography. CONCLUSION Musculoskeletal sonography is an important complementary too...

We present a case of submandibular duct calculi diagnosed using transoral sonography. Sonography is the first-line imaging modality of salivary gland calculi. However, it is performed via a transcutaneous approach, which is limited in identifying small salivary duct calculi. Using an intraoral transducer, transoral sonography can visualize the submandibular duct and detect the presence of small...

BACKGROUND The diagnosis of esophageal atresia may be suspected on prenatal ultrasound scan in fetuses with a small or absent stomach or unexplained polyhydramnios. However, these findings are thought to have a low positive predictive value and clinical decisions affecting timing or site of delivery may be made erroneously. The authors evaluated the accuracy of fetal sonography followed by magn...