PURPOSE to assess the distance of the fetal cerebral fissures from the inner edge of the skull by three-dimensional ultrasonography (3DUS). METHODS this cross-sectional study included 80 women with normal pregnancies between 21st and 34th weeks. The distances between the Sylvian, parieto-occiptal, hippocampus and calcarine fissures and the internal surface of the fetal skull were measured. Fo...

Visualization of the brain's midline structures or of an intracranial mass lesion and detection of ventricular landmarks are the main goals of the ultrasonic (US) techniques in clinical neurology. While investigating the structures in the mid-sagittal plane of the head responsible for the midline echo by A-mode or unidimensional techniques (see Fig. 1), Gordon (1959), and de Vlieger and Ridder ...

Ultrasonography (US) is the most recent cross-sectional imaging modality to acquire three-dimensional (3D) capabilities. The reconstruction of volumetric US data for multiplanar display took a significantly longer time to develop in comparison with computed tomography and magnetic resonance imaging. The current equipment for 3D-US is capable of producing high-resolution images in three differen...

The 2003 Rotterdam diagnostic criteria for polycystic ovary syndrome (PCOS) support the objective role of ultrasound in defining the appearance of the PCO, but there are significant limitations of these new guidelines from an ultrasound perspective that must be considered. Three-dimensional (3D) ultrasound provides a new method for the objective quantitative assessment of follicle count, ovaria...

For the last years three-dimensional ultrasonography has become an imaging diagnosis method of great importance in obstetrics. One of its advantages would be the higher sensitivity compared with two-dimensional ultrasound in the diagnosis of some fetal malformations. The potential applications of this new method would be an improved accuracy in the measurement of fetal organs, the possibility o...

Advanced medical imaging and visualization has a strong impact on research and clinical decision making in gastroenterology. The aim of this paper is to show how imaging and visualization can disclose structural and functional abnormalities of the gastrointestinal (GI) tract. Imaging methods such as ultrasonography, magnetic resonance imaging (MRI), endoscopy, endosonography, and elastography w...

Conjoined twinning is a rare abnormality and cephalopagus is a very rare form of conjoined twins. We report a case of cephalopagus conjoined twins with encephalocele and omphalocele which diagnosed by ultrasonography and ultrafast magnetic resonance (MR) imaging at 24 weeks of the gestation. Ultrafast MR imaging can provide image quality superior to two dimensional ultrasonography and should be...

Modern ultrasound imaging for diagnostic purposes has a wide range of applications. It is used in obstetrics to monitor the progress of pregnancy, in oncology to visualize tumours and their response to treatment, and, in cardiology, contrast-enhanced studies are used to investigate heart function and physiology. An increasing use of diagnostic ultrasound is to provide the first photograph for b...

Three-dimensional ultrasound is a powerful imaging technique, but it requires thousands of sensors and complex hardware. Very recently, the discovery of compressive sensing has shown that the signal structure can be exploited to reduce the burden posed by traditional sensing requirements. In this spirit, we have designed a simple ultrasound imaging device that can perform three-dimensional imag...

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...