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...

PURPOSE To introduce a commercially available three-dimensional ultrasonography unit into everyday clinical practice and to evaluate the qualitative and quantitative information of the acquired images and to clarify the indications for 3-D echography. MATERIALS AND METHODS 3-D scanning was performed on 59 referred patients with indications for conventional B/A-scan. On 7 patients with an intr...

Medical ultrasound imaging has advanced dramatically since its introduction only a few decades ago. This paper provides a short historical background, and then briefly describes many of the system features and concepts required in a modern commercial ultrasound system. The topics addressed include array beam formation, steering and focusing; array and matrix transducers; echo image formation; t...

Ultrasound is a valuable diagnostic tool widely used in medicine. Recently, high-frequency ultrasonography has been introduced to dermatology owing to technical advances. Currently, the most often used frequency for skin imaging is between 20 and 25 MHz. Ultrasound images can be generated in different modes, i.e. one-dimensional A mode, two-dimensional B mode and C mode. This type of skin imagi...