WebDec 26, 2015 · Annual ultrasound examination is recommended as sonographic changes may be identified in the absence of abnormality on biochemical assessment. 2 The liver may be hyperechoic and the texture becomes coarse and nodular as fibrosis develops ( Fig. 9.1 ). Increased periportal echogenicity may be demonstrated. Doppler ultrasonography (US) is usually the first-line modality for evaluating flow in native liver vessels and transjugular intrahepatic portosystemic shunts (TIPS). Waveforms, which represent flow in each of the major vessels and in TIPS, have been well described. The appearance of these waveforms should be … See more In this article, we review the terminology used in vascular Doppler US and the basic concepts of flow dynamics in vessels. In addition, we describe the normal waveforms, as well as abnormal waveforms and their … See more The nomenclature becomes somewhat confusing due to discrepancies between the technically correct terms and the more commonly used … See more The term Doppler should be capitalized because it is an eponym named after Christian Johann Doppler (18031853), the Austrian physicist who first described the effect (7). Although mentioning this may seem a bit patronizing … See more Spectral Doppler US findings are displayed with the spectral waveform at the bottom of the screen and a color Doppler image at the top (Fig 2). … See more

State-of-the-Art Cranial Sonography: Part 1, Modern Techniques …

WebJan 1, 1994 · The highest quality breast sonograms are achieved with 5-10-MHz linear transducers, imaging the lesion within the transducer focal zone, and relatively steep time-gain compensation curves. On sonograms, the fat in normal breast parenchyma is hypoechoic, fibrous tissue is echogenic, and glandular tissue is intermediate in … WebFeb 11, 2024 · Posttreatment monitoring of injury or disease can also be performed, whereby high-frequency US can be used to evaluate therapeutic response, relapse, and posttreatment complications. In addition to the aforementioned applications, US can also be used in the context of promoting skin aesthetics. shrieks definition

Ultrasound of the paediatric abdomen Radiology Key

WebApr 29, 2024 · Most ultrasound waves are reflected at the pleura in an air-filled lung owing to the acoustic impedance mismatch at the air and soft-tissue interface that results in a hyperechoic pleural line ( 53 ). Thus, the air-filled lung parenchyma cannot be directly visualized at US. WebUltrasound technology has advanced significantly in recent years, although application of newer imaging protocols has been slow to catch on. With implementation of modern protocols, ultrasound is highly sensitive and accurate for the … WebNov 18, 2024 · TIPS evaluation is useful to ensure that a transjugular intrahepatic portosystemic shunt (TIPS) is working properly and that no stenosis has occurred within … shrieks antonym