What is the normal echotexture of tendons and ligaments? Normal tendons are hyperechoic with a signature fibrillar echotexture. Ligaments are also hyperechoic but can be differentiated from tendons due to their more compact, finely striated echotexture. Additionally, ligaments may be discerned from tendons as they connect two osseous structures
What is the normal echotexture of peripheral nerves? Peripheral nerves demonstrate a fascicular appearance in which individual nerve fascicles are hypoechoic. The hypoechoic fascicles are surrounded by hyperechoic connective tissue referred to as epineurium. Large peripheral nerves will often be surrounded by a rim of hyperechoic fat. Short axis imaging is often helpful to clarify …
Which soft tissue masses can be diagnosed on Ultrasound? Although US findings are often nonspecific for the characterization of soft tissue masses, there are several instances in which US is diagnostic. US is very helpful at differentiating cystic from solid masses. A simple cyst should appear anechoic on US with increased through transmission and thin, …
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What is the normal sonographic appearance of various soft tissues (skin, subcutaneous fat, fascia, cortical bone, hyaline cartilage, fibrocartilage, and muscle)? The epidermis and dermis of the skin typically appear as a thin hyperechoic layer. Subcutaneous fat is hypoechoic with thin linear echogenic septations paralleling the skin surface. Fascia appears as a thin, linear hyperechoic …
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What are the commonly used transducers in musculoskeletal Ultrasound? In musculoskeletal ultrasound, various transducers can be used depending on the specific area being examined and the depth of the structures being imaged. Here are some commonly used transducers in musculoskeletal ultrasound: Linear array transducer: This transducer has a linear shape and is often used for …
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What is anisotropy, and how can this be used to differentiate among soft tissue structures? Anisotropy refers to the variation of ultrasound interaction with fibrillar tissues and is primarily observed when evaluating tendons and ligaments. For example, when the ultrasound beam is directed perpendicular to a structure such as a tendon, the typical hyperechoic fibrillar …
How are images oriented in musculoskeletal Ultrasound? The convention in musculoskeletal US imaging is to have the notch of the transducer directed to the patient’s head or the patient’s left side. Images are described as being in “long axis” or “short axis” to the structure being imaged, corresponding to “longitudinal” and “transverse” planes in body …
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