ANATOMY
MUSCULOSKELETAL AND SOFT TISSUE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Apply pressure with the probe
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Twist the probe 90 degrees
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Angle probe so that it is parallel to the area of concern
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Use Doppler
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Detailed explanation-1: -Anisotropy occurs when the angle of the ultrasound beam is not perpendicular to the tissue being scanned. This causes the sound waves to be scattered rather than reflected back to the transducer/receiver; this results in loss of signal, which is presented as a hypoechoic area in linear structures such as tendons.
Detailed explanation-2: -Anisotropy is an artifact encountered in ultrasound, notably in muscles and tendons during a musculoskeletal ultrasound. In musculoskeletal applications, the artifact may prompt an incorrect diagnosis of tendinosis or tendon tear.
Detailed explanation-3: -The anisotropic effect in ultrasound is when tissues show abnormal echogenicity, typically loss of echogenicity, due to an oblique insonating angle, suggesting the presence of a pathological condition(7). In the musculoskeletal system, this symptom is commonly encountered, potentially prompting misdiagnosis.
Detailed explanation-4: -1, 2 Tendons and ligaments particularly have oriented anisotropic structural properties for transfer and control of force.