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The reflected ultrasound is received by the probe, transformed into an electric impulse as voltage, and sent to the engine for signal processing and conversion to an image on the screen. The depth reached by the ultrasound beam is dependent on the frequency of the probe used. The higher the frequency, the lesser the depth reached. [9]
Mulder's sign is a physical exam finding associated with Morton's neuroma, which may be elicited while the patient is in the supine position on the examination table. The pain of the neuroma, as well as a click, can be produced by squeezing the two metatarsal heads together with one hand, while concomitantly putting pressure on the interdigital space with the other hand.
An ABPI between and including 0.90 and 1.29 considered normal (free from significant PAD), while a lesser than 0.9 indicates arterial disease. [14] An ABPI value of 1.3 or greater is also considered abnormal, and suggests calcification of the walls of the arteries and incompressible vessels, reflecting severe peripheral vascular disease .
A-scan ultrasound biometry; Abdominal ultrasonography; Acorn cyst sign; Acoustic angiography; Advanced Diagnostic Ultrasound in Microgravity; Air polymer-type A; American Institute of Ultrasound in Medicine; American Registry for Diagnostic Medical Sonography; American Society of Echocardiography; Ankle–brachial pressure index; Anomaly scan ...
The dorsalis pedis artery is located 1/3 from medial malleolus of the ankle. It arises at the anterior aspect of the ankle joint and is a continuation of the anterior tibial artery . [ 1 ] [ 2 ] It ends at the proximal part of the first intermetatarsal space.
Tarsal tunnel syndrome is the most commonly reported nerve entrapment of the ankle. It is analogous to carpal tunnel syndrome in the wrist.It is caused by compression of the tibial nerve underneath the flexor retinaculum of the foot. [1]
3D ultrasound is a medical ultrasound technique, often used in fetal, cardiac, trans-rectal and intra-vascular applications. 3D ultrasound refers specifically to the volume rendering of ultrasound data.
Ultrasound may also have utility in diagnosing AC joint dislocations. [12] In infants <6 months of age with suspected developmental dysplasia of the hip (congenital hip dislocation), ultrasound is the imaging study of choice as the proximal femoral epiphysis has not significantly ossified at this age. [13] Cross-sectional imaging (CT or MRI)