الفهرس 
Normal Anatomy and Techniques of MRI and UltrasoundOnly 14 pages are availabe for public view
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Abstract
Due to rapid technical improvements, US has become the “extended diagnostic finger” in the rheumatologist’s daily practice with high patient acceptability. Therefore, accurate assessment of joint inflammation such as synovitis and bone processes is extremely important and standardization is, therefore, essential (Ohrndorf et al., 2013).
Technological advances with high-field imaging, dedicated wrist and finger coils, and improved computational analysis have increased the applicability of wrist MR imaging.
MR provides more bone and soft tissue detail than nearly all other wrist imaging modalities. The main limitations of MRI are the high cost, long imaging time, increased motion artifact, and lower spatial resolution compared with CT and ultrasound. Patients may find the imaging position uncomfortable or claustrophobic or may be unable to undergo MRI owing to a pacemaker or incompatible vascular implants (Lee et al, 2014).
Magnetic resonance imaging is an excellent diagnostic method for demonstrating bone and soft tissue abnormalities resulting from different types of ankle impingement, providing useful data to confirm the diagnosis as well as to rule (Bassett et al., 1990; Watson, 2007).
We aimed in this study to compare between the ultrasound & MRI findings in non-traumatic pathology of peripheral joints.
The study included patients who are referred with clinically suspected peripheral joints pathology for MRI valuation. All the patients had been subjected to MRI followed by Ultrasound assessment and the results had been compared.
Full history taking and full clinical examination by referring clinician. Complete renal function including (serum creatinine level) was estimated. All patients had been subjected to MRI using dedicated peripheral extremity coil & then ultrasound examination using superficial linear probe.
Our results showed that:
There was a significant good agreement between US & MRI in detection of joint effusion and significant excellent agreement between US & MRI in detection of Talonavicular tenosynovitis, Tibialis posterior tenosynovitis, peroneal tendons tenosynovitis, Flexor digitorum tenosynovitis Flexor Hallucis longus tenosynovitis, bony calcaneal spur, planter fasciitis, Tendoachilis peritendinopathy, OA of 1st TMT joint, Tenosynovitis of 4th extensor compartment tendons (EDL & EIP tendons), OA of first CM joint, Flexor polices longus tenosynovitis, 1st MC PH joint effusion and Tenosynovitis of extensor polices longus Tendon. Two cases that positive for talar head subchondritis in MRI can not be detected by US with no agreement between US & MRI in detection of talar head subchondritis. Also, two cases that positive for talar head marrow contusion in MRI cannot be detected by US with no agreement between US & MRI in detection of talar head marrow contusion.
In conclusion, both ultrasound & MRI findings showed an excellent agreement and high accuracy in detection of non-traumatic pathology of peripheral joints. However two positive cases for talar head subchondritis in MRI could not be detected by US and two positive cases for talar head marrow contusion in MRI could not be detected by US.