Data Trace Editor – Technique: – protocols: fat suppressed T2 wt images and proton density weighted images – older protocol: T1 & T2 coronal oblique spin-echo sequences with use of 14 cm field of view and a four-millimeter slice thickness; – Discussion: – it is the most important view for identification of … Read more
– See: MRI of Spine – Discussion: – MRI is sensitive for detecting infection & is specific in differentiating infection from tumor; – infection: – T1 weighted images: – decreased signal intensity in vertebral bodies & disk w/ … Read more
– See: MRI of Spinal Osteomyelitis – Discussion: – may help identify associated abscesses, sequestra, and sinus tracts; – MRI may reveal specific changes in bone marrow; – in bone marrow, inflammatory exudate has decreased signal on T1 as compared to normal marrow; – infected marrow will have … Read more
– See: – MRI Spine: Discussion; – Role of CT in C-spine Injuries: – Discussion: – for visualizing soft tissue and neural elements, & unsuspected disc herniations in presence of cercial spine fractures; – disc herniation may indicate disruption of anterior or posterior longitudinal ligament; – MRI … Read more
– See: – MRI of Hip: – Johns Hopkins – MRI Evaluation of AVN – Discussion: – magnetic resonance imaging is probably the most accurate imaging modality for dx of AVN of femoral head; – MRI imaging is also used to outline the area of involvement; … Read more
– Discussion: – MRI findings in normal subjects (from Boden-SD) – note that there is a 29% prevalence of disc herniation in asymtomatic individuals; – patients less than 60 years of age: – 20 per … Read more
– Discussion: – it is not a neuroma but a perineural fibrosis and it was not first accurately described by Morton but by Durlacher, a chiropodist in 1845; both Thomas G. Morton (1876) and Thomas K. Morton (1892) mistook it for a painful affection of the fourth MTP articulation – it is a type of nerve compression … Read more
– Mosaicplasty: – refers to the technique of harvesting small circular (4-8 mm) autogenous grafts from the knee from non wt bearing regions of the knee, and transplanting the grafts in a mosaic pattern until the osteochondral defect is filled; – typically the grafts are harvested from the periphery of the supero-lateral trochlea, but often, the … Read more
– See: Growth Deformities of the Limbs: – Discussion: – straight-line graph based on a logarithmic scale of relative rates of limb growth along w/ expected discrepancy at maturity; – straight line graph also allows estimation of how epiphysiodesis will affect the long lower limb at different ages; – graph requires … Read more
– Discussion: – most common pattern of motor branch of median nerve is extraligamentous take off from main branch of median nerve (distal to TCL in 50% pts) – in 30% of pts motor branch exits proximal to TLC; – in 20% of pts motor branch exits distal to TLC; … Read more