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Ortho Imaging 2

Orthopedics

QuestionAnswer
Spine Films/ Frontal: Vert body: Dec head height: in = Burst fx
Spine Films/ Frontal: Vert body: Open beak, or inc distance btw 2 beaks: in = Chance fx or spinous process fx
Spine Films: Oblique: each vert = Scotty Dog: look for: a collar
Spine Films: Oblique: Scotty Dog: front & hind legs = inf intervertebral articular processes
Spine Films: Oblique: Scotty Dog: Ears & tail = superior intervertebral articular processes
Spine Films: Oblique: Scotty Dog: Dog body = the lamina
Spine Films: Oblique: Scotty Dog: dogs eye = a pedicle
Spine Films: Oblique: Scotty Dog: nose = a transverse process
Spine Films: Oblique: Scotty Dog: Neck = the pars interarticularis
Spine Films: Oblique: Scotty Dog: If the tail is to your right, you are looking at: right lamina (& vice versa for left)
Spine Film: Lateral View: Vert alignment: displacement seen in: fx & listhesis
Spine Film: Lateral View: decreased intervert disc space in: fx, DDD, & HNP
Spine Film: Lateral View: Cf ant & post vert body cortex for: changes in ht cf to the others (Burst or wedge fx)
Spine Film: Lateral View: fx lines in spinous processes = black (lucent) fx lines
Spine films: stable fxs = Wedge fx; spinous process fx
Spine films: unstable fxs = Burst fx; Chance fx
Chance fx: Unstable: best seen on what film? lateral
Spinous Process fx: Stable: lateral view shows: Lucency thru spinous process
Pelvic Films: Pelvic ring fx is commonly: disrupted in 2 places
Pelvic Films: AP view: Inspect: inner & outer main ring cortices; 2 small obturator rings; acetabulum for step off; SI joint spaces s/b equal; symph pubis should align, < 5mm joint space
Pelvic Films: CT if: fx identified or suspected
Hip Films: Order: AP pelvis w/ both hip joints; lateral of affected hip
Hip Films: Femoral Neck Smooth cortex w/ no buckle, step or ridge; Normal trabecular pattern; No transverse sclerotic lines
Hip Films: Intertrochanteric Region Cf to other hip; no lucency across the bone; no cortical defect
Hip Osteoarthritis: X-ray Decreased Joint space; Sclerosis; Osteophytes
Legg-Calve-Perthes Dz: X-ray shows: Mottled femoral head
Transient Hip Synovitis: X-ray shows: Capsular swelling
OA: xray findings asymmetric narrowing; loss of joint space; subchondral sclerosis & cysts; marginal osteophytes
OA: early chondral erosions can be visualized on: on arthroscopy (not visible on xray)
Prosthetic joint infection: xray usually shows: increased lucency around prosthesis
RA Imaging: must: ID changes early (avoid irreversible joint damage); sig amt genl skeletal bone lost early in dz
RA Imaging: early findings: soft tissue swelling, peri-articular osteopenia, marginal erosions
RA Imaging: late findings: diffuse osteopenia, joint space narrowing, deformities
RA: Plain films show joint damage after: 2 years of dz duration in 70% of cases
Pencil-in-cup deformity of proximal phalanx on xray psoriatic arthritis
Le Fort I: Floating palate, fx maxillary sinus
Le Fort II: Pyramidal fx, medial orbital and lateral maxilla
Le Fort III: Craniofacial disjunction, horizontal orbits
Spine x-ray: 5 lines prevertebral ST: s/b thin ; Ant & post vert lines: s/b aligned vertly; Spinolaminar line: join spinous process & lamina: sd be aligned vert; check facet joints
Spondylolisthesis: look also for: facet fx
Plain Films: Consider: Consider joint above & below injury
CT scan: Defines bony anatomy
Nuclear medicine studies: Help define tumors, etc
EMG: Evaluates denervation of muscle units
NCS: Evaluate conduction velocities
Created by: Abarnard
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