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Ortho Imaging 2
Orthopedics
| Question | Answer |
|---|---|
| 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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