Image Analysis Flashcards
If the obturator foramen of the affected AP hip is clearly demonstrated.
How would you correct the positioning of the patient?
Indicates that the patient is rotated away from the affected hip.
Correction : rotate the patient towards the affected hip
Martensen p. 352
On an AP hip the femoral neck is completely foreshortened, how would you correct this?
Indicates the patient’s feet were externally rotated
Ensure to internally rotate the feet internally (what is the appropriate degrees of rotation?)
Martensen p. 352
On an Axiolateral (InferoSuperior) Hip the greater trochanter is demonstrated posteriorly and the lesser trochanter is superimposed over the femoral shaft. Correction?
Patient’s affected leg was externally rotated
What should be seen in profile on an axiolateral hip?
Correction? Internally rotate the patient’s leg until the femoral epicondyles are aligned parallel with the imaging table and the foot is angled internally 15-20 degrees.
Martensen p. 361 Image 14
AP C-spine
The mandible is superimposed over a portion of the 3rd cervical vertebrae. the upper occlusion plane is positioned inferior to the base of occiput. Correction?
Raise the chin half the distance demonstrated between the base of the skull and the mandibular mentum.
Martensen p. 380
What should be visualized on an AP c-spine?
Odontoid
Dens is superimposed over the posterior occiput. Upper incisors demonstrated 3.75 cm superior to base of skull. Correction?
Tuck the chin toward the chest
What should be clearly visualized on odontoid (open mouth)
Martensen p. 384
Lateral T-spine
Posterior surfaces of the vertebral bodies are demonstrated without superimposition and the posterior ribs are superimposed. Correction?
The elevated side of the thorax was rotated anteriorly therefore rotate patient posteriorly.
Martensen p. 411 Image 38
What should be seen on a lateral t-spine?
Lateral T-spine
T8-T12 intervertebral disk spaces are obscured and the vertebral bodies are distorted. Correction?
The vertebral column was not aligned parallel with the imaging table. Use a sponge to straighten the spine.
Martensen p. 412 Image 39
AP lumbar spine
T12-L3 intervertebral disk spaces are closed, lumbar bodies are distorted, ischial spines are demonstrated without pelvic brim superimposition
See p. 417 Martensen
TRUE OR FALSE
Intervertebral foramen are seen on an lateral C-spines, T-spines and L-spines.
Refer to Merrill’s 1 C,T,L spines
TRUE OR FALSE
Zygapophyseal joints can be seen on lateral C-spine, t-spine and L-spine.
Refer to Merrill’s 1 C,T, L spines
Which intervertebral foramina would be seen on C spine oblique projection (LPO)?
Refer to Merrill’s 1 p. 405
Which intervertebral foramina would be seen on C-spine oblique projection (RPO)
Refer to Merrill’s 1 p. 405
What is the recommended degree of rotation for the Axial oblique projections of the C-spine?
Refer to Merrill’s 1 p. 404
TRUE OR FALSE
Turning the chin to the side causes slight rotation of the superior vertebrae and should therefore be avoided.
TRUE
p. 404 Merrill’s 1
What else is clearly visualized (other than the intervertebral foramina) in an axial oblique projection of the C-spine?
Pedicles farthest away from IR (AP)
Pedicles closest to IR (PA)
p. 405 Merrill’s 1
