Imaging, Public Health Flashcards
Significance of gas bubbles on XR
Signs of necrotizing faciitis
Imaging modality best for posterior spine
CT (poorly visualized on MRI)
Imaging modality best for the cervico-thoracic junction
CT
Imaging modality best for occult, stress, or scaphoid fractures
MRI (CT is good too, but not best)
Imaging modality ALWAYS used in spinal trauma
CT (allows to visualize bony elements not seen well on MRI)
Also get MRI if cord involvement is suspected
Imaging modality used in evaluation of the growth plates
CT or XR
Imaging modality best for visulizing the marrow space
MRI (but poor for cortical bone)
Imaging modality best for osteoporosis
MRI
Differences in the T2 imaging MRI
T2 weighted: Fat is bright, fluid is bright, best for identification of pathology, but not tissue involved
T2 fat saturated: Fat is DARK and fluid is bright (fat is bright in T1 and T2 weighted)
MRI procedure infinfection or tumor is suspected
obtain MRI with and without contrast to evaluate vascularity and invasion
Imaging modality most commonly used in ligament or tendon tears
MRI
Can also get US if damage is superficial
MRI procedure for a labral tear
MRI with injection of gadolinium into joint
Situations where MRI must ALWAYS be used
Spinal trauma
Prior to biopsy of any soft tissue mass or bone lesion that could be malignant (aspiration will disrupt borders)
Most common MSK complaint in US
low back pain (followed by joint pain or arthritis)
Leading cause of short term work absence
Respiratory
