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54 Cards in this Set
- Front
- Back
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How many views do you need with a plain film?
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more than one!
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What is a displaced fracture?
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loss of contact between fracture fragments
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what is a dislocated fracture?
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loss of contact between joint surfaces
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What is a Bartons fracture?
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comminuted (many pieces), intraarticular* dorsally angulated distal radial fracture (Dorsal is key- different than a colles)
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What is a boxers fracture?
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distal 5th metacarpal fracture
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What is the father of radiology?
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wilhelm conrad roentgen
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what invited angiography/fluroscopy?
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walter B cannon
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What is the order of radiation exposure form the examples given?
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CT> upper GI> CXR > MRI (or ultrasound)
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what are the H units for water?
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0
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What are the H units for fat?
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-50
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what are the H units for air?
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-1000
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what are the H units for tissue?
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+40
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what are the H units for calcium?
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+100
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what are the H units for bones?
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+1000
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What is CT best used for imaging?
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cancer, trauma, vascular pathology, abdominal symptoms
fast and cheap |
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who should not really get CT's?
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the young, pregnant- high RADs dose
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What is a CXR silhouette sign?
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loss of the expect interface normally created by to surfaces of different density
no boundary seen between structures of similar density |
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What is the correct position for a CXR?
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inspiratory effort to 9-10 posterior ribs
medial clavicular head equidistant to spinous process |
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What are the patterns of disease on a chest radiograph ?
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air space opacity
intersitial opacity nodules/masses |
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What are some of the airspace opacity diseases patterns?
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air bronchogram (air filled bronchus surrounded by airless lung)
confluent opacity extending to pleural surfaces |
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what are the hallmarks of interstitial opacity?
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well defined nodules
interlobular septal thickening fibrosis |
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what causes interstitial opacity?
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idiopathic
infection edema hemorrhage sarcoid tumors |
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What is a lung cyst?
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abnormal space, not containing lung but has air/fluid.
wall thicker than 1mm |
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what is a lung cavity?
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abnormal space, filled with air/fluid- causes by necrosis and has a wall thicker than 1mm that is comprised of inflammatory or neoplastic elements
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what is the CXR pattern of an effusion?
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angle blunting to massive (?)
mobility of the fluid |
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What CT set up gives the best spatial resolution?
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wide beam with narrow detectors
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What type of resolution is CT best at?
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spatial resolution
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What is type of resolution is MR best at?
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contrast resolution
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Which has fever contrast allergies, CT or MR?
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MRI
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What plane does CT only image in (initially)
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axial only- the rest are created by remapping the data
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How many lobes does the right lung have?
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3, upper middle lower
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What does the right oblique fissure separate?
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upper and lower lobes
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what does the right minor fissure separate?
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upper and middle lobes
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In the lungs, what vessels course with the bronchi?
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arteries
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where does the azygos vein course?
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ascends on the right side of the body, arches into the right tracheobronchial angle, and empties into the SVC
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where does the hemiazygous vein course?
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up the left side of the body until about t8-t9, which its crosses over to the right to join the azygous vein
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From the abdominal lecture, what is the decreasing list of radiation of different diagnostic procedures?
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CT abdomen, barium enema, upper GI, IVP, CT head, Lumbar spine, skull c ray, CXR
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what is adynamic ileus?
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gas in dilated small and large bowel to rectum
happens post op or with pain meds |
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What is the best test for renal colic?
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non-contrast abdomen and pelvic CT
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What is the best test to look for pneumoperitoneum?
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abdomen and pelvic CT
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What type of radiograph is NOT used for penumoperitoneum?
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supine abdominal radiograph
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What is the single best test for Cholecystitis?
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ultrasound
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What is the best test for pancreas imaging?
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CT or MRI are both better than ultrasound
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What is the best test for appendicitis?
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CT
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what is a good test for appendicitis in children?
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ultrasound- CT is still the best
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What is the best test for cholelithiasis?
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ultrasound
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What does a post traumatic subarachnoid hemorrhage look like?
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blood in the sucli and fissures
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What is the shape of a subdural hematoma?
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crescent shaped, hyperdense
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What causes subdural hematoomas?
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tearing of bridging veins
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What is the CT finding for a subacute subdural hematoma?
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shift of midline structures without obvious mass- as the hemorrhage is old and becomes isodense to normal gray matter
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What is the shape of an epidrual hematoma?
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hyperdense biconvex mass
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Where are the most common areas of damage in a diffuse axonal injury?
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subcortical white matter
posterior limb of internal capsule corpus callosum dosolateral midbrain |
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what is the most common cause of a hemorrhagic stroke?
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hypertensive hemorrhage
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what is the best way to image a subarachnoid hemorrhage?
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CT
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