Imaging Flashcards
NEURO
Stroke (Ischemic)
- MRI (diffusion-weighted = highest sensitivity for early ischemia) -> ?
- Non-Contrast CT -> ?
- Bright (3 - 30 mins)
- ABSENCE of bright areas + dark abnormality (12 - 24 hrs)
- ** Absence of bright areas very accurate to exclude hemorrhage.***
NEURO
Epidural Hematoma
CT -> ?
Lens / “biconvex disk”-shaped lesion. Not crossing suture lines.
NEURO
Subdural Hematoma
CT -> ?
Crescent-shaped lesion. Crosses suture lines. Midline shift.
NEURO
Pilocytic Astrocytoma
“Cystic lesion” with “mural nodule”
NEURO, MICRO
Cryptococcus neoformans infection
“Soap bubble” lesions in brain
GI
Colorectal Cancer (CRC)
Ab XR -> ?
“Apple core” lesion
GI
L CRC
“Napkin ring” lesion
GI
Ulcerative Colitis
Barium Enema XR -> ?
“Lead pipe” appearance of colon
GI
Crohn Disease
Barium XR -> ?
“String Sign”
GI
Duodenal Atresia / Stenosis / Webs,
Malrotation of Gut,
Annular Pancreas
“Double-Bubble Sign”
2 air-filled structures in UPPER abdomen with little or no air below
GI
1ry Sclerosing Cholangitis
ERCP -> (2)?
ERCP: Intra- + Extrahepatic bile ducts
- Concentric “onion skin” bile duct fibrosis
- Alternating strictures / dilations = “beading” pattern
(uninvolved regions dilated)
GI
Chronic Pancreatitis
Imaging with Contrast -> (2)?
- “Chain of lakes” pattern (due to DILATION of pancreatic ducts)
- Calcification
GI
Gallstone Ileus
“AIR in biliary tree”
CV
Tetralogy of Fallot + RVH
XR -> ?
“Boot-shaped heart”
CV
Transposition of Great Arteries
ECHO -> ?
Aorta lying ANT. to Pulm Art.
CV
Dilated / Congestive Cardiomyopathy
- CXR -> ?
- U/S -> ?
- “Balloon” appearance on CXR
- Dilated heart on U/S
CV
Acute Decompensated Heart Failure (ADHF)
CXR -> (5)?
CXR:
- Alveolar edema (perihilar)
- Cephalization of pulm vessels
- Pleural Effusions
- Kerley B lines
- Cardiomegaly
HEME
Sickle Cell Anemia + B-Thalassemia
Skull XR -> ?
“Hair on end” / “Crew-Cut” appearance
due to marrow expansion due to↑erythropoiesis
HEME
Multiple Myeloma
XR -> ?
“Lytic” / “Hole-punched” bone lesions
RENAL
Medullary Cystic Sx
U/S -> ?
“Shrunken kidneys”
RESP
Pleural Effusion
CXR -> (CLUE)?
CXR: BLUNTING of costophrenic angles
RESP
Obstructive Pulmonary Dz
CXR -> (2)?
CXR:
- Hyperinflated lungs
- Flattened diaphragm
RESP
Kerley B Lines
Def’n, Significance?
CXR: Short horizontal lines perpendicular to pleural space.
EDEMA of interlobular septa.
RESP
Interstitial Pulmonary Fibrosis
CXR / CT -> (2)?
CXR:
- “Honeycomb lung”
- Diffuse reticular opacities
RESP
Epiglottitis (H influenzae)
XR (Lateral) -> ?
“Thumbprint sign”
thickening of the epiglottis, as seen on Lat Neck XR
RESP
ARDS
CXR -> ?
CXR: Bilat airspace opacification
RESP
NRDS
“Ground glass” appearance of Lung (due to diffuse granularity)
RESP
1ry Pulmonary Hypertension
CXR -> (ENLARGEMENT of 2)?
CXR: ENLARGEMENT of
- Pulm art
- R.V
RESP
Pneumothorax
CXR -> ?
CXR: White visceral pleural line. Pulm vessels not visible beyond line.
RESP
Tension Pneumothorax
CXR -> (CLUE)?
CXR: Mediastinum shifted AWAY from affected side.
RESP
Lung Cancer
“Coin lesions” on CXR
MSK
Osteoporosis
“Bone-in-Bone” appearance on XR
IMMUNO
DiGeorge Sx (Thymic aplasia) + SCID
- CXR -> ?
- CXR -> Absent Thymic shadow
MSK
Ankylosis
“Bamboo spine”
vert fusion
MSK
Psoriatic Arthritis
“Pencil in cup” deformity on XR
MSK
Osteosarcoma, Ewing Sarcoma, Pyogenic Osteomyelitis
“Codman Triangle” / “Sunburst pattern” on XR.
Periosteum raised from bone creating a triangular area
MSK
Osteoclastoma (Giant Cell tumor)
“Double-Bubble” / “Soap Bubble” lesion in bone
MSK
Ewing’s Sarcoma
“Onion skin” appearance of bone
MSK
Chondrosarcoma
“Expansile glistening mass” w/in medullary cavity
