USAHS Neuro Test 1 Unit 3 exam 2023/2024 with 100% correct answers

What are the 3 most common imaging modalities? - correct answer CT, MRI, and neruoangiography. Most CT and MRI are? - correct answer 2D slices What are the 3 imaging planes? - correct answer Horizontal (axial), coronal, Sagittal MRI scans are? - correct answer True horizontal slices What was CT scan developed from? - correct answer Conventional Xray What does CT measure? - correct answer Density of tissues What are the differences b/w CT and conventional Xray? - correct answer - Slices are obtained simultaneously - Multiple xray beams pass through pt from different angles. - Densities are displayed as cross section image of head. How does bone/dense structures show up on conventional X-rays? - correct answer White = hyper dense How does air/less dense structures show up on conventional X-rays? - correct answer Black = hypodense How does immediate dense structures show up on conventional X-rays? - correct answer Gray = isodense (CSF) Density is expressed in what? - correct answer Hounsfield Units HU = 0? - correct answer Water HU = -1000? - correct answer Air An acute abnormal finding with a CT would be? - correct answer Hyperdense b/c of blood coagulation. An acute abnormal finding one week post with a CT would be? - correct answer Isodense An acute abnormal finding 2-3 weeks post with a CT would be? - correct answer Hypodense Epidural hematoma - correct answer B/w dura mater and skull (lens/football shape) Acute Subdural H