Aquifer - Radiology exam 2023 with 100% correct answers
Window vs. Reconstruction on CT? correct answersReconstructions - processing of the raw CT data allows for better resolution of the structures [higher resolution and higher contrast] Reconstruction can be done in 3D (ortho) or in a linear way too (vascular) What is the total range of hounsfield units availabe? correct answers-1000 (air) to +1000 (metal) [so range is 2000] What does a typical computer display show for greyscale range? What can the human eye actually distinguish? correct answers256shades (that means each shade of grey covers ~8HU) The can only distinguish 17 shades of grey What is a good way to check diaphragm flattening? correct answersLook at the lateral film Diaphragm will be flat like you can set a ruler down on the edge What can a poor inspiration/hypoinflation appear like? correct answersconsolidation or PNA How to look at the lung fields? correct answersSweep or a zig zag down the lung field (both in PA and lateral views) look for focal, diffuse, BL asymmetrical, interstital/vasc markings, lucencies (cavity/bullae/PTX), compare upper and lower and L/R zones Middle lower zones
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