MIC CT Registry Review - Module 2 Image Formation Questions and Answers 100% Pass

MIC CT Registry Review - Module 2 Image Formation Questions and Answers 100% Pass Interpolation - Correct Answer ️️ -The Mathematical calculation that divides the helical data into raw data files into individual planar slices Types of methods of image reconstruction - Correct Answer ️️ --Filtered Back projection reconstruction -Iterative reconstruction -Cone beam reconstruction Filtered back projection - Correct Answer ️️ -The reconstruction method that raw data must go through inorder to form a CT image Back projection - Correct Answer ️️ -A technique which adds together the attenuation information from all the projections. And used on single-row detectors and multi-row detectors that collects no more than 4 slices on one rotation Convolution - Correct Answer ️️ -The process of applying a filter to the raw data during image reconstruction What is the purpose of the filters during image reconstruction? - Correct Answer ️️ -To enhance the characteristics of the image before back projection is performed Reconstruction filter or kernel - Correct Answer ️️ -The filter applied to raw data during image reconstruction Types of reconstruction filters? - Correct Answer ️️ -Sharp and smooth What does the sharp reconstruction filter do to the image? - Correct Answer ️️ - Improves the definition of the edges of structures but does not minimize grainy or speckled appearance of the image Sharp filters are often used to visualize what types of regions or studies? - Correct Answer ️️ -High contrast regions or such as musculoskeletal studies What does the smooth reconstruction filter do to the image? - Correct Answer ️️ - Minimizes the grainy appearance of noise in the image so the contrast between tissues can be better distinguished- does not improve edge definition Smooth filters are often used to visualize what types of regions or studies? - Correct Answer ️️ -Low contrast regions or such as abdomen or brain studies What is iterative reconstruction? - Correct Answer ️️ -Complex cycle of correction calculations which may be applied during the image reconstruction process to reduce image noise, and which allows a greatly reduced dose to be used without compromising image quality The process of iterative reconstruction? - Correct Answer ️️ -Raw data or image pixels are compared to one another to determine slight data inconsistencies (noise, graininess) it gets corrected and the process is repeated many times and each time less graininess or noise is in the image, but most importantly it allows less dose to be used while maintaining optimal quality