Ch.2 Post-test: Spatial Localization Exam Questions With Correct Answers.

Ch.2 Post-test: Spatial Localization Exam Questions With Correct Answers. In a vertical field mag, which Axis corresponds to the longitudinal direction, if the patient is in head first, supine position? y x x-z z - answerY axis The magnetization of proton A makes one revolution of its processional motion every 0.030 microseconds. The magnetization of proton B makes one revolution of its recessional motion every 0.015 microseconds. Therefore, the frequency of the magnetization of proton A is ____ the frequency of proton B? twice one-quarter the same as 1/2 - answer1/2 In the standard pulse sequence described so far in this program, how many TR periods are required to completely phase encode a single slice? 1 TR period many TR periods as number of slices EXAM STUDY MATERIALS July 29, 2024 12:59 PM many TR periods as phase lines resulting large matrix many TR periods as frequency steps in the resulting image - answerAs many TR periods as phase lines in the resulting image matrix During a six-minute conventional scan, when is the data collected that is used to form the lower third of the image? During first 2 minutes of scan During middle 2 minutes of scan During last 2 minutes of scan Throughout the entire scan - answerThroughout the entire scan Using a traditional pulse sequence, which of the following is FALSE regarding a single echo? It contains the anatomical information from specific line of the resulting image It is decoded by the Fourier transform It is accumulated within a raw data file It represents the information acquired within the TR period of a single slice - answerIt contains the anatomical information from specific line of the resulting image Along what direction are motion artifacts always seen? perpendicular to direction of motion EXAM STUDY MATERIALS July 29, 2024 12:59 PM along freq direction of image in direction of motion along phase direction of image - answerAlong the phase direction of the image Along what direction are chemical shift artifacts always seen? Perpendicular to long axis of the body Along frequency direction of the ima