Magnetic Resonance Imaging (MRI) Practice Test

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for your MRI Test with flashcards and diverse question types. Each question includes hints and explanations for better understanding. Boost your confidence and ace your exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What would be the scan time for a FSE sequence with a 25 cm FOV, 224 x 320 matrix, TR 2500, TE 100, and 4 NEX?

2 minutes and 45 seconds
3 minutes and 7 seconds
4 minutes and 15 seconds
5 minutes and 30 seconds

The correct answer is: 3 minutes and 7 seconds

To calculate the scan time for a Fast Spin Echo (FSE) sequence, you need to consider the parameters such as the field of view (FOV), matrix size, repetition time (TR), echo time (TE), and the number of excitations (NEX). The formula for calculating scan time in an FSE sequence is: Scan Time = TR × (number of slices) × (number of NEX) / (number of acquisitions) In this scenario, we have the TR of 2500 ms (2.5 seconds) and we also have NEX = 4. However, it's important to note that in many FSE sequences, the number of slices might not be explicitly given unless specified; if we assume a single slice acquisition for the calculation, we can go with that as a typical case. Using the values provided: 1. TR = 2500 ms = 2.5 seconds 2. NEX = 4 Therefore, the calculation would proceed as follows if we take a single slice into account: Scan Time = TR × NEX = 2.5 seconds × 4 = 10 seconds If the sequence involves multiple slices, you would multiply by the number of slices.