This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fundamentals in Radiology, Subject name: Radiology
"Time of flight" technique is employed in - 
Select and explain. 
A. Spiral CT, B. MR imaging, C. CT angiography, D. Digital radiography
B: MR imaging
Answer: B: MR imaging 
Explanation: Time of flight angiography (TOF) is an MRI technique to visualize flow within vessels, without the need to administer contrast