Question

Third-generation CT scanners use

• A. Translate--translate motion
• B. Translate--rotate motion
• C. Rotate--rotate motion
• D. Stationary detectors and source

Hint:

CT scanner generations: \[ \boxed{ \begin{aligned} 1^\text{st},2^\text{nd} &\rightarrow \text{Translate--rotate} 3^\text{rd} &\rightarrow \text{Rotate--rotate} 4^\text{th} &\rightarrow \text{Stationary detector ring} \end{aligned} } \]

Answer 1

The Correct Option is C

Step 1: Recall CT scanner generations. \[ \begin{aligned} \text{First generation} &\rightarrow \text{Translate--rotate}, \text{Second generation} &\rightarrow \text{Translate--rotate}, \text{Third generation} &\rightarrow \text{Rotate--rotate}, \text{Fourth generation} &\rightarrow \text{Rotating source with stationary detectors.} \end{aligned} \]

Step 2: Identify the third-generation motion. Hence, \[ \boxed{\text{Rotate--rotate motion}} \] is the correct answer. Therefore, \[ \boxed{(C)} \] is the correct answer.