A Number of Techniques Are Used for Diagnostic Imaging of Internal

Multiple Choice

A number of techniques are used for diagnostic imaging of internal body organs. Which of these do not involve ionizing radiation and therefore do not pose a risk for producing cancer?
I. CT scan (X-ray computed tomography)
II. MRI scan (radio-wave magnetic resonance imaging)
III. US scan (ultrasound)
IV. Nuclear heart scan (radioactive tracer)
V.EKG (electrocardiograph)

A) I and IV
B) II and III
C) III only
D) III and V
E) II, III, and V