Question

21. Ionizing radiation is used widely in the medical field to allow us to “see” inside the body. Which of the following statements are correct?

Select one:

a. X-ray imaging is used commonly to image soft tissue injuries.

b. X-ray imaging depends on the amount of “reflectance” of different types of tissue to create images.

c. Single Photon Emission Computed Tomography has poor spatial resolution but can have good contrast when used with a radionuclide.

d. Positron Emission Tomography does not require the use of radioactive substances.

Answer 1

Option-A: X-Ray is used to image fractured bones, but for soft tissue MRI is better than X-ray. So this option is wrong.

Option-B: MRI not X-ray imaging depends on the amount of “reflectance” of different types of tissue to create images. So this option is also wrong.

Option-C: Single Photon Emission Computed Tomography has poor spatial resolution but can have good contrast when used with a radionuclide. This is the correct answer.

Option-D:  Positron Emission Tomography does not require the use of radioactive substances. This is wrong option because PET uses radioactive substances.