Medical Imaging Technologies Quiz

A medical technique that uses a strong magnetic field and radio frequency electromagnetic waves to investigate the human body. Hydrogen atoms in disease cells differ from normal body cells. Since bodies are mostly water, protons in hydrogen atoms are used in the process. The valence electron is induced to lose energy and the protons with their north and south magnetic poles, align themselves along the magnetic field.

• MRI

• X-Rays

The protons in tumors and other diseased tissues return from their lower-energy state at a different rate than in normal healthy tissue. The detecting medical device provides a series of pictures that doctors can read and observe to identify cancer and other diseases.

• MRI

• X-Rays

This technique consists of high frequency, high energy electromagnetic radiation that reveals bones and other tissues with different densities than the surrounding flesh.

• MRI

• X-Rays

Different tissue densities absorb different amounts of electromagnetic radiation that pass through the less-dense flesh will expose film or a detector and produce dark regions on the film. The unexposed, light-colored portions of the film indicate regions where electromagnetic radiation was absorbed. The pictures produced can indicate broken or fractured bones or diseased tissue in the lungs in cases of pneumonia.

• MRI

• X-Rays

Electromagnetic radiation such as x-rays or gamma rays, is beamed at the body to kill the genetic material in cancer cells so they cannot reproduce.

• X-Rays

• Radiation Therapy

A device used to STABILIZE the patient's head in a plane and at right angles to central ray

• cone

• cephalostat

What is the primary reason for using a superconducting magnet in an MRI machine?

• To reduce the noise level

• To increase the magnetic field strength

What safety concern is primarily associated with MRI?

• Exposure to ionizing radiation

• Risk of allergic reaction to contrast material

• Both

What is the role of the radio frequency (RF) receiver in an MRI machine?

• To detect the signals emitted by the body's nuclei

• To transmit radiofrequency pulses

What is the basic principle behind Magnetic Resonance Imaging (MRI)?

• Magnetic fields and radio waves

• Thermal imaging