Understanding MRI and fMRI

What is the primary purpose of an fMRI machine?

• To take pictures of the brain's structure

• To measure brain activity

• To scan for viruses

• To diagnose bone fractures

What is the first step in the MRI process demonstrated in the video?

• Turning off the magnetic field

• Placing the object in the center of the magnet

• Scanning for brain tumors

• Aligning the hydrogen atoms

How strong is the magnetic field of an MRI compared to Earth's magnetic field?

• 10 times stronger

• 100,000 times stronger

• 100 times stronger

• 1,000 times stronger

What happens to hydrogen atoms during an MRI scan?

• They align with the magnetic field

• They change color

• They are destroyed

• They emit light

What is the role of hydrogen atoms in MRI imaging?

• They are used to cool the machine

• They provide energy for the scan

• They help differentiate tissue types

• They create the magnetic field

What is a potential danger of bringing ferrous metals into an MRI room?

• They can cause the machine to overheat

• They can be pulled into the magnet

• They can emit harmful radiation

• They can cause the machine to malfunction

What precaution should be taken if a person has metal shards in their eye?

• They should avoid eating before the scan

• They should have an x-ray before the MRI

• They should remove all jewelry

• They should wear protective goggles

What is one advantage of fMRI over traditional x-rays or CT scans?

• It is faster

• It uses no ionizing radiation

• It is cheaper

• It provides color images

What can fMRI technology reveal about the brain?

• The brain's electrical activity

• Which parts are active during tasks

• The brain's temperature

• The brain's chemical composition

Why is the narrator not worried about the safety of MRIs?

• They are only used in emergencies

• They have been proven to be completely safe

• No studies have linked them to adverse health effects

• They are less powerful than x-rays