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Quiz about A Window into the Human Body Medical Imaging

A Window into the Human Body - Medical Imaging Quiz

It is difficult to overstate the importance of imaging techniques in modern medicine. I hope this quiz will be both an educational and entertaining affair on the basics of the most common techniques.

A multiple-choice quiz by Scrambledegg90. Estimated time: 4 mins.

Author
Scrambledegg90

Time
4 mins

Type
Multiple Choice

Quiz #
317,468

Updated
Dec 03 21

# Qns
10

Difficulty
Average

Avg Score
8 / 10

Plays
3922

Awards
Top 5% quiz!

Last 3 plays: MrNobody97 (10/10), Guest 75 (9/10), J_Town (10/10).

One at a Time - Single Page - Timed Game

Question 1 of 10

1. People say that hospital food and drink is pretty bad, but this one is probably worse than the rest! Why may a patient drink a "barium meal"? Hint

To allow their stomach and intestines to be X-rayed.

To protect their stomach from harmful X-rays.

To quench their thirst.

To stop the contents of their stomach blurring the X-rays.

NEXT>

Question 2 of 10

2. True or false: Bones appear white on X-ray images because they reflect lots of X-rays. Air appears black on X-ray images because it absorbs lots of X-rays.

True

False

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Question 3 of 10

3. Which rather cuddly sounding scan uses a rotating X-ray tube to take images of "slices" of a patient? Hint

DOG scan

CAT scan

BEAR scan

HAMSTER scan

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Question 4 of 10

4. Why is ultrasound, as opposed to a different imaging technique, used to see the foetus in the womb? Hint

Ultrasound helps the baby develop.

A foetus cannot hear normal sound.

It poses very little risk to foetus, mother or doctor.

Any medical professional can do it.

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Question 5 of 10

5. Which of these is the name of a scan that involves the injection of radioactive isotopes? Hint

PIN scan

MAN scan

PET scan

HAT scan

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Question 6 of 10

6. Doppler ultrasonography uses the Doppler effect to check the direction of bloodflow, ensuring that the valves in the heart are working properly. What is the Doppler effect? Hint

The change in frequency of a wave when the source of the wave and the observer are moving relative to each other.

The spreading out of waves when they hit a gap.

The change in speed of a wave when it passes through different materials.

The bending of waves when they enter a different medium.

NEXT>

Question 7 of 10

7. X-rays were the first non-invasive imaging technique to be discovered and are still extremely important. What is another name for X-rays? Hint

Harvey Radiation

Jenner Radiation

R�ntgen Radiation

Xerosis Radiation

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Question 8 of 10

8. What is the name of a doctor who specialises in interpreting medical imaging? Hint

Radiologist

Neurologist

Cardiologist

Imageologist

9. In urography, a contrast substance is injected intravenously. The body decides to filter this out of the blood. Where does this contrast go, allowing these usually un-X-rayable organs to be X-rayed? Hint

liver and pancreas

kidneys and bladder

heart and lungs

small and large intestine

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Question 10 of 10

10. The risks of which imaging machine can be summed up by the couplet "No metal near this machine. It will wipe your credit cards clean"? Hint

X-Ray machine

CT scanner

PET scanner

MRI Scanner

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Quiz Answer Key and Fun Facts

1. People say that hospital food and drink is pretty bad, but this one is probably worse than the rest! Why may a patient drink a "barium meal"?

Answer: To allow their stomach and intestines to be X-rayed.

Lots of organs cannot be seen by X-rays because they don't absorb them. Barium sulphate absorbs lots of X-rays, allowing doctors to see any abnormalities in the stomach or intestines.

2. True or false: Bones appear white on X-ray images because they reflect lots of X-rays. Air appears black on X-ray images because it absorbs lots of X-rays.

Answer: False

Although high intensity is normally shown by white and low intensity by black, what you usually see when you see an "X-ray image" is the negative of the radiograph. Like the negative of a photograph, the colours are inverted!

3. Which rather cuddly sounding scan uses a rotating X-ray tube to take images of "slices" of a patient?

Answer: CAT scan

CAT scan stands for Computer Assisted Tomography. Using computers, many CAT scan images can be used to build up an image of hard, bony structures. The other 3 choices are, of course, made up!

4. Why is ultrasound, as opposed to a different imaging technique, used to see the foetus in the womb?

Answer: It poses very little risk to foetus, mother or doctor.

Ultrasonography uses VERY high frequency sound waves, which the human ear cannot detect. The sound waves reflect off tissues. A computer then measures the time it took for the wave to return and any changes to direction, wavelength or frequency. From this the density of the tissue and its distance from the emitter can be worked out, allowing a digital image to be built up.

5. Which of these is the name of a scan that involves the injection of radioactive isotopes?

Answer: PET scan

Don't worry - it's much safer than it sounds! The dose of radiation is very small. PET scan stands for Positron Emission Tomography. The radioactive isotopes are used to "signpost" certain molecules, which are injected into the body. Doctors can then 'see' where these molecules go in the body because they emit positrons.

6. Doppler ultrasonography uses the Doppler effect to check the direction of bloodflow, ensuring that the valves in the heart are working properly. What is the Doppler effect?

Answer: The change in frequency of a wave when the source of the wave and the observer are moving relative to each other.

You can observe the Doppler effect in real life. When an emergency vehicle is travelling towards you then its siren sounds higher because the sound waves are squashed together. When it travels away from you its siren sounds lower because the waves are stretched out. This is the same with F1 racing cars!

7. X-rays were the first non-invasive imaging technique to be discovered and are still extremely important. What is another name for X-rays?

Answer: R�ntgen Radiation

X-rays were discovered by Wilhelm Conrad R�ntgen in 1895. An X-ray is like a shadow. The emitter is above the patient and the receptor is below. The black bits are where X-rays have gone through and the white bits are where they haven't. (Remember that most images you see taken with X-rays are negatives!)

8. What is the name of a doctor who specialises in interpreting medical imaging?

Answer: Radiologist

Cardiologists are specialists in the heart and blood vessels. Neurologists are specialists in the brain and nerves. Imageologists are not medical practitioners.

Answer: kidneys and bladder

I am not entirely sure that un-X-rayable is a word... This clever technique can be used to help diagnose kidney stones, various cancers and look for abnormalities in the kidneys, bladder and ureters.

10. The risks of which imaging machine can be summed up by the couplet "No metal near this machine. It will wipe your credit cards clean"?

Answer: MRI Scanner

MRI stands for (nuclear) Magnetic Resonance Imaging. It has a very, very strong electromagnet in it (which aligns hydrogen nuclei in water and fats) so it is important that people with pacemakers or metal plates in their heads don't even go near it when it's on for obvious reasons!

Source: Author Scrambledegg90

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