Medical Physics Practice
10 problems · instant feedback · full explanations
Hospitals run on physics: X-rays are photons, MRI is nuclear magnetism, ultrasound is sound echoes. Dose and safety are quantitative.
Q1.
A chest X-ray images the body using:
Multiple choice · Easy
Q2.
Which technologies does MRI imaging use to see inside the body?
Multiple choice · Medium
Q3.
Ultrasound imaging uses:
Multiple choice · Easy
Q4.
An ultrasound echo returns after 0.1 ms. How deep is the reflector? (v = 1540 m/s in tissue. Answer in m.)
Numerical answer (m) · Medium
Q5.
X-ray shielding is made of:
Multiple choice · Medium
Q6.
What does a PET scan detect to locate metabolically active tissues?
Multiple choice · Hard
Q7.
X-rays are ionizing radiation and their use must be justified by medical benefit.
True / False · Easy
Q8.
The main MRI safety concern is ionizing radiation.
True / False · Medium
Q9.
X-rays pass through 3 half-value layers of shielding. What fraction gets through? (decimal)
Numerical answer · Hard
Q10.
A tumor receives 2 Gy per radiotherapy session for 25 sessions. What is the total dose? (Gy)
Numerical answer (Gy) · Hard