2nd Year Physics Chapter 11 Test25. Medical Imaging

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. The radiation emitted due to sudden deceleration of electrons is called:
   1. Bremsstrahlung
   2. Larmor radiation
   3. Fluorescence
   4. Synchrotron
2. Normal X-ray films are limited because:
   1. They are 3-D
   2. They only give shadow-like images
   3. They show color
   4. They cannot detect fractures
3. Which of the following is a piezoelectric material?
   1. Quartz
   2. Lead zirconate titanate (PZT)
   3. Lithium niobate (LiNbO₃)
   4. All of these
4. Medical imaging using ultrasound is known as:
   1. Radiography
   2. Sonography
   3. MRI
   4. CT scan
5. CT scan images of the brain are obtained by:
   1. Combining 2-D images from different angles
   2. Using ultrasound
   3. Simple X-ray film
   4. Using gamma rays
6. The voltage between cathode and anode in an X-ray tube is approximately:
   1. 500 V
   2. 5000 V
   3. 50,000 V
   4. 5 V
7. The cathode in an X-ray tube is made of:
   1. Copper rod
   2. Filament
   3. Tungsten target
   4. Platinum sheet
8. Ultrasound can be used in neurosurgery because:
   1. It produces X-rays
   2. It focuses intense waves without disturbing nearby tissues
   3. It produces gamma rays
   4. It requires radioactive substances
9. Sounds above 20,000 Hz are called:
   1. Audible sound
   2. Ultrasound
   3. Infrasound
   4. Doppler sound
10. Which spectrum do continuous X-rays form?
    1. Sharp line spectrum
    2. Continuous spectrum
    3. UV spectrum
    4. IR spectrum