Which of the following are most sensitive to X-ray? 1) Tooth buds and salivary glands 2) Nerve and muscle tissue 3) Hair and nails 4) Cartilage
RadiologyAnswer: 1
Overlapping of proximal structures in a periodical or bitewing radiograph is due to 1) Incorrect horizontal positioning of cone 2) Incorrect vertical positioning of cone 3) Incorrect vertical positioning 4) None of the above
RadiologyAnswer: 1
Radiation injury to the haemopoietic system of the bone marrow occurs when the whole body exposure ranges between 1) 50-100 rads 2) 200-1000 rads 3) 1000-5000 rads 4) 10,000 rads to more
RadiologyAnswer: 2
The target of the X-ray tube is angulated to produce all the following effects except 1) To decrease the effective focal spot 2) To increase the image sharpness 3) to energize the photons 4) To dissipate heat
RadiologyAnswer: 3
Radiodensity can be increased by 1) Decreasing mA 2) Decreasing kVp 3) Decreasing target-film distance 4) Increasing target-film distance
RadiologyAnswer: 3
Apical root fracture is visible in 1. Intraoral periapical X-ray 2. Bitewing X-ray 3. Occlusal X-ray 4. OPG
RadiologyAnswer: 1
X-rays cause radiation damage primarily by their property of 1. Penetration 2. Radioactivity 3. Electromagnetic induction 4. Ionisation
RadiologyAnswer: 4
The minimum distance and angle between the X-ray source and operator should be at least 1) 6 feet, 45 degree 2) 6 feet, 135 degree 3) 9 feet, 90 degree 4) 9 feet, 120 degree
