In reverse Townes projection central X-ray passess through 1) Maxillary sinus 2) Occipital bone 3) Buperior border of petrous 4) Inferior border of petrous
RadiologyAnswer: 2
Which of the following statements is false 1) "Unsafe" dark room lights cause fogging of films 2) Alveolar resorption is easily recognized on X-ray 3) Decreasing focal skin distance increases radiation safety factor 4) None of the above
RadiologyAnswer: 3
Which of the following is not a form of ionising radiation 1) Alpha-particles 2) Beta-particles 3) X-rays 4) Radiowaves
RadiologyAnswer: 4
Which of the following imaging techniques cannot differentiate benign and malignant tumours of salivary gland 1) Scintigraphy 2) CT scan 3) MRI 4) Sialography
RadiologyAnswer: 1
Dead bone appears on a radiograph as 1) Radiolucent 2) Radiopaque 3) Cotton wool appearance 4) Salt and pepper appearance
RadiologyAnswer: 2
Base of skull can be viewed by 1) Towne"s projection 2) Submentovertex 3) PA view of skull 4) Both A and B
RadiologyAnswer: 4
The extraoral radiograph that best demonstrates the subcondylar portion of mandible is the (neck of the condyle) 1) AP mandible 2) Waters view 3) Towne"s view 4) Submental vertex
RadiologyAnswer: 3
An exposure of 2 R is recorded at point 8 cm. Keeping the same beam the exposure at 4 cm is 1) 4 R 2) 6 R 3) 8 R 4) 16 R
