21 - PGI chandigarh December 2007 Radiology Mcqs

1q: Most common cancer due to radiation ?

a. leukemia
b. bronchogenic carcinoma
c. Thyroid carcinoma
d. breast cancer
e. bone tumor

answer a . leukemia . Thyroid and bone marrow are most sensitive to radiation . kidney, urinary bladder and ovary are least sensitive to radiation.

2q: Contrasts used in USG ?

a. urograffin
b. ultragraffin
c. sonavist
d. conray
e. barium

answer c. sonavist only . Some commonly used contrast agents are : 1. sonavist 2. sonovue 3. sono Rx 4. sonogen 5. echogen 6. quantison 7. optison 8. imavist 9. levovist 10. myomap 11. filmix 12. definity 13. omalex 14. bisphere

3q: double bubble sign is seen in ?

a. duodenal atresia
b. ileal atresia
c. pyloric stenosis
d. pancreatic divisum
e. volvulus

answer a and c are answers . duodenal atresia and pyloric stenosis . other causes are ladd's band,annular pancreas and pancreatic pseudocyst.

4q: Radiation emitted by Ir-192 is ?

a. 0.5 MeV
b. 0.6 MeV
c. 0.66 MeV
d. 0.666 MeV
e. 0.47 MeV

answer e. 0.47 MeV

5q: Which of the following statements are true about MRCP ?

a. MRI is used to obtain the images
b. CT is used for the images
c. it shows the biliary tree
d. dye has to be injected endoscopically
e. it is an invasive procedure

answer a and c are true statements.