radio 1

Question 1

Decrease in mA decreases radiation dose significantly in pediatric chest, quality of radiation generated depends upon voltage, radiation dose is directly related to time of exposure

Answer 1

CT SCAN

Question 2

Slice of tissue X rays

Answer 2

Tomography

Question 3

First generation CT scan

Answer 3

translate rotation

Question 4

Continuous helical acquisition of data in CT scanner with 360* continuous rotation of gantry was possible because of

Answer 4

Slip ring technology

Question 5

CT/Hounsfield number depends on

Answer 5

mass density

Question 6

CT scan was invented by

Answer 6

Geoffrey hounsfield

Question 7

0 HU correspond to

Answer 7

water

Question 8

HU less than 0 on CT is seen in

Answer 8

Fat Blood

Question 9

Hounsfield number for cystic lesions

Answer 9

10 HU

Question 10

In CT scan, greater X ray attenuation in areas of

Answer 10

high density

Question 11

Walls of CT scanner room are coated with

Answer 11

LEAD

Question 12

Thickness of Lead apron to prevent radiation

Answer 12

0.5mm

Question 13

CT dose index

Answer 13

In pediatric patients dose is reduced

Question 14

CT is more sensitive than MRI in detection of

Answer 14

Calvarial lesions

Question 15

CT scan will NOT reveal

Answer 15

Grey and white matter differentiation

Question 16

CECT is least useful in diagnosis of

Answer 16

Subclavian steal syndrome

Question 17

HRCT utilizes

Answer 17

Bone algorithm for image reconstruction

Question 18

Real time imaging is NOT possible with

Answer 18

spiral CT