Compre Exam

Question 1

Which artifact is commonly seen in performing CT scan for the base of the skull

Answer 1

Beam Hardening Artifact

Question 2

Which of the following principles define helical scanning except

Answer 2

uninterrupted table movement

Question 3

Higher CT number

Answer 3

brighter

Question 4

Converts light to electrical signal

Answer 4

photodiode

Question 5

x-ray to light

Answer 5

scintillators

Question 6

x-ray to light (phosphor layer)
IS :intensifies the emitted photon

Answer 6

reflective layer

Question 7

Which modality has the best spatial resolution

Answer 7

xray

Question 8

Which modality has the best contrast

Answer 8

MRI (but in terms of ct and xray the answer is ct)

Question 9

Most common detector today preferred material

Answer 9

Gadolinium

Question 10

Most common beam shaping device

Answer 10

Teflon

Question 11

Most common detector element made with

Answer 11

ceramic material

Question 12

Most common cause of x-ray table failure

Answer 12

Tungsten vaporization

Question 13

What is/are the other names for scout

Answer 13

AOTA
(localizer, topogram, surview)

Question 14

Mathematical formula in general

Answer 14

Algorithm

Question 15

CT is superior in conventional radiography in terms of

Answer 15

contrast resolution

Question 16

Conventional is superior in conventional radiography
in terms of

Answer 16

Spatial Resolution

Question 17

In CT scan there are 2 sets

Answer 17

Pre patient/Pre
detector, Post patient

Question 18

Filter

Answer 18

bow tie, flat

Question 19

What is the 2 dimensional representation

Answer 19

Pixel

Question 20

What is the 3 dimensional representation

Answer 20

Voxel

Question 21

CT number for fat

Answer 21

-100

Question 22

CT technique to visualize the venous vessels for the
blood

Answer 22

CT angiography