C:-05to1 mlead
D:-2 to 4 mm Al
Correct Answer:- Option-A
Question68:-The added filter used for the radiography of body part of uneven thickness is
A:-Heavy metal filters
B:-Inherent filtration
C:-Wedge filter
D:-None of the above
Correct Answer:- Option-C
Question69:-The magnitude of scattered radiation during radiography depends on
A:-Energy of x-ray
B:-Field size
C:-Thickness of patient
D:-All of the above
Correct Answer:- Option-D
Question70:-Grid ratio is the
A:-Ratio of the height of the lead strips to the width of the inter space material
B:-Number of lead strip lines per centimeter
C:-Ratio exposure with grid and without grid
D:-Ratio of contrast with and without grid
Correct Answer:- Option-A
Question71:-Which of the following is a method of scatter reduction in radiography other than using grid 7
A:-Use of collimator
B:-Scanning slit
C:-Air gap method
D:-All of the above
Correct Answer:- Option-D
Question72:-In spiral CT scanners
A:-No ring detectors
B:-Stationary x-ray tube
C:-Patient table stationary
D:-Patient table moving during scanning process
Correct Answer:- Option-D
Question73:-A radiation detector not suitable for the use in CT scanner is
A:-Sodium lodine Detector
muth Germanate Detector
C:-Fricke Detector
D:-Cadmium Tungstate
Correct Answer:- Option-C
Question74:-Main advantage of fourth generation CT scanner is
A:-Less patient dose
B:-Elimination of ring artifact
C:-Less scattered radiation
D:-All of the above
Correct Answer:- Option-B
Question75:-Qunatum mottle is due to
A:-Statistical fluctuation in the number of x-rays emitted from x-ray tube
B:-Patient motion
C:-Absorption of radiation by high density material
D:-Heterogeneous x-ray spectrum
Correct Answer:- Option-A
Question76:-CT number of dense bone is
A:-+100
B:-+1000
C:-+55
D:-+35
Correct Answer:- Option-B
Question77:-Ring of stationary detectors were introduced in
A:-First generation CT scanners