C:-Aluminium
D:-Cadmium
Correct Answer:- Option-B
Question49:-Maximum sensitivity of human foetus occur during ______ day of gestation.
A:-60 - 80
B:-11 - 41
C:-71-91
D:-90 - 5
Correct Answer:- Option-B
Question50:-The thickness of protective apron in fluoroscopy is
A:-1 mm lead equivalent
B:-1.5 mm lead equivalent
C:-0.5 mm lead equivalent
D:-0.75 mm lead equivalent
Correct Answer:- Option-C
Question51:-Importance factors that reduce patient exposure during radiography includes all EXCEPT
A:-Low ۵۵
B:-Beam filtration
C:-Beam collimation
D:-High speed film screen system
Correct Answer:- Option-A
Question52:-X-ray receptors in a CR (Computer Radiography) system contains
A:-Silver bromide
B:-Calcium tungstate
C:-Zinc cadmium sulphide
D:-Europium doped barium fluro halide
Correct Answer:- Option-D
Question53:-The advantages of CR system are all EXCEPT
A:-Better image quality
B:-Faster and better post processing
C:-Cassette less department
D:-Significant reduction in exposure
Correct Answer:- Option-C
Question54:-Super conducting magnets are EXCEPT
A:-Super cooled
B:-Weight 5-10 tons
C:-Magnetic field always on
D:-High SNR and homogenicity
Correct Answer:- Option-C
Question55:-The stray magnetic field outside the bore of magnetic is called
A:-Shimming
B:-Precession
C:-Resonance
D:-Fringe field
Correct Answer:- Option-D
Question56:-The processional frequency of hydrogen for field strength 1.5 Tesla is
A:-21.3 MHz
B:-42.6 MHz
C:-6.39 MHz
D:-63.9 MHz
Correct Answer:- Option-D
Question57:-In *T_(1)° weighted images parameters are
A:-Short TR and short TE
B:-Short TR and long TE
C:-Long TE and long TR
D:-Long TR and short TE
Correct Answer:- Option-A
Question58:-The technology used in DR (Digital Radiography) are all EXCEPT
A:-Photo stimulated phosphor based system