FRCR TEST SERIES
CONTACT ON ngdrkus0201@gmail.com for taking more tests .
TEST PAPER-1
(FRCR-PHYSICS)
· There are FORTY (40) questions .
· Each question has FIVE/FOUR choices .There may be more than one correct answer .
· Negative marking is there for each incorrect choice.
· No marks for unanswered questions.
· Pl do not take time more than 60 minutes.
· Pl donot take help of books /net/friend .This test is to evaluate yourself.
Post answer in the comment below with email(upto 31.07.2014 /12 pm) .one getting highest marks would get free copy of book
Type: e-book
Genre: Diet & Health, Medicine & Science
Language: English
Price: Rs.275.00
- See more at: http://pothi.com/pothi/book/ebook-nagendra-kumar-sinha-frcr-part-1#sthash.rksE5qF4.dpuf
CONTACT ON ngdr0201@gmail.com for taking more tests
1)True statement
about Magnetization
vector
a)Magnetization
vector is obtained by
adding up of MDM
of all nuclei of a
sample
b) The excess nuclei
in the higher energy
state give a net
MDM component
along the field
c) For all nuclei,
perpendicular
components of MDM
for both spin-up and
spin-down add up to
zero
d) Magnetization
vector has spin
angular momentum
e) Magnetization
vector ,being parallel
to the magnetic field,
it can precess about
magnetic field
2) True about proton
density weighted
images are
a)Long TR and short
TE
b) As short as
possible TE (15ms) is
used to reduce the
effect of T1
c) Long TR (1000-
3000ms) is used to
reduce effect of T2
on contrast
d) Greater is PD,
stronger is signal and
brighter the pixel
e) CSF and fat appear
bright
3) True about upper
and lower part of k
space are
a)Data from shallow
encoding gradient
b) High spatial
frequenc
c) better detail
d)Stronger signal
e)Both high and low
frequencies
4)True about threedimensional
imaging(volume
imaging)
a) A steep gradient is
used to select thick
slice, enough to
include whole
volume to be imaged
b)Frequency
encoding is used
along one axis
c) Phase encoding is
used along two axis
including slice
selection direction
d) Data processing
requirements are
decreased
e) Motion artefacts
and phase
wraparound artefacts
noted
5) Artifact in MRI can
be reduced by
a) aliasing can be
reduced by enlarging
FOV or better match
surface coil
b) chemical shift can
be reduced by
reducing frequency
bandwidth
c)Motion artifact can
be reduced by
swapping phase and
frequency
d) Magnetic
susceptibility can be
reduced by use of
GRE sequence
e) Truncation can be
reduced by reducing
phase encoding
6)True regarding
gradient coil are
a) the slice select
gradient is switched
on during the
application of the RF
pulse
b)Frequency
encoding gradient is
switched during
receive of MR echo
c)Phase encoding
gradient is switched
between 90 and 180
degree pulse
d)Rapid switching off
of gradient produce a
loud bang
e)DC current is used
in gradient coil
7)True regarding
slice thickness and
interspaces
a)increase in slice
thickness, increases
SNR
b)decrease in slice
thickness decrease
spatial resolution
c) decreases in slice
thickness increase
partial volume effect
d) increase in slice
interspaces reduces
cross talk
e) increase in slice
thickness enables
larger volume
scanning
8) Regarding MRI,
which of following is
true
a)Mri uses
microwaves and
magnetic fields
b)Atom with odd
number of proton
possess nuclear
magnetic resonance
c)Hydrogen has large
magnetic moment
d)Hydrogen is
abundant in water
but low in fat
e)Hydrogen provides
the best MRI signal
9) True regarding
multiecho imaging
a)Allows acquisition
of more than one TE
echo from one slice
b) Different TE time
c) The TR are same
for all images
d) The signal strength
of the echo remains
same with
lengthening of TE
time
e) images obtained
from
echoes with longer
TE intervals will
contain more noises,
and so less contrast
10)True statements
are
a)Phase coherence
refers to the
relationship among
precessing transverse
magnetization
vectors
b) In biological
tissues, except fluids,
the T2 is typically five
to ten times shorter
than the T1
c) T2* incorporates
both the tissueT1
value and the
contribution from
field inhomogeneities
d)T2* depend upon
the magnitude and
distribution of field
inhogeneities as well
as the size and shape
of the voxel
e) T2* is due to
irreversible
dephasing
11)True regarding
GRE
a) Unlike 2D,in 3D
GRE , slices are truly
contiguous and
motion artefacts are
reduced
b)MP-RAGE is an
inversion recovery
magnetizationprepared
2D GRE
acquisition
c)MP-RAGE is useful
in fMRI
d) TurboFLASH is a
single shot GRE
e)GRE is not sensitive
to hemorrhage
12) True regarding flow compensation
a) A method for
reducing flow and
motion artifact
b) decrease signal
intensity from
flowing blood and
CSF
c) Suppress ghost
artifacts arising from
csf
d) Used in contrast
enhanced MR
angiography
e) Reduce/eliminate
CSF flow void sign in
the aqueduct of
sylvious
13)True regarding fat
suppression
a)Protons in lipid is
associated with
denser electron cloud
than that in water
molecules
b)At 1.5T, hydrogen
nuclei in fat
molecules precess at
approximately 210Hz
above hydrogen
nuclei in water
c)CHESS fat
suppression uses
binomial hard pulses
d) CHESS does not
require stringent
static magnetic field
e)Additional time
requirement is a
major drawback of
CHESS fat saturation
14) True regarding
artifact in EPI
a) Breathing or
cardiac pulsation
cause ghost artifact
in single shot artifact
b)N/2 ghosts cause
duplicate images of
the object
c)N/2 ghosts
propagate along the
frequency encoding
direction
d)N/2 ghosts are due
to slight mismatch in
timings of the odd
and even echoes
e)Gradient stability
may reduce N/2
ghosts
15) True regarding T1
agents
a) Increase the rate
of relaxation
proportional to the
amount of contrast
agent
b) Transverse
relaxivity is less than
the longitudinal
relaxivity
c)Relaxivity is
proportional to the
number of innersphere
water
molecules
d) Relaxivities of aqua
ions are proportional
to the magnetic
moment
e)Magnetic moment
of Gd is 8 Bohr
Magneton
16)True regarding CE
MRA
a)Contrast (Gd) is
used to shorten T2 of
blood
b) vessel appears
bright
c) Sensitivity to
turbulence is
dramatically reduced
d) In-plane saturation
are eliminated
e) Intrinsically fast
17) True regarding
transducer with high
Q-value
a) has narrower
bandwidth as
transmitter
b) has narrower
bandwidth as
receiver
c) produce pure note
d) heavy damping
e) good for pulsed
ultrasound
18)True regarding
ultrasound contrast
agents
a)Air-filled
microspheres
improve ventricular
visualization
diagnosis of DVT
b) Low- solubility gas
encapsulated in a
lipid wall is used in
vascular application
c)Perfluorocarbonnan
oprticles are used to
improve imaging of
peripheral vascular
disease
d)Perfluorocarbon
nanoparticles stay in
blood transiently for
seconds
e)Gold-bound
colloidal microtubes
may be
immunologically
targeted
19)True regarding
pulsed Doppler
a)Sampling volume is
positioned over the
vessel of interest
b)Range gate is set
to receive echoes
only from selected
sampling volume
c) A low PRF is
chosen for superficial
vessel
d) As range setting is
increased, the PRF is
increased
e) The depth of
sampling volume
determines the PRF
needed
20) True regarding
matching layer
a)It is used in front of
transducer
b) Improve
transmission of
ultrasound from
transducer to patient
and not vice-versa
c) The thickness of
matching layer must
be equal to half of
ultrasound
wavelength in the
matching layer
d)Impedance of
matching layer must
be similar to that of
soft tissue
e)Made of mixture of
aluminium powder
and epoxy resin
21. All are true regarding signal of brain tissue except
a.gray matter appear brighter than white matter on proton density weighted image
b.gray matter appear brighter than white matter on T2W weighted image
c.white matter appear brighter than gray matter on T1W weighted image
d.gray matter appear brighter than whitematter on T1 weighted image
22.ALARP in radioprotection stands for
a.as least as reasonably practicable
b.as low as rationally practicable
c.as light as reasonably practicable
d.as low as reasonably permissible
23.Correctly matched half-lives are all except
a.Technetium-99m---6hrs
b.iodine 123----------- 13hrs
c.iodine 131----------- 8days
d.iodine ---------- 60hrs
24.Gamma rays are emitted by
a.99mTc
b.123I
c.both
d.none
25.All are correct use of Technetium linked molecule except
a.methylene diphosphonate for bone imaging
b.HMPAO for cerebral imaging
c.DMSA and MAG3 for renal studies
d.HIDA for cardiac finction
26.All are true regarding radiations except (H)
a.radiation exposure may be natural (50%) or man-made(50%)
b.Radon gas account for majority of(37%) natural radiation exposure
c.CT account for 50% of man-made radiation exposure
d.CT is responsible for 5% of all radiation exposure
27.drugs used in case of internal contamination with cesium and thallium(H)
a.prussian blue
b.potassium iodide
c.oral phosphate
d.ammonium chloride
28.All are true regarding lymphocyte in radition exposure except
a.Absolute lymphocyte count is a sensitive marker for radiation damage
b.Absolute lymphocyte count correlate with exposure but not prognosis
c.Lymphocyte chromosomal analysis detect radiation exposure as low as .03-.06gray
d.dicentric chromosome and ring forms aberration noted in lymphocyte after radiation exposure
29.All are true regarding MR angiography except(H)
a.Phase contrast MRA takes longer time than TOF
b.Phase contrast MRA reveal velocity and direction of blood flow
c.Phase contrast MRA provide excellent suppression of high signal- intensity backround structures
d.Selective venous and arterial MRA images cannot be obtained with Phase contrast MRA
30.Dose of radiation during whole body exposure that leads to hematological syndrome is
a.2Gy
b.10Gy
c.100Gy
d.200Gy
31.True regarding characteristic radiation.
a.results after ejection of the electrons from the inner orbits of the target
b.a cathode electron must have energy of more than 80 keV to eject the k shell electron of tungsten
c.In tungaten, energy of k-characteristic radiation depend on the energy of striking electrons
d.In tungsten ,energy of k-charecteristic radiation and L-characteristic radiation is about 59 keV and 11 keV respectively
e.between 80 and 150 kVp,K-shell characteristic radiation contribution is about 10-28% of useful x-ray beam
32.True regarding intensity of x ray
a.the wavelength of characteristic x ray depend upon the kVp
b.greater the m A ,more is x rays produced
c.the quality of x ray depend almost entirely on the x ray tube current
d.heat production in the x ray tube is minimized by using the line focus principle and a rotating anode
e.molybdunum anode producing charecteristic radiation (17.5 and 19.6 keV) makes up significant portion of the total radiation
33.True regarding photoelectric effect
a.the incident photon energy should be more than the binding energy of electrons
b. produce a photoelectron that has great penetrating capacity
c.the incident photon is deflected in photoelectric effect
d.characteristic radiation is produced
e.produce a positive ion
34.True regarding Compton reaction.
a.probability of Compton reaction depend on the total number of electrons
b.the number of Compton reaction is dependent on the atomic number of the absorber
c.the number of Compton reaction gradually increase as photon energy increases
d.probability of Compton reaction depend on density of the absorber
e.Compton effect is not a issue in fluoroscopy
35.True regarding attenuation of monochromatic radiation.
a.reduction in quantity (no of photons)
b.reduction of quality (energies)
c. arithmetic attenuation as passes through the matter
d. straight line on semi-logarithmic graph
e.the attenuation coefficient measure of attenuation
36.In the equation N=N0e-mu x k, symbols used are
a.N stands for the number of incident photons
b.NO stands foe the number of transmitted photons
c.e stands for base of natural logarithm
d.mu. stands for linear attenuation coefficient
e.k stands for absorber thickness in cm
37.True regarding density and interaction
a.density determines the tissue’s stopping power
b.determines the number of electrons present in a given thickness
c.there is non linear relationship between density and attenuation
d.the number of Compton reaction depend on the number of electrons present in a given thickness
e.absorbers with many electrons are less impervious to radiation than absorbers with few electrons
38.True regarding K-edge filter
a.make use of the K-absotption edge of elements with atomic number >60.
b.transmit a significantly broader spectrum of energies than aluminum
c.filtered beam has decreased number of both low and high energy photons
d.decrease the patients ‘s absorbed dose
e.decreases image contrast
39.True regarding focus- grid distance decentering.
a.the target of x-ray tube is positioned above or below the convergent line
b.the cutoff is greater with near than with far focus-grid decentering
c.the central portion of the film is not affected
d.parallel grids have a high grid ratio to minimise cutoff
e.serious problem arise due to far focus-grid decentering in parallel grid
40.True regarding developer
a.developing solution contain hydroquinone or phenindone or metol
b.strong alkali needed to activate hydroquinone
c.hydroquinone developer is characterized by high speed ,low contrast and fine grain
d.no synergistic effect on rate development by hydroquinone and metol
e.phenindone was discovered in 1940.
ANSWER SHEET
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
