ARMRIT EXAM QUESTIONS WITH CORRECT
ANSWERS
Different |tissues |that |have |signals |that |appear |similar |on |an |MR |image |are |described |as:
A) |hypointense
B) |hyperintense
C) |isointense
D) |isodense |- |CORRECT |ANSWER✔✔-isointense
in |a |large |main |magnetic |field |such |as |those |employed |in |MRI, |the |motion |of |a |hydrogen |
proton |has |been |described |as |wobbling |like |a |spinning |top. |this |motion |is |called
A) |precession
B) |resonance
C) |frequency
D) |angular |momentum |- |CORRECT |ANSWER✔✔-precession
magnetic |resonance |imaging |is |derived |from |the |process |known |as: |
A) |magnetic |resonance |angiography
B) |magnetic |relaxation |imaging
C) |nuclear |magnetic |resonance
D) |nuclear |resonance |imaging |- |CORRECT |ANSWER✔✔-nuclear |magnetic |resonance
Once |the |nmv |has |moved |away |from |equilibrium, |the |following |will |occur
A) |the |longitudinal |component |will |increase
,B) |the |transverse |component |will |decrease
C) |the |longitudinal |component |will |stay |the |same |
D) |the |transverse |component |will |increase |- |CORRECT |ANSWER✔✔-the |transverse |component |
will |increase
In |MR, |substances |respond |to |a |specific |radio |frequency |which |is |known |as:
A) |magnetic |frequency
B) |radio |frequency
C) |gyro-magnetic |frequency
D) |resonance |frequency |- |CORRECT |ANSWER✔✔-resonance |frequency
the |introduction |of |gadolinium |based |contrast |enhancement |agents |by |intra-venous |injection |
can |involve |passing |through |an |abnormal |blood |brain |barrier. |the |tissue |compartments |
involved |are |the:
A) |intravascular |to |interstitial
B) |extracellular |to |intracellular
C) |hepatobiliary |to |renal
D) |extradural |to |renal |- |CORRECT |ANSWER✔✔-intravascular |to |interstitial
t2 |is |the |measurement |of |time |fot |the |transverse |component |of |the |NMV |to |decrease |what |
percentage |of |its |maximum |value |after |the |application |of |a |90 |degree |radio-frequency |pulse
A) |33%
B) |63%
C) |37%
D) |67% |- |CORRECT |ANSWER✔✔-37%
in |the |USA, |the |MRI |system's |magnetic |field |and |vector |that |represents |it |is |symbolized:
,A) |B1
B) |B2
C) |B3
D) |B0 |- |CORRECT |ANSWER✔✔-B0
The |resonance |frequency |of |any |substance |in |a |magnetic |field |can |be |calculated |by |employing |
the |
A) |damadian |equation
B) |larmor |equation
C) |faraday |equation
D) |lauterbur |equation |- |CORRECT |ANSWER✔✔-Larmor |equation
in |a |pulse |sequence, |transmitting |an |initial |90 |degree |radio-frequency |pulse |will |cause |the |
NMV |to:
A) |remain |at |equilibrium |
B) |shift |in |both |size |and |direction
C) |move |to |antiparallel
D) |rephase |- |CORRECT |ANSWER✔✔-shift |in |both |size |and |direction
Which |type |of |electromagnetic |coils |are |designed |to |stimulate |and |detect |an |MR |signal?
A) |gradient |coils
B) |radio-frequency |coils
C) |shim |coils |- |CORRECT |ANSWER✔✔-radio-frequency
tissues |that |are |less |efficient |at |spin-spin |interactions |because |they |contain |more |free |water, |
such |as |CSF, |should |have
A) |High |T2 |values |and |produce |hypointense |signals
, B) |HIgh |T2 |values |and |produce |hyperintense |signals
C) |low |T2 |values |and |produce |hypointnese |signals |
D) |low |T2 |values |and |produce |hyperintense |signal |- |CORRECT |ANSWER✔✔-High |T2 |values |and
|produce |hyperintense |signals
magnetism |can |be |defined |as |the |ability |of |certain |substances |to |attract:
A) |Copper, |aluminum, |tin
B) |Iron, |cobalt, |nickel
C) |Bronze, |niobium, |titanium
D) |Neodymium, |niobium-titanium, |lodestone |- |CORRECT |ANSWER✔✔-Iron, |cobalt, |nickel
the |purpose |of |magnetic |resonance |angiography |is |to |image |the:
A) |stationary |soft |tissue
B) |blood |flow
C) |vessel |lumen
D) |only |abnormal |vessels |- |CORRECT |ANSWER✔✔-blood |flow
the |strength |of |very |large |magnetic |fields |like |those |employed |in |MRI |systems, |the |SI |unit |
most |commonly |used |is:
A) |Tesla
B) |Gauss
C) |Kilogauss
D) |militesla |- |CORRECT |ANSWER✔✔-Tesla
the |larmor |frequency |of |hydrogen |protons |in |a |1.5 |tesla |magnetic |field |is: |
A) |6.4 |MHZ/Tesla
B) |12.8 |MHz/Tesla
ANSWERS
Different |tissues |that |have |signals |that |appear |similar |on |an |MR |image |are |described |as:
A) |hypointense
B) |hyperintense
C) |isointense
D) |isodense |- |CORRECT |ANSWER✔✔-isointense
in |a |large |main |magnetic |field |such |as |those |employed |in |MRI, |the |motion |of |a |hydrogen |
proton |has |been |described |as |wobbling |like |a |spinning |top. |this |motion |is |called
A) |precession
B) |resonance
C) |frequency
D) |angular |momentum |- |CORRECT |ANSWER✔✔-precession
magnetic |resonance |imaging |is |derived |from |the |process |known |as: |
A) |magnetic |resonance |angiography
B) |magnetic |relaxation |imaging
C) |nuclear |magnetic |resonance
D) |nuclear |resonance |imaging |- |CORRECT |ANSWER✔✔-nuclear |magnetic |resonance
Once |the |nmv |has |moved |away |from |equilibrium, |the |following |will |occur
A) |the |longitudinal |component |will |increase
,B) |the |transverse |component |will |decrease
C) |the |longitudinal |component |will |stay |the |same |
D) |the |transverse |component |will |increase |- |CORRECT |ANSWER✔✔-the |transverse |component |
will |increase
In |MR, |substances |respond |to |a |specific |radio |frequency |which |is |known |as:
A) |magnetic |frequency
B) |radio |frequency
C) |gyro-magnetic |frequency
D) |resonance |frequency |- |CORRECT |ANSWER✔✔-resonance |frequency
the |introduction |of |gadolinium |based |contrast |enhancement |agents |by |intra-venous |injection |
can |involve |passing |through |an |abnormal |blood |brain |barrier. |the |tissue |compartments |
involved |are |the:
A) |intravascular |to |interstitial
B) |extracellular |to |intracellular
C) |hepatobiliary |to |renal
D) |extradural |to |renal |- |CORRECT |ANSWER✔✔-intravascular |to |interstitial
t2 |is |the |measurement |of |time |fot |the |transverse |component |of |the |NMV |to |decrease |what |
percentage |of |its |maximum |value |after |the |application |of |a |90 |degree |radio-frequency |pulse
A) |33%
B) |63%
C) |37%
D) |67% |- |CORRECT |ANSWER✔✔-37%
in |the |USA, |the |MRI |system's |magnetic |field |and |vector |that |represents |it |is |symbolized:
,A) |B1
B) |B2
C) |B3
D) |B0 |- |CORRECT |ANSWER✔✔-B0
The |resonance |frequency |of |any |substance |in |a |magnetic |field |can |be |calculated |by |employing |
the |
A) |damadian |equation
B) |larmor |equation
C) |faraday |equation
D) |lauterbur |equation |- |CORRECT |ANSWER✔✔-Larmor |equation
in |a |pulse |sequence, |transmitting |an |initial |90 |degree |radio-frequency |pulse |will |cause |the |
NMV |to:
A) |remain |at |equilibrium |
B) |shift |in |both |size |and |direction
C) |move |to |antiparallel
D) |rephase |- |CORRECT |ANSWER✔✔-shift |in |both |size |and |direction
Which |type |of |electromagnetic |coils |are |designed |to |stimulate |and |detect |an |MR |signal?
A) |gradient |coils
B) |radio-frequency |coils
C) |shim |coils |- |CORRECT |ANSWER✔✔-radio-frequency
tissues |that |are |less |efficient |at |spin-spin |interactions |because |they |contain |more |free |water, |
such |as |CSF, |should |have
A) |High |T2 |values |and |produce |hypointense |signals
, B) |HIgh |T2 |values |and |produce |hyperintense |signals
C) |low |T2 |values |and |produce |hypointnese |signals |
D) |low |T2 |values |and |produce |hyperintense |signal |- |CORRECT |ANSWER✔✔-High |T2 |values |and
|produce |hyperintense |signals
magnetism |can |be |defined |as |the |ability |of |certain |substances |to |attract:
A) |Copper, |aluminum, |tin
B) |Iron, |cobalt, |nickel
C) |Bronze, |niobium, |titanium
D) |Neodymium, |niobium-titanium, |lodestone |- |CORRECT |ANSWER✔✔-Iron, |cobalt, |nickel
the |purpose |of |magnetic |resonance |angiography |is |to |image |the:
A) |stationary |soft |tissue
B) |blood |flow
C) |vessel |lumen
D) |only |abnormal |vessels |- |CORRECT |ANSWER✔✔-blood |flow
the |strength |of |very |large |magnetic |fields |like |those |employed |in |MRI |systems, |the |SI |unit |
most |commonly |used |is:
A) |Tesla
B) |Gauss
C) |Kilogauss
D) |militesla |- |CORRECT |ANSWER✔✔-Tesla
the |larmor |frequency |of |hydrogen |protons |in |a |1.5 |tesla |magnetic |field |is: |
A) |6.4 |MHZ/Tesla
B) |12.8 |MHz/Tesla
