4404693
Descripción
Test por Thea Ampofo, actualizado hace más de 1 año
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Creado por Thea Ampofo
hace más de 8 años
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Pregunta 1
Pregunta
Thorough patient preparation should include which of the following
Respuesta
-
Proper patient screening
-
Complete patient medical history
-
Adequate patient education
-
All of the above
Pregunta 2
Pregunta
Proper patient screening should include which of the following
Respuesta
-
The elimination of any loose metal objects and personal items
-
The identification of any possible contraindications
-
The identification of any biomedical implants
-
All of the above
Pregunta 3
Pregunta
Complete medical history should include which of the following
Respuesta
-
Patient age, sex, and weight
-
Current physical symptoms
-
Previous surgeries and associated medical problems
-
All of the above
Pregunta 4
Pregunta
Adequate patient education should include which of the following
Respuesta
-
Thorough description of the procedure
-
Complete physics review
-
The importance of remaining still
-
Thorough description of the procedure & The importance of remaining still
Pregunta 5
Pregunta
Ancillary equipment that should be excluded from the magnetic room includes
which of the following
Respuesta
-
Ferrous oxygen tanks
-
Battery powered IV pumps
-
Ferrous scissors, pens and hemostats
-
All of the above
Pregunta 6
Pregunta
Ancillary equipment that should be included in an MRI department includes
which of the following
Respuesta
-
Non-ferrous wheelchair or stretcher
-
Proper monitoring equipment for sedated patients
-
A crash cart for emergency situations
-
All of the above
Pregunta 7
Pregunta
Which of the following ancillary staff should be trained in the safety procedures
of the MRI department?
Respuesta
-
Janitorial staff
-
Nursing staff
-
MRI department clerical staff
-
All of the above
Pregunta 8
Pregunta
Which of the following pieces of equipment should be used and or available
when sedating patients for an MRI examination
Respuesta
-
Pulse oximeter
-
Blood pressure monitor
-
Crash cart
-
All of the above
Pregunta 9
Pregunta
Which of the following patient injuries can be caused by improper placement
of cardiac leads
Respuesta
-
Patient burns
-
Temporary hearing loss
-
Short term memory loss
-
None of the above
Pregunta 10
Pregunta
RF coils should be looped during scanning to improve signal to noise.
Respuesta
-
True
-
False
Pregunta 11
Pregunta
Which of the following is an important environmental consideration necessary
to maintain proper computer and gradient function
Respuesta
-
Temperature
-
Barometric pressure
-
Humidity
-
Temperature & Humidity
Pregunta 12
Pregunta
Which of the following objects should not be permitted past the 5 gauss line
Respuesta
-
Cardiac pacemaker
-
Hearing aids
-
Neuro stimulators
-
All of the above
Pregunta 13
Pregunta
Which of the following objects will be affected by a magnetic field of 10
gauss or higher
Respuesta
-
Video cameras
-
Monitors
-
Cameras
-
All of the above
Pregunta 14
Pregunta
Metal implants within the body, depending on the location, can pose what type
of problems during the MRI exam
Respuesta
-
Torque
-
Heating
-
Artifacts
-
All of the above
Pregunta 15
Pregunta
Hazards to patients and technologists due to ferromagnetic objects within the
scan room include which ofthe following
Respuesta
-
Metal projectiles
-
Tissue burns
-
Image artifacts
-
None of the above
Pregunta 16
Pregunta
The force on a ferromagnetic object placed in a magnetic field is dependent
upon which of the following factors
Respuesta
-
The mass of the object
-
The distance from the magnet
-
The object's orientation to the magnet
-
All of the above
Pregunta 17
Pregunta
Which of the following patients should be absolutely excluded from having an
MRI exam
Respuesta
-
Patients with hip replacements
-
Patients with titanium aneurysm clips
-
Patients with cardiac pacemakers
-
Patients with cornea implants
Pregunta 18
Pregunta
Which of the following patients should be monitored with a pulse oximeter
during an MRI procedure
Respuesta
-
Sedated patients
-
Unconscious patients
-
Patients with weak voices or hearing problems
-
All of the above
Pregunta 19
Pregunta
Which of the following hazards can occur due to an improperly ventilated
quench
Respuesta
-
Frostbite due to decrease room temperature
-
Hearing loss due to increased air pressure in the scan room
-
Patient suffocation due to loss of oxygen
-
All of the above
Pregunta 20
Pregunta
The magnetic field that surrounds the Earth has what field strength
Respuesta
-
.5 Tesla
-
.6 Tesla
-
.5 Gauss
-
1.5 Tesla
Pregunta 21
Pregunta
Biological effects associated with exposure to static magnetic fields below
2 tesla include which of the following
Respuesta
-
Increased amplitude at the T wave on an EKG
-
Nausea and vomiting
-
Minimal increase in body temperature
-
Increased amplitude at the T wave on an EKG & Minimal increase in body temperature
Pregunta 22
Pregunta
Biological effects associated with exposure to static magnetic fields above
2 tesla include which of the following
Respuesta
-
Fatigue
-
Headaches
-
Hypotension
-
All ofthe above
Pregunta 23
Pregunta
Possible biological effects associated with exposure to gradient magnetic
fields at levels higher than that used in MRI include which of the following
Respuesta
-
Voltage produced in conductive tissue
-
Hypertension
-
Tissue bums
-
None of the above
Pregunta 24
Pregunta
Biological effects associated with exposure to radio frequency include which
of the following
Respuesta
-
Induction of electrical currents in tissue
-
Heating due to tissue resistance
-
Radiation poisoning
-
Induction of electrical currents in tissue & Heating due to tissue resistance
Pregunta 25
Pregunta
The rate at which a patient can safely dissipate excess heat caused by RF
energy is known as
Respuesta
-
Specific absorption time
-
Specific absorption rate
-
Signal absorption rate
-
None of the above
Pregunta 26
Pregunta
Specific absorption rate is expressed in units of
Respuesta
-
Watts/kg
-
Ohms/kg
-
Amps/kg
-
Watts/lb
Pregunta 27
Pregunta
Heating that is directly associated with the RF pulse sequence should not
increase the core body temperature greater than
Respuesta
-
1 degree Fahrenheit
-
1 degree Kelvin
-
10 degrees Celsius
-
1 degree Celsius
Pregunta 28
Pregunta
Which of the following is a biological effect unique to echo planar imaging
Respuesta
-
Visual phosphenes
-
Muscular twitches in face and back
-
Tissue bums
-
None of the above
Pregunta 29
Pregunta
Specific absorption rate is dependent upon which factor(s)
Respuesta
-
Induced electrical field and tissue density
-
Patient size and pulse duty cycle
-
Tissue conductivity
-
All of the above
Pregunta 30
Pregunta
The recommended whole body SAR limit for MR imaging is
Respuesta
-
.4 Watts/kg
-
3.2 Watts/kg
-
8 Watts/kg
-
4.0 Watts/kg
Pregunta 31
Pregunta
The recommended SAR limit for safely imaging the head is
Respuesta
-
.4 Watts/k
-
3.2 Watts/kg
-
8 Watts/kg
-
4.0 Watts/kg
Pregunta 32
Pregunta
The recommended SAR limit for safely imaging small volumes is
Respuesta
-
.4 Watts/kg
-
3.2 Watts/kg
-
8 Watts/kg
-
4.0 Watts/kg
Pregunta 33
Pregunta
The effect of MRI contrast media on tissue relaxation rates is known as
Respuesta
-
Relaxation
-
Relaxivity
-
Realization
-
None of the above
Pregunta 34
Pregunta
Contrast agents presently used in MRI have what type of effect on tissue
Respuesta
-
Increase T2 relaxation times
-
Decrease Tl relaxation times
-
Increase Tl relaxation times
-
None of the above
Pregunta 35
Pregunta
The first material used by Felix Bloch to change magnetic relaxation times was
known as
Respuesta
-
Niobium-Titanium
-
Gadopentetate dimeglumine
-
Ferric Nitrate
-
Nickel-Cadmium
Pregunta 36
Pregunta
The first use of a paramagnetic agent on a human subject was in what year
Respuesta
-
1976
-
1981
-
1946
-
1973
Pregunta 37
Pregunta
The first oral MRl contrast agent used in a human subject was known as
Respuesta
-
Niobium-Titanium
-
Ferric Chloride
-
Ferric Nitrate
-
Gadopentetate dimeglumine
Pregunta 38
Pregunta
The first intravenous MRl contrast agent that was used on a human subject
was known as
Respuesta
-
Niobium-Titanium
-
Ferric Chloride
-
Ferric Nitrate
-
Gadopentetate dimeglumine
Pregunta 39
Pregunta
Gadolinium has how many unpaired electrons in its outermost orbit
Respuesta
-
5
-
7
-
9
-
11
Pregunta 40
Pregunta
MRI contrast agents known as TI agents produce what type of contrast
on Tl weighted images
Respuesta
-
Positive
-
Negative
Pregunta 41
Pregunta
MRl contrast agents known as T2 agents produce what type of contrast
on T2 weighted images
Respuesta
-
Positive
-
Negative
Pregunta 42
Pregunta
MRI contrast agents known as T2 agents have what type of effect on tissue
Respuesta
-
Increase T2 relaxation times
-
Increase Tl relaxation times
-
Decrease T2 relaxation times
-
None of the above
Pregunta 43
Pregunta
Which ofthe following is a requirement for a chemical before it can be used as
an MRI contrast medium
Respuesta
-
It must decrease magnetic relaxation times
-
Must be non-ionic
-
Must be biologically compatible with the human body
-
It must decrease magnetic relaxation times & Must be biologically compatible with the human body
Pregunta 44
Pregunta
The chemical compounds used to bind the metallic ion in MRI contrast agents
are known as
Respuesta
-
Hydrophilies
-
Chelates
-
Macrophanges
-
None of the above
Pregunta 45
Pregunta
To minimize MRl contrast agent's toxicity, the agent should be
Respuesta
-
Excreted intact by the kidneys
-
Excreted intact by the gallbladder and intestines
-
Released within the body
-
Excreted intact by the kidneys & Excreted intact by the gallbladder and intestines
Pregunta 46
Pregunta
The amount of a drug required to cause death in half ofa sample of laboratory
mice is known as
Respuesta
-
LDso
-
LRso
-
Median lethal dose
-
LDso & Median lethal dose
Pregunta 47
Pregunta
Which of the following is the median lethal dose of Gadopentetate
dimeglumine
Respuesta
-
.5 mmol/kg
-
5 mmol/kg
-
1 mmol/kg
-
10-20 mmol/kg
Pregunta 48
Pregunta
Contrast agents that stay electrically neutral in water and do not separate into
ions are said to be
Respuesta
-
Hydrophilic
-
Nonionic
-
Ionic
-
None of the above
Pregunta 49
Pregunta
Contrast agents that separate into charged ions in water are said to be
Respuesta
-
Hydrophobic
-
Nonionic
-
Ionic
-
None of the above
Pregunta 50
Pregunta
The diffusion of fluid thorough a semipermeable membrane such as the wall
of a living cell is known as
Respuesta
-
Hydrosis
-
Ionization
-
Osmosis
-
None of the above
Pregunta 51
Pregunta
The osmolality of a contrast agent is measured in what unit
Respuesta
-
Osmoles per kilogram of water (Osm/kg)
-
Milliosmoles per kilogram of water (mOsm/kg)
-
Milliliters per kiloliter (mllkl)
-
Osmoles per kilogram of water (Osm/kg) & Milliosmoles per kilogram of water (mOsm/kg)
Pregunta 52
Pregunta
The effective clinical dosage of gadolinium is how many millimoles per
kilogram of body weight
Respuesta
-
1:0 mmol/kg
-
0.1 mmol/kg
-
10 mmol/kg
-
20 mmol/kg
Pregunta 53
Pregunta
Which of the following is a possible side effect of gadopentetate
dimeglumine
Respuesta
-
Mild, temporary headaches
-
Nausea
-
Vomiting
-
All of the above
Pregunta 54
Pregunta
Gd DTPA, also known as Magnevist, is bound by which chelate
Respuesta
-
Bismethylamide
-
Diethylenetriamine pentaacetic acid
-
Tertraazacyclododecane tetraacetic acid
-
None of the above
Pregunta 55
Pregunta
Gd DOTA, also known as Dotarem, is bound by what chelate
Respuesta
-
Bismethylamide
-
Diethylenetriamine pentaacetic acid
-
Tertraazacyclododecane tetraacetic acid
-
None of the above
Pregunta 56
Pregunta
Gd DTPA-BMA, also known as Omniscan, is bound by what chel
Respuesta
-
Bismethylamide
-
Diethylenetriamine pentaacetic acid
-
Tertraazacyclododecane tetraacetic acid
-
None of the above
Pregunta 57
Pregunta
Gadoteridol, also known as ProHance, is based on what type of molecular
structure
Respuesta
-
Linear ionic
-
Linear nonionic
-
Macrocyclic ionic
-
Macrocyclic nonionic
Pregunta 58
Pregunta
Gadopentetate dimeglumine, also known as Magnevist, is based on what type
of molecular structure
Respuesta
-
Linear ionic
-
Linear nonionic
-
Macrocyclic ionic
-
Macrocyclic nonionic
Pregunta 59
Pregunta
Gadodiamide, also known as Omniscan, is based on what type of molecular
structure
Respuesta
-
Linear ionic
-
Linear nonionic
-
Macrocyclic ionic
-
Macrocyclic nonionic
Pregunta 60
Pregunta
Gadoterate meglumine, also known as Dotarem, is based on what type of
molecular structure
Respuesta
-
Linear ionic
-
Linear nonionic
-
Macrocyclic ionic
-
Macrocyclic nonionic
Pregunta 61
Pregunta
Which of the following is a clinical indication for the use of MRI contrast
agents
Respuesta
-
CNS tumors
-
Post surgical lumbar discs
-
Infection
-
All of the above
Pregunta 62
Pregunta
Structures that are outside the blood brain barrier are said to be
Respuesta
-
Extra axial
-
Intra axial
-
Para axial
-
None of the above
Pregunta 63
Pregunta
The type of neoplasms in the head that enhance primarily due to their increase
in vascularity are known as
Respuesta
-
Intra axial neoplasms
-
Extra axial neoplasms
-
Metastatic neoplasms
-
None of the above
Pregunta 64
Pregunta
Which of the following is an example of an extra axial neoplasm
Respuesta
-
Meningioma
-
Astrocytoma
-
Acoustic Neuroma
-
Meningioma & Astrocytoma
Pregunta 65
Pregunta
The type ofneoplasms in the head that enhance primarily due to the
breakdown of the blood brain barrier are known as
Respuesta
-
Intra axial neoplasms
-
Extra axial neoplasms
-
Acoustic neuromas
-
None of the above
Pregunta 66
Pregunta
Which of the following is an example of an intra axial neoplasm
Respuesta
-
Acoustic neuroma
-
Meningioma
-
Astrocytoma
-
Acoustic neuroma & Meningioma
Pregunta 67
Pregunta
Which area outside the blood brain barrier shows normal enhancement with
the injection of gadolinium
Respuesta
-
Choroid plexus
-
Pineal gland
-
Pituitary gland
-
All of the above
Pregunta 68
Pregunta
Which ofthe following is an example of a non-neoplastic disease of the brain
that enhances with the injection of gadolinium
Respuesta
-
Meningitis
-
Demyelinating disease
-
Cerebral infection
-
All of the above
Pregunta 69
Pregunta
Neoplasms within the spinal cord are said to be located in which of the
following locations
Respuesta
-
Intramedullary
-
Extramedullary Intradural
-
Extradural
-
None of the above
Pregunta 70
Pregunta
Neoplasms outside the spinal cord but within the CSF space are said to be
located in which of the following locations
Respuesta
-
Intramedullary
-
Extramedullary Intradural
-
Extradural
-
None of the above
Pregunta 71
Pregunta
Neoplasms of the spine that are outside the spinal cord and outside the CSF
space are said to be located in which of the following locations
Respuesta
-
Intramedullary
-
Extramedullary Intradural
-
Extradural
-
None of the above
Pregunta 72
Pregunta
Which of the following pathologies of the spine is an indication for the use
of an MRl contrast agent
Respuesta
-
Spinal cord infection
-
Recurrent disc herniation
-
Intramedullary neoplasm
-
All of the above
Pregunta 73
Pregunta
Which of the following is a contraindication for the use of gadolinium
Respuesta
-
Patients with history of metastatic cancer
-
Patients with history of asthma
-
Patients with history of metal implants
-
No known contraindications
Pregunta 74
Pregunta
Which of the following is a precaution for the use of gadolinium
Respuesta
-
Patients with sickle cell anemia
-
Patients with a history of grand mal seizures
-
Patients with a history of asthma
-
All of the above
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