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