Shared Flashcard Set

Details

Hesi volume 3
CAPSTONE
194
Health Care
Undergraduate 4
04/26/2017

Additional Health Care Flashcards

 


 

Cards

Term
Which is the most likely result if an exposure is made without the use of a focusing cup?
Definition
Increased off focus radiation
Term
which substance is added to the X-ray tube housing to increase heat dissipation
Definition
oil
Term
Which term refers to the removal of an electron from the orbital shell of an atom
Definition
Ionization
Term
Which is the primary advantage of a rotating anode
Definition
Less heat is generated at the target
Term
Which effect does the focusing cup have on the stream of electrons traveling toward the anode?
Definition
Forces the electrons to stay close together
Term
How is the process of thermionic emission described
Definition
Electrons are released when the filament is heated
Term
Which type of interaction results in the production of bremsstrahlung x-rays
Definition
A projectile electron slows down near the nucleus of the target atom
Term
Which term is used to describe the intensity of the X-ray beam
Definition
quantity
Term
Which is the primary controlling factor for X-ray beam quality
Definition
KVP
Term
Which type of radiation Is produced when an outer shell electron fills an inner shell vacancy
Definition
characteristic
Term
which device provides the required amount of voltage for x ray production
Definition
transformer
Term
which effect does a step up transformer have on voltage and current
Definition
voltage is increased and current is decreased
Term
which device is located in the primary section of a general X-ray circuit
Definition
timer circuit
Term
at which location is the ionization chamber located in an AEC
Definition
Between the grid and the IR
Term
Which device in the tray circuit changes AC to DC
Definition
Rectifier
Term
In cassettes based CR systems, the photostimulable phosphor plate is made of which material
Definition
barium fluorohalide
Term
The collimator light must be aligned to the radiation field to within what percent of the SID
Definition
2%
Term
The kip displayed on the operator console should be accurate to within what percent of the measured kip
Definition
+/- 5%
Term
The center of the x ray beam must be aligned to the center of the Bucky tray to within what percent of the the SID
Definition
1%
Term
with all other factors remaining the same, a decrease in kip will cause an increase in which X-ray beam characteristic
Definition
wavelength
Term
what is an acceptable man readout during a linearity test if 50 was at 70 kip is used
Definition
46 mas
mas linearity must be within 10% either way of the selected station
Term
which factor will increase x ray beam quantity at the IR without increasing heat units produced by the tube
Definition
decreased filtration
Term
which set of exposure factors is most likely to provide clear visualization of the upper cervical spine through the mandible when performing and AP wagging jaw (Ottonello method) projection
Definition
75kvp 25 mas, 2.0 seconds
long time
Term
which ma station will result in a man value of 44 if the exposure time is .11 seconds
Definition
400 ma
Term
which x ray tube orientation represents the correct application of the anode heel effect
Definition
the anode ends positioned toward the head for an AP t spine projection
Term
a radiograph of the L5-S1 joint space was acquired using a conventional film screen system with the field size collimated to a 10x12 IR. A repeat exposure is then taken with the same exposure factors, but with an 8x10 field size. How will the smaller field size affect image quality
Definition
Contrast will increase
Term
a radiographic image was acquired at 80 kVp with AEC using a conventional film screen system. If a repeat exposure is taken at 90 kvp what change can be expected
Definition
exposure time will decrease
Term
a lateral lumbar spine image was obtained with a field size of 11x14 inches at 95 kVp and AEC with the center detector selected. The resulting image demonstrates excessive quantum noise. which is the most likely cause for this appearance
Definition
the patient was not accurately centered
Term
which procedure is most effective for reducing localized image blurring caused by involuntary patient motion
Definition
decrease exposure times
Term
which effect will a low signal to noise ration have on the appearance of a digital radiographic image
Definition
decreased contrast resolution
Term
which effect does switching to the small focal spot size have on the manifest image
Definition
image unsharpness decreases
Term
a radiograph of optimal density is produced at 15 mAs and an SID of 40 inches. Which was value is required to produce the same radiographic density if this exam is repeated at an SID Of
48 inches
Definition
22
Term
a fixed kVp variable ma chart recommends exposure factors of 70 kVp and 32 mAs for an AP abdomen projection on an average sized patient. based on this chart, which fixed kVp technique is most appropriate for an AP projection of a double contrast UGI image
Definition
90 kvp 8 mas
Term
a film screen image of the abdomen demonstrates appropriate density and scale of contrast, but motion blur is present due to peristalsis. if the original image was obtained with a 200 ma station and an exposure time of .35 seconds, which set of technical factors will produce a comparable exposure while minimizing motion artifact
Definition
500 ma and .14 seconds
Term
which is the best way to avoid excessive quantum noise when using cassette based digital systems
Definition
increase the amount of exposure to the IR
Term
all other factors remaining the same, how will increasing the SID from 40 inches to 60 inches affect the appearance of a radiographic image
Definition
decreased magnification
Term
which was value should be selected for a patient measuring 30 cm if 22 was is optimal for a patient measuring 25 cm
Definition
44 mas
4 to 5 cm requires was be increased by a factor of 2
Term
why is it important for the radiographer to observe the man readout at the end of each exposure when using AEC
Definition
this value may be used as a basis for calculating manual techniques
Term
a PA chest radiograph of an adult patient is acquired with a conventional film screen system using AEC. Both lung fields are demonstrated in their entirety, but the lung markings are not visible due to excessive exposure, which is the most likely cause of this appearance
Definition
incorrect AEC chamber selection
Term
which advantage is gained by increasing the standard SID from 40 inches to 48 inches
Definition
increased image resolution
Term
which set of technical factors is recommended when obtaining a conventional image of the sternum by blurring the overlying lung markings on a PA oblique projection
Definition
65 kVp and 10 ma at 3 seconds
shallow breathing, long time
Term
how are the AEC devices for mammography different from these used with diagnostic radiography
Definition
greater accuracy is required
Term
which radiopaque marker is image appropriate after micturition has taken place
Definition
post void
Term
which environment is most appropriate for film storage
Definition
60 degreesF 50% humidity
Term
which scenario will lead to overexposure on images when using automatic film processors
Definition
elevated developer temperature
Term
when using digital imaging, which has the greatest influence on contrast
Definition
LUT look up table
Term
which factors affect spatial resolution in digital imaging
Definition
smaller pixels
greater number of pixels
Term
which acronym describes a network of computers that manages digital images
Definition
PACS
Term
in which part of the automatic processor are exposed crystals reduced to black metallic silver
Definition
developer
Term
how does a wide window width affect an image
Definition
decreases contrast
Term
which post processing techniques may be used with digital imaging
Definition
electronic masking
filtering
smoothing
Term
which post processing action is always acceptable
Definition
annotating with an upright marker to show the patient was in an erect position
Term
how will raising the window level affect the digital image
Definition
increases brightness
Term
which term refers to a graphical representation of pixel values
Definition
histogram
Term
which statement describes a properly positioned lateral foot image
Definition
superimposition of the first and fifth metatarsal heads
Term
which statement describes the presence of patient rotation on a lateral cervical spine
Definition
anterior to posterior displacement of zygapophyseal joints
Term
with all other factors remaining the same, which SID results in the greatest exposure to the IR
Definition
40 inches
Term
which image, when performed according to normal standards, will demonstrate the greatest magnification of the anatomy of interest
Definition
Lateral cervical spine
Term
which factor will have the greatest impact on decreasing recorded detail or spatial resolution
Definition
Motion
Term
which scenario causes foreshortening on the anatomy of the image
Definition
the humerus in contact with the IR, the forearm lifted off the IR and the CR directed perpendicular to the long axis of the humerus
Term
which combination results in an image with the greatest recorded detail
Definition
2 inch OID 72 SID and 0.6 mm focal spot
Term
Which scenario may cause film to be fogged
Definition
using film past its expiration date
Term
which was setting is most likely to produce quantum mottle
Definition
2.5 mas
Term
how does aliasing appear radiographically when using CR
Definition
two superimposed images, slightly out of alignment
Term
consider these different abdomen images of the same patient. what most likely caused the difference in these images
Definition
image A was produced at a shorter SID
magnification
Term
this mobile cheese image lacks which required image element
Definition
anatomical markers
Term
Which practices are considered violations of the HIPPA
Definition
Looking up test results of a family member
Accessing medical images of a coworker
Term
according to the ARRT standard of ethics, a radiographer may be subject to sanctions including revocation of certification for which actions
Definition
Performing duties while under the influence of illegal drugs or alcohol
Performing a medical procedure without appropriate training or supervision
Failing to report a medical error because the patient was unharmed
Term
when a radiographer asks a patient to lie down on the imaging table and the patient complies, which type of consent has the patient given
Definition
Simple consent
Term
Which example of nonverbal communication is most effective for helping a patient overcome anxiety and apprehension prior to an exam
Definition
Maintain direct but appropriate eye contact with the patient
Term
which guideline represents the best approach for examining patients who are mentally impaired
Definition
Assess each patient's ability to follow instructions prior to the exam
Term
which is the most appropriate response if a patient asks about the risks of radiation exposure from a CT exam
Definition
A CT results in a much higher dose than x-ray, but your physician believes the benefits outweigh the risk
Term
which is the most appropriate response to a patient who asks what the term peritonitis means
Definition
peritonitis is an inflammation of the abdomen
Term
which is the best strategy for communicating health care information to a patient who is completely deaf
Definition
call for an interpreter certified in sign language
Term
which guideline is most effective for reducing the number of nosocomial infections
Definition
position urinary catheter bags below the level of the patient's bladder
Term
washing hands with soap and water disrupts the chain of infection by which process
Definition
decreasing the number of pathogens present
Term
which general guideline is the most appropriate for determining when to use standard precautions
Definition
when performing exams on all patients
Term
which condition requires a patient to be placed in a. negative pressure room, and healthcare workers to wear respiratory protection when entering
Definition
TB
Term
which item must be discarded in a biohazard bag
Definition
bed sheet saturated with blood
Term
when transferring a patient with hemiparesis from a wheelchair to the X-ray table, in which position should the wheelchair be placed
Definition
parallel to the x ray table, with the patient's strong side closest to the table
Term
when obtaining a blood pressure reading, systolic and diastolic values are determined by monitoring which pulse point
Definition
brachial
Term
which is the best way to control severe bleeding from a deep laceration of the upper arm
Definition
apply direct pressure to the wound and raise the patient's arm above the level of the heart
Term
which value represents a normal respiratory rate for a pediatric patient
Definition
25 breaths per minute
Term
According to the American heart association guidelines, which is the correct rate of chest compressions when administering CPR to a 6 month old patient
Definition
at least 100 per minute
Term
During a routine radiographic exam, a patient complains of dizziness and appears anxious and diaphoretic. While checking the patient's vital signs, the radiographer notes a rapid heart rate, shaky hands, and clammy skin. Which is the most likely explanation for this presentation
Definition
hypoglycemia
Term
which guideline is recommended for safely lifting a patient from a seated position
Definition
stand with feet apart to establish a wide base of support
Term
which is considered a major contraindication for IVU
Definition
hyersensitivity to contrast media
Term
which describes the proper technique for needle insertion during venipuncture
Definition
insert needle into vein a a 15 degree angle with bevel facing upward
Term
what are the six rights of drug administration that radiographers should follow
Definition
patient, drug, amount, route, documentation, and time
Term
a trauma patient arrives to the emergency department unconscious with tachycardia and hypotension. The patient has lost a significant volume of blood. The patient is experiencing which condition
Definition
hypovolemic shock
Term
a patient is slumped over in his wheelchair and is non responsive. After easing the patient to the floor, the radiographer finds no carotid pulse. This patient is experiencing which condition
Definition
cardiac arrest
Term
during the medical history assessment prior to an UGI, the patient reports he is taking the ACE inhibitor, Vasotec. This suggests that the patient is being treated for which condition
Definition
hypertension
Term
identify the proper medical record documentation administration
Definition
5 mpg/min, Epinephrine, IV, 11/12/2007, 0940
Term
What does "not for parenteral use" warning mean
Definition
it must be administered orally or rectally
Term
place the cursor on the contrast media that should be administered for an IVU
Definition
Isovue 300
Term
what is the minimum recommended filtration for general diagnostic xrays
Definition
2.5 mm Al
Term
in which position should the patient be placed in order to demonstrate the right intervertebral foramina of the cervical spine while minimizing radiation dose to the thyroid gland
Definition
RAO
Term
what is the advantage of using a high kVp, low mAs technique with DR systems
Definition
patient exposure decreases
Term
which fluoroscopic mode results in the lowest patient dose
Definition
digital pulsed progressive
Term
a six year old pediatric patient arrives in the radiology suite for a radiograph of the abdomen. Which set of technical factors proves the best radiation protection
Definition
82 kVp, 7.5 mAs
Term
what is the maximum allowable tabletop intensity in high level control flouro procedures
Definition
20 R/min
Term
A radiographer performs an abdomen exam with a mobile DR system. IN order to reduce the likelihood of a repeat exposure, he decides to increase the technical factors slightly more than necessary. Which term refers to this undesirable practice
Definition
dose creep
Term
which is the required amount of inherent filtration for general purpose x ray tubes
Definition
1.5 mm AL equivalent
Term
According to the FDA, what is the maximum air karma rate for fixed flour units
Definition
10 cGy/min
Term
which types of material are suitable as secondary shielding in the radiology suite
Definition
gypsum board
lead acrylic
concrete
Term
a radiographer stands six feet from the X-ray source when performing a portable chest exam and receives an exposure of 2 mGy. If the radiographer performs a repeat exam using the same technical factors standing 3 feet from the source, how much exposure will be received
Definition
8 mGy
Term
which factors will impact the radiation barrier calculations for an x ray room
Definition
people in adjoining rooms
how often the room is used
types of exams performed in the room
Term
which procedures should imaging personnel perform in order to reduce exposure time during floor procedures
Definition
use the last image hold feature
reset the cumulative timer
use the pulsed progressive mode
Term
which organ has the highest tissue weighting factor
Definition
gonads
Term
which international unit of measurement is used to describe absorbed dose
Definition
Gray
Term
which minimum thickness of lead shielding is required to cover the Bucky slot during fluoro exams
Definition
0.25
Term
which value represents the annual maximum dose limit in mSv for exposure to the extremities in medical imaging personnel
Definition
500 mSv
Term
which measure is used to determine the overall risk of exposure to ionizing radiation
Definition
equivalent dose
Term
which is the maximum allowable exposure to the embryo or fetus each month
Definition
0.5 mSv
Term
a 14 year old female patient arrives in the radiology department for a scoli series. Which option provides both the best image quality and lowest radiation dose for this patient
Definition
employ shadow shields
Term
for which lumbar spine projections should a shaped contact shield be applied to provide protection for the gonads of a male patient
Definition
AP oblique, RPO position
AP
L5-S1 spot
Term
how will the DAP be affected during a 4 Roentgen exposure if the collimated field is reduced from 8x8 to 4x4
Definition
DAP will be half the original
Term
which statement correctly describes the amount of kinetic energy required for a photon to remove an inner shell electron from its orbit
Definition
the same as or greater than the electron binding energy
Term
in the diagnostic energy range, which substances possesses the greatest ability to absorb radiant energy through the process of photoelectric absorption
Definition
bone
Term
which are by products of photoelectric absorption
Definition
photoelectron and characteristic photon
Term
which interaction with matter contributes to the majority of occupational exposure
Definition
Compton scattering
Term
which describes the relationship between LET and RBE (relative biologic effectiveness)
Definition
as LET increases, RBE increases
Term
which describes a linear, non threshold dose response relationship
Definition
no dose may be considered completely safe
Term
which term is an alternate name of the prodromal stage of ARS
Definition
initial stage
Term
which whole body dose most closely approximates the LD 50/30 for humans
Definition
300 rad
Term
at which energy range does photodisintegration occur
Definition
above 10 megaelectron volts MeV
Term
for which purpose is gonadal shielding recommended
Definition
to reduce the probability of genetic mutations
Term
which combination of technical factors is recommended to reduce patient dose
Definition
High kVp and low mAs
Term
what is the primary purpose of beam filtration
Definition
to protect the patient from low energy X-rays
Term
patient dose during Fluor can be minimized by which methods
Definition
use larger diameter modes
use the last image hold feature
restrict beam size
Term
when a pregnant patient must undergo a radiographic procedure, which practices will minimize radiation exposure
Definition
collimate to include only the area of interest
select appropriate exposure factors for the part being imaged
shield the abdomen and pelvis whenever this doesn't interfere with the image
Term
which method should be the first choice to reduce exposure to the reproductive organs in every radiographic exam
Definition
collimate to include only the anatomy of interest
Term
how should the radiology manager schedule a pregnant radiographer
Definition
maintain the employee's same schedule before declaration of pregnancy
Term
how many mm of lead equivalency is recommended for lead aprons worn by pregnant radiographers
Definition
0.5 mm
Term
how should a mobile c-arm fluoroscope be positioned to provide maximum radiation protection to the operator
Definition
with the X-ray tube under the patient and as far from the patient as possible
Term
which factor is applied to scatter and secondary radiation for shielding requirements in X-ray rooms
Definition
1
Term
if all other factors remain constant, how is radiation dose related to SOD
Definition
by the inverse square
Term
over the entire gestational period, which is the fetal exposure limit
Definition
5 rem
Term
place the following types of dosimeters in the proper order from least radiosensitive to most radiosensitive
Definition
film badge
TLD
OSL
pocket ionization chamber
Term
place the following actions in order of greatest to least impact for reducing occupational exposure during fluoroscopy
Definition
stand behind control panel
double distance from x ray source or patient
cut exposure time in half
wear a lead apron
Term
the appendix is connected anatomically to which structure
Definition
Cecum
Term
Which anatomical landmark coincides with the level of the CR entrance point for a PA chest projection
Definition
Inferior border of the scapula
Term
How far should the upper border of the IR extend above the shoulders for a PA chest projection
Definition
1.5 to 2 inches
Term
which body plane is positioned perpendicular to the IR on a lateral chest projection
Definition
Midcoronal plane
Term
How should the CR be angled to compensate for a patient who is unable to assume the erect lordotic position for an AP axial lordotic projection of the chest
Definition
15 to 20 degrees cephalic
Term
where should the CR enter the patient on an AP projection of the chest with the patient in the lateral decubitus position
Definition
Three inches below the jugular notch
Term
How many posterior ribs should be visible above the diaphragm on a PA chest projection
Definition
10
Term
Which method of respiration will demonstrate the maximum number of ribs above the diaphragm when performing an AP projection of the upper ribs
Definition
Suspended deep inspiration
Term
which method of respiration is recommended for a soft tissue neck exam to evaluate the trachea
Definition
Suspended inspiration
Term
Where should the CR be directed for a lateral lumbosacral spine projection when using a 14x17 IR
Definition
Iliac crest
Term
Which lumbar spine structures are best demonstrated with the patient in a 45 degree LPO position
Definition
The left zygapophyseal joints
Term
where should the CR enter the patient for a lateral sacrum projection
Definition
3-4 inches posterior to the ASIS
Term
A PA axial projection of the coccyx is performed because the patient is unable to tolerate the supine position due to injuries sustained after falling backward. How should the CR be adjusted for this projection
Definition
10 degrees cephalic
Term
How should the radiographer rotate the patient's lower leg and foot for an AP oblique projection of the second toe
Definition
30-45 degrees medially
Term
Which x ray tube orientation is used to create a 90 degree angle between the CR and the metatarsals for an AP axial projection of the foot
Definition
10 degrees posteriorly
Term
Which tarsal bone is best seen when the plantar surface of the foot is positioned perpendicular to the IR and a 40 degree cephalic CR is directed to the base of the third metatarsal
Definition
Calcaneus
Term
which bones make up the ankle mortise
Definition
Tibia, fibula and talus
Term
In which position is the knee placed in order to demonstrate the head of the fibula without superimposition
Definition
45 degrees medial rotation
Term
what is the correct CR location for an AP knee projection
Definition
1/2 inch below the apex of the patella
Term
The Holmblad method is performed to demonstrate which radiographic appearance
Definition
open intercondylar fossa
Term
Which is the correct CR location for a PA hand projection
Definition
Third metacarpophalangeal (MCP) joint
Term
How are the patient's hand and fingers positioned for a PA wrist projection
Definition
Hand pronated with fingers flexed
Term
Which radiographic appearance results when the anterior surface of the patient's elbow is rotated 45 degrees medially for an AP elbow projection
Definition
The coronoid process is seen in profile
Term
Which appearance is demonstrated by a lateral projection of the shoulder obtained using the Lawrence method
Definition
The proximal humerus is projected through the lung field
Term
An AP shoulder image acquired with the epicondyles perpendicular to the IR will demonstrate which radiographic appearance
Definition
The lesser tubercle is seen in profile medially
Term
The Alexander method is performed to demonstrate dislocation of which joint
Definition
Acromioclavicular
Term
For which purpose is orthoroengenography performed
Definition
Long bone measurement
Term
Which wrist projection best demonstrates a Colles' fracture
Definition
Lateral wrist
Term
Which describes the appearance of a PA axial projection of the skull using the Caldwell method
Definition
Petrous pyramids are demonstrated in the lower third of the orbit
Term
Which CR orientation is recommended for a standard AP axial projection of the full to demonstrate the dorm sell within the foramen magnum
Definition
30 degrees to the OML
Term
Which skull positioning line is situated perpendicular to the IR when performing a parietoacanthial projection (Waters method) of the facial bones
Definition
MML
Term
Beginning with the patient's head in true lateral position, which positioning method is recommended
for demonstrating the mandibular body without foreshortening on an axiolateral oblique projection of the mandible
Definition
Rotate the patient's head 30 degrees toward the IR
Term
Which statement most accurately describes the position of the kidneys within the abdominal cavity of an average patient
Definition
The left kidney is positioned slightly higher than the right kidney
Term
If a radiographic image is requested to show the nephrogram phase of an IVU, how long after IV contrast administration should this image be obtained
Definition
30 seconds to 1 minute
Term
Which is the correct CR location for an AP oblique projection of the urinary bladder during a cystogram
Definition
2 inches superior to the pubic symphysis and 2 inches medial to the elevated ASIS
Term
An exam of the right SI joint was performed by placing the patient in a 30 degree LPO position with the CR directed 1 inch medial to the left ASIS. The resulting image demonstrates a closed right SI joint space. Which is the most likely explanation for this appearance
Definition
The CR was directed to the wrong ASIS
Term
Which radiographic finding is characteristic of cervical spine trauma resulting in a Jefferson fracture
Definition
Open mouth view demonstrates bilateral displacement of the lateral masses of C1
Term
Which alternative procedure is recommended when positioning a patient for a Swimmer's lateral (Twining method) of the cervicothoracic region (C7-T1) if the shoulder away from the IR cannot be fully depressed
Definition
Angle the CR 3-5 degrees caudal
Term
Which structure is demonstrated without superimposition on a properly positioned medial oblique foot image
Definition
Cuboid
Term
Which position/projection of the elbow best demonstrates the trochlear notch of the ulna
Definition
Lateral, lateromedial projection
Term
Which positioning procedure is performed to demonstrate the right intervertebral foramina of the cervical spine
Definition
AP projection, 45 degree LPO position
Term
An AP pelvis image shows evidence that the patient is rotated toward the right hip. Which statement below best describes the appearance of the image
Definition
Right iliac wing appears larger than the left iliac wing
Term
At which location is the CR directed for an AP projection of the thoracic spine
Definition
Midway between the sternal notch and the xiphoid process
Term
After contrast has been administered in to the hip joint during hip orthography, what should the patient do
Definition
Exercise the joint to allow the contrast to completely fill the joint space
Term
Which portion of the small intestine is most commonly affected by Chron's disease
Definition
Ileum
Term
Which finding is demonstrated most clearly by a left lateral decubitus image of the abdomen
Definition
Free air over the liver
Term
In which position should the patient be placed for insertion of the enema tip during a barium enema procedure
Definition
Sims
Term
In which exam is contrast introduced in to the area of interest in a retrograde fashion
Definition
ERCP
Term
Why is a cross table lateral preferred over a recumbent left lateral when obtaining images for a myelogram
Definition
Contrast may move out of the area of interest when rolling into the lateral position
Term
What should be demonstrated on a properly exposed supine image of the abdomen
Definition
Perirenal fat
Term
which type of pathology is defined as inflammation of an outpouching of the colon
Definition
Diverticulitis
Term
The RPO chest position may be used instead of the LAP position to demonstrate the heart and great vessels. How will using the RPO position affect the appearance of these structures
Definition
The left lung appears shorter than the right
Term
Place the parts of the respiratory tract in order from the most proximal to the most distal
Definition
Trachea
Primary bronchi
Bronchioles
Alveolar sacs
Term
Based on the appearance of the image, in which position was the patient placed for this post fluoroscopy image
Definition
RAO[image]
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