Registry Flashcards
(303 cards)
1
Q
when acquiring a lateral projection of the finger it is important to keep the finger parallel tot he image receptor because in this position
a. the joint spaces are perpendicular to the image receptor and open on the resulting image
b. the joint spaces are parallel to the image receptor and open on the resulting image
c. elongation of the phalanx enables an unobstructed view of a fracture
d. foreshortening of the phalanx enables an unobstructed view of a fractre
A
a
2
Q
what type of radiographic study is used to evaluate skeletal maturity
A
bone age
3
Q
The ___ sphincter prevents reflux of stomach contents into the esophagus
A
cardiac
4
Q
The best reason to use touch for emphasis when performing a radiologic exam is to
A
specify instructions or location
5
Q
which is a primary barrier?
a. lead apron
b. lead gloves
c. exposure room door
d. control booth window
A
exposure room door
6
Q
The outer portion of the double-walled sac in the abdominal cavity is call the
A
parietal peritoneum
7
Q
a 25 guage, 0.5 inch needle is best used for ___ injection
A
subcutaneous
8
Q
the anatomic stuffbox overlies the ___ bone and the radial artery
A
scaphoid
9
Q
the rationale behind the development of AEC is?
a. decrease the need for technique charts
b. make the technologist more of a button pusher
c. reduce repeats and improve image quality
d. increase productivity and patient dose
A
reduce repeats and improve image quality
10
Q
The letter “U” as an abbreviation can be mistaken for
A
0
11
Q
The ICRP dose equivalent limit for the hands is ____ mSv
A
500
12
Q
The ejection of an electron from an atom or molecule is known as
A
ionization
13
Q
an image that has many shades of gray with few differences among them is defined as exhibiting
a. high spatial resolution
b. low contrast
c. high dynamic range
d. low bit depth
A
low contrast
14
Q
The ___ sinuses sits directly beneath the sella turcica
A
sphenoidal
15
Q
the process of electrons boiling off the filament is referred to as
A
thermionic emission
16
Q
which if the following is a cranial bone
a. mandible
b. parietal
c. vomer
d. maxillary
A
parietal
17
Q
leakage radiation in the radiogrphy/fluoroscopy exposure room is emitted from the
A
x-ray tube housing
18
Q
the junction between the coronal and sagittal sutures of the skull is called the
A
bregma
19
Q
irradiation of the embryo during the first week of development to equivalent doses exceeding 200 mSv frequenatly results in
A
death
20
Q
which type of communication includes eye contact, touch and tone of voice
A
nonverbal
21
Q
the act of ___ is observed on fluoroscopy during an esophagram
A
deglutition
22
Q
if 90 kVp is used with a single phase generator, the minimum electron voltage across the tube is ___ keV
A
0
23
Q
which of the following is a guideline used to reduce personnel and patient dose during fixed fluoroscopy
a. 30 roentgens r/min max tabletop exposure rate
b. 15-inch min SSD
c. min filtration of 1/5mm Al equivalent
d. 0.5 mm primary protective barrier
A
15” min SSD
24
Q
the ____ pleura closely adheres to the surface of the lung
A
visceral
25
which is not true concerning operator console
a. they contain an exposure button
b. consoles allow for focal spot size selection
c. consoles are supplied with high voltage
d. they display AEC settings
consoles are supplied with high voltage
26
exposure of an embryo or fetus to the radiation from ____ to ___ can result in congenital abnormalities
10 days to 6 weeks
27
x-ray tubes are operated at or above ___ kvp to avoid being space charge limited
40
28
what type of device is the mA selector
rheostat
29
children have epiphyseal plates made of ___ that can be evaluated as part of normal chronologic age for bone age analysis
hyaline cartilage
30
the quality of x-ray photons is affected by
kvp
31
all of the following except ___ will result in an increase in AEC response time
a. decreasing kvp
b. increasing the focal spot size
c. increasing the part thickness
d. increasing the SID
increasing the focal spot size
32
the device that permits the flow of electrons in one direction only is the
rectifier
33
what medium is injected into the joint of a patient undergoing positive single contrast radiographic arthrography
water soluble iodinated contrast
34
the primary function of filtration is to reduce
patient skin dose
35
technologists should rotate a patient how many degreese for an AP axial oblique c-spine
45 degrees
36
the 3 projections taken for a long bone measurement (scanography technique) of the lower extremity include
ap hip
ap knee
ap ankle
37
combining 2 hydroxyl radicals (OH) will form
H2O2
38
when the x-ray beam is NOT properly aligned with the grid stips the ___ is changed
receptor exposure
39
the typical flow rate for drip infusion drug administration is __ drops per min
10-20
40
genetic defects and cancer are examples of ___ effects
stochastic
41
the ____ receives electrons immediately after they are read out from an imaging detector
analog-to digital converter
42
the positive side of the x-ray tube is known as the ___
anode
43
the AEC controls which exposure variable
seconds
44
decreasing the detector element size will affect what
spatial resolution
45
what components make up the induction motor in an imaging system
rotor and stators
46
NCRP states annual occupational exposure to the lens of the eye should not exceed
150 mSv
47
when electrons move through a conductor ___ is said to flow
current
48
when positioning a patient for an AP open mouth the ___ plane/lines should be perpendicular to the image receptor
occlusal
49
select the true answer as it relates to nonstochastic (deterministic effect)
a. a response is known to occur
b. no threshold dose exists
c. the effect of radiation is unrelated to the dose
d. the effect does not follow any type of dose response curve
a response is known to occur
50
the ___ is an automatic exposure device that uses a gas-filled contain
ionization chamber
51
the ___ grid design is manufactured to match the divergence of the x-ray beam
focused
52
primary radiation barriers must be at least how many feet tall
7
53
using 75 kvp x-ray beam with a 0.25 mm lead equivalent apron provides protection from ___ of the beam
66%
54
what is the best projection to demonstrate the intervertebral foramina of the cervical spine
AP/PA axial oblique
55
a patient is injected with a large volume of fluid intravenously called
bolus
56
when discussing the grid, the letter "k" represents the
contrast improvement factor
57
which of the following is considered a late nonstochastic effect
a. fibrosis
b. cancer
c. birth defect
d. increase fertility
fibrosis
58
which best demonstrates the intervertebral foramina of the thoracic spine
lateral
59
all affect the spatial resolution except
a. kvp
b. part size
c. tube angle
d. SID
kvp
60
the angle of the anode in the region of the target has a variation of ___ to __ degrees
7 to 20
61
what is designed to eliminate unnecessary radiation exposure to the patient
filtration
62
what structures are located in the mediastinum
trachea and thymus
63
The speed at which the anode rotates in the rotating anode x-ray tube can be
a . 3000 rpm
b. 10000 rpm
c. 15000 rpm
3000 and 10000
64
which of the following parts is not part of a needle
a. cannula
b. hub
c. bevel
d. plunger
plunger
65
what indicates not tilt on a projection of the chest
T4 superimposed on the manubrium
66
a radiograph demonstrates acceptable brightness in the middle of the image but shows gradually increasing brightness bilaterally further from the center which is a ____ error
upside down focus grid
67
the portion of the anode that stops the stream of e- during x-ray production is the
target
68
the protective booth that the radiographer stands behind when making the x-ray exposures is a ___ barrier
secondary
69
an air gap technique can be used in place of a grid in some instances because of
beam divergence
70
which of the following affects subject contrast
a. grids
b. OID
c. mAs
d. filtration
filtration
71
a patient develops erythema in the shape of the exposure field following an IR procedure. the legal doctrine most relevant to this injury would be
res ipsa loquitur
72
how many phalanges are located in the foot
14
73
radiodermatitis is a local tissue effect of the __ system
integumentary
74
high LET has a ___ RBE
high
75
while performing intravenous drug injections, it is necessary to decrease the angle of the needle once a flashback is seen in the intravenous catheter to
avoid passing through the vein
76
the device that is responsible for producing the high voltage necessary for x-ray production is the
transformer
77
a benign tumor arising from schwann cells of the eighth cranial nerve
acoustic neuroma
78
The AP axial projection of the c spine must demonstrate what levels
C3-T2
79
according to government regulations the xray beam must be withing ____ degrees of perpendicular
1
80
for a PA projection of the chest, the central ray is adjusted parallel to ___ and enters at the level of ____
midsagittal plane
| T7
81
all of the following affect pt dose except for
a. inherent filtration
b. added filtration
c. SID
d. focal spot size
focal spot size
82
a fracture at the base of the 1st metacarpal is a
bennett
83
current that flow in only one direction is called ___ current
direct
84
the ____ xray interaction is most common in the human body
compton
85
a ___ is used to assess display monitors
society of motion picture and television engineers (SMPTE) test pattern
86
the central ray enters the _____ when performing an AP axial projection of the toes
3rd metatarsophlangeal joint
87
the sampling frequency of an imaging system determines the
pixel size
88
the active layer of a direct flat panel detector converts
x-rays to electrons
89
which imaging informatics system is a communication network of computers for image acquisition, display, and storage
picture archiving and communications system PACS
90
increase the kvp from 70 to 80 will result in an increase of the _____ of ___ photons
quality
| characteristic
91
which projection of the chest is used to differentiate the lobes of the lungs, demonstrate the interlobar fissures, and localize pulmonary lesions
lateral
92
all are quality control tests for photostimulable imaging detectors except for
uniformity
spatial resolution
luminance
erasure thoroughness
luminance
93
the kidneys are located in what department
retroperitoneum
94
what might cause an increase in quantum mottle
- increasing the mas
- decreasing the field size
- increasing the filament size
- decreasing the grid ratio
decreasing the field size
95
what has the highest specificity for indicating nonaccidental trauma in pediatric patients
posterior rib fractures at different stages of healing
96
which image display monitor works by accelerating electrons towards a fluorescent screen
cathode ray tube
97
during the ____ stage of gestation prenatal death can result from exposure to ionizing radiation
preimplantation
98
all of the following affect tube output except
- focal spot size
- target material
- filtration
- kvp
focal spot size
99
a malignant tumor in the bone is a
osteosarcoma
100
put the circuitry sequence from incoming voltage in a high frequency generator
rectifier, capacitor, inverter, transformer, rectifier, capacitor
101
an increase in ____ will decrease image contrast
kvp
102
a malignant primary tumor of bone is a
osteosarcoma
103
a radiograph that demonstrates acceptable brightness along one side of the image but not on the opposite side represents a ___ error
off level grid
104
subject contrast is affected by
- mas
- barium
- OID
- all of the above
barium
105
the temporal mandibular joint (TMJ) is a ___ joint
synovial hinge and gliding
106
an increase in the difference between the atomic numbers or densities of adjacent tissues results in increased
subject contrast
107
the purpose of the rheostat in the x-ray circuitry is to
adjust filament temperature
108
the bony structure in which the pituitary sits is the __ which is in the ____ bone
sella turcica; sphenoid
109
a malignant tumor arising from cartilage cells is a
chondrosarcoma
110
for a lateral projection of the cranium, the ___line is perpendicular to the front edge of the image receptor
infraorbitomeatal line IOML
111
most cell damage from ionzing radiation occurs when xrays interact with
water molecules
112
filtration affects the primary beam by
increasing the average energy of the primary beam
113
the most common subcutaneous sites for drug injection are the
abdomen and outer thighs
114
the anode heel effect is most prevalent with a ____ SID and ___ Receptor size
short
| large
115
the misrepresentation of the size and shape of an object is referred to as
distortion
116
when H2O gains an electron making it become
HOH-
117
a benign tumor consisting of cartilage is a
enchondroma
118
which of the following is not an advantage of beam restriction?
- reduced scatter radiation production
- need to irradiate less biologic material
- need for less total filtration
- improved image contrast
need for less total filtration
119
what component is commonly replacing the vidicon camera found in older fluoro units
CCD
120
an increase in image contrast will result from increasing which of the following
- OID
- SID
- kvp
- focal spot size
OID
121
which bones are part of the orbit
palatine
lacrimal
maxilla
122
the ap axial oblique projections of the c spien demonstrate the ____ that are ___ the image receptor
intervertebral foramina
| farthest from
123
medical imaging order entry and scheduling of imaging visits occur in the
RIS
124
the air gap technique uses a ___ SID and ___ OID
long and long
125
the prolapse of one part of the gastrointestinal tract into the lumen of an adjacent part of the GI tract is known as
intussusception
126
generally speaking, the dose to staff standing 1 meter from the patient is ___ of the incident exposure
1/1000
127
the potential difference in a circuit of 20 amperes and 10 ohms is ___ volts
200
128
the minimum lead equivalent requirement for gonadal shielding is
0.25
129
the auricular surface of the ilium articulates with the
sacrum
130
the optic nerve passes into the orbit through the
optic foramen
131
___ is the software function that enhances contrast along the boundaries of tstructure
edge enhancement
132
the basic difference between the sievert and other units that measure radioactivity is that it is
used only for radiation protection purposes
133
for a SMV, the ____ line should be parallel with the image receptor
IOML
134
the lumbar spine has a normal curve that is ___ which is considered a __ curve
lordotic; secondary (compensatory)
135
the average oxygen delivery rate via nasal cannula
1-6 L/min
136
what is hypervolemia
excess fluid in the blood
137
as image compression ratio increase :
image quality degrades
138
increasing SID ___ spatial resolution
increases
139
The HVL fora 90 kvp beam is ___ mm of AL
2.5
140
the dimension from one side of a pixel to the other side of the same pixel is the measure of
pixel size
141
a barium enema bag usually is hung no higher than ___ above the patients rectum
24"
142
the live has a WT of
.05
143
when a patient is in a 45 degree LAO position what lung is best displayed
right
144
contrast resolution increases from an increase in
bit depth
145
which is true
- radiation causes an increase in the number of mature blood cells
- most re blood cells are manufactured in the lymph nodes
- higher radiation doses to bone marrow increase blood cell depletion
- lymphocytes have the longest life span of all blood cell types
higher radiation doses to bone marrow increase blood cell depletion
146
one of the fuctions of the stomach is to
break down food
147
what transformer works based upon mutual induction
autotransformer
148
the first __ ribs are called true ribs
7
149
which are considered moderate reactions to iodinated CM
- N/V
- wheezing
- pronounced skin reactions
2 and 3
150
what characteristic xrays are useful for image production
k-shell
151
the ___ the bit depth the greater the contrast resolution
higher
152
a surgical opening in the trachea to provide a temporary or permanent artificial airway
tracheostomy
153
which DQE measurement identifies an image receptor with the greatest efficiency
0.9
154
the ability of a system to record detail
spatial resolution
155
a technologist acquires an image without a primary beam restrictor and then repeats the image using the device . to maintain the exposure to the IR what must be modified
increase technique
156
kVp is selected at the
autotransformer
157
the fluoro feature that maintains the signal to noise ration is abbreviated as
AERC
158
an increase in image magnification will result from increasing
OID
159
adjusting your mood to a patients is considered
emotional intelligence
160
the ___ is the portion fo the x-ray tube that possesses a negative charge and aligns the flow of electrons from the cathode to the anode in the xray tube
focusing cup
161
an increase in collimation in fluor decreases what two factors
integral dose
| scatter production
162
a detector used for direct capture in digital radiography is made of
amorphous selenium
163
the unit measure for collective effective dose is
person-sievert
164
what is the angle for a inlet projection
40 degree caudal
165
the data contained in a digital image is ___ data
numerical
166
beam quantity relates to
primary beam photon number
167
a DAP meter does not use ___ to measure dose
distance
168
PA axial of the mandibular rami, the ___ line should be perpendicular to the image receptor for accurate flexion
OML
169
the exposure field size and image receptor size selected must be within __ of the SID
2%
170
charge created in the amorphous silicon layer is collected at the
capacitor
171
The joint commision and HFAP are organizations that
certify health care facilities in the US
172
the minimum lead equivalent for a thyroid shield
.50 mm
173
the _____ is the portion of the rotating anode xray tube that does not move
stator
174
an impacted fracture of the posterolateral aspect of the humeral head
hill sachs lesion
175
when an exposure is made using 69 kbp, ___ of the primary beam consists of characteristic xrays
0
176
the ____ and the ___ form the zygapophyseal joints of the thoracic spine
superior articular process
| inferior articular process
177
projectile electrons are focused on the ___ for xray production to take place
actual focal spot
178
bilateral acromioclavicular joints are done at what SID
72"
179
True or False
| the radiographer should insert the catheter tip into the patients stoma
false
180
epistaxis is a medical term for
nosebleed
181
another name for the calcaneus
os calcis
182
the ___ foramina house the spinal cord
vertebral
183
what will optimize patient exposure during a fluor procedure
minimizing distance between image intensifier and patient
184
the outer layer of the input phosphor is used to
maintain a vacuum
185
the central ray enterance point for a grashey is
2 in medial and 2 inc inferior to superolateral border of the scapula
186
the decreased brightness along the periphery of an image that occurs when sing image intensified fluro is
vignetting
187
the _____ is a collection of disc drives that perform together as a signle unit and improve reliability of data storage
redundant array of independent disks (RAID)
188
base layer of a flat panel detector is made of
glass
189
most superior portion of the stomach
fundus
190
mA is selected at the
rheostat
191
increasing SID ___ distortion
decreases
192
contrast resolution of a CR/DR image is determined by the ___ of the system
bit depth
193
to demonstrate the ZP joint of the thoracic vertebrae, a radiographer should place the patient in a ____ position
70 degree oblique
194
beam quality relates to
penetrating power of the primary beam
195
the radiographer can best control the production of scatter by
reducing field size
196
what is likely to result in changes in teh DNA of circulating lymphocytes
cardiac catheterization
197
all are located in the secondary xray circuit except
- rectifier
- anode
- filaments
- stators
filament
198
the unit of measurement for absorbed dose is the
gray
199
which urography exam demonstrates the physiologic function of the urinary system
intravenous urography
200
the right kidney is place perpendicular to the image receptor in the ___ position
RPO
201
____ are used to reduce the effect of scatter radiation
grids
202
patient exposure can be reduced by using the highest
kvp
203
assessing an image for visible differences between 2 selected areas of brightness mean that the radiographer is evaluating the images
contrast
204
the total of ___ dots on the receptor is the proper number during a spinning top test of a single phase fully rectified generator at .10 seconds
12
205
the AP oblique projection of the ribs with the patient in the RPO best shows the __ portion of the ribs
right axillary
206
all are used to calculate cumulative air kerma except
- kvp
- focal spot size
- mA
- exposure time
focal spot size
207
typical grid ratios found in fluoro units are
6:1 to 10:1
208
the formula 2n represents
bit depth
209
a patient is rotated ___ for contrast urography oblique positions
30 degrees
210
inpatient billing, diagnostic report generation, imaging order entry and scheduling of all diagnostic service visits occur in the
HIS
211
the femoral head articulates with the ___ of the hip bone
acetabulum
212
when using magnification mode during fluoro exposure ____ and spatial resolution ___
increases
| increases
213
exposure of an embryo or fetus to radiation from ___ is most likely to result in a skeletal abnormality
3 weeks - 20 weeks
214
the ____ tendon inserts on the lesser tubercle of the humerus
subscapularis
215
the measurement of the half value layer of the beam is an assessment of
filtration
216
____ doesnt affect x-ray attenuation
mA
217
AP oblique images of the chest can be used when a patient is too ill for upright or prone positioning . when the patient is in a 45 RPO the ____ _____ is best displayed
right lung
218
average lifespan of an erythrocyte is ___ days
120
219
the central ray is angled ___ in a ___ direction for the ap axial projection (ferguson method) of the lumbosacral junction
30 to 35 cephalad
220
the total electrical charge generated by an x-ray beam per unit mass of air is called
exposure
221
beam penetrability is affected by
filtration
222
for the RAO during upper GI exam how much should the pt be rotated
40 to 70
223
what is not a component of the ARRT standards
practice standards
224
for the lateral projection of the orbit, the central ray is perpendicular to the image receptor and enters
at the outer canthas
225
when performing the Rafert-Long method scaphoid series the radiographer positions the patients wrist in extreme ulnar deviation and acquires a series of ___ PA and PA axial images
4
226
scatter production is affected by
filtration
227
if an individual receives an acute, high dose of radiation to the forearm what is the correct order in which these occur
erythema, epilation, desquamation
228
pt with a measurement of 18 cm what ankle for a knee
3-5 caudad
229
____ dose is the sum of the individual doses received in a given period by a specific population from exposure to a specified source of radiation
collective effect
230
leakage radiation is
monoenergetic
231
a negative charge is applied to the ___ to minimize electrostatic repulsion
focusing cup
232
The ICRP dose equivalent limit for the skin in ___ msv
500
233
the ratio of a pixels total size to its actual collection area is known as the
fill factor
234
the effective focal spot size is affected by the ___ angle
target
235
for a lateral projections of the humerus, it is necessary to have the coronal plane passing through the humeral epicondyles aligned
perpendicular
236
the ___ dose reponse model best represents the basis for radiation protection guidelines
linear, nonthreshold
237
the portion of the light localizing collimator that reduces off-focus radiation striking the patient is the
shutter closest to the tube port
238
the _____ risk model predicts that excess cancer deaths from irradiation will increase over time as teh naturally occurring risk increase with age in the nonirradiated
relative
239
for conventional fluoro the light intensities must be converted by the ___ to be viewed on a tv monitor
CCD
240
___ is the local processing function of renumbering pixel values for an entire image domain
windowing
241
during a barium enema exam the enema tip should be inserted in the _____ direction initially and while the patient is ____
anterior
| exhaling
242
______ is a short term somatic effect of radiation exposure
skin erythema
243
the concept used in barrier design that describes the total beam on time for a radiography room per week is
workload
244
SID and focal spot size affect what
spatial resolution
245
patient demographics and examination information are stored with a digital radiography image in the images what
metadata
246
For an AP projection of the humerus, it is necessary to haev the coronal plane passing through the humeral epicondyles aligned ___ to the IR
parallel
247
until a photostimulable phosphore plate (PSP) is processed, electrons freed upon irradiation are stored in the
conduction band
248
the photomultipler tueb in a phosphor plate reader system converts ___ to ___
light to electrons
249
increasing kvp from 60 to 68 will result in
increased quantity of bremsstrahlung photons
250
the selection of a small focal spot size helps to
increase spatial resolution
251
the greatest source of medial radiation exposure in the US is
CT
252
blood vessels, the ureters, nerves, and lymphatic vessels enter and exit the kidney through the
hilum
253
the advantage of the dose area product meter as a dose measuring device is
technologists do not have to place it into the field
254
modern AEC sensors are of the ___ type
ionization chamber
255
___ is the primary cause of decreased spatial resolution
patient motion
256
The feature that maintains image quality at the lowest dose in fluoro is abbreviated
AERC
257
for a lateral projection of the knee the patients leg is flexed how many degrees
20-30
258
the neck of the femur is angled anteriorly from the femoral body by how many degrees
15-20
259
a small bowel series on a patient with normal intestinal motility usually is completed in what time frame
2 hrs
260
which type of urography involves a urologist catheterizing the ureters and instilling a water soluble iodinated contrast medium
retrograde urogrpahy
261
how does an increase in kvp affect the kev of the characterisitc interaction
increaseing does not affect the kev interaction
262
for optimum image of the right kidney during urogrpahy what position should a patient be in
LPO
263
the need for ___ is at the top of maslows hierarchy of needs
self actualization
264
the unit of measure for display monitor luminance is
Cd/m2
265
all techniques and procedures designed to reduce occupational dose during fluoro except
- intermittent activation of views
- optimizing dose rates using AEC
- remote controlled fluoro
- high level control fluoro
high level control
266
during a mobile exam the radiographer will receive the least amount of scatter radiation when standing at what angle to the pt
90
267
a typical cervical vertebra will have a spinous process that
has a bifid tip
268
the __ of the thoracic vertebrae articulate with the heads of the ribs
bodies
269
charges separate in amorphous silicon when
an electric field is applied to the array
270
defecography is used to measure and study the
anorectal angle
271
which cranial bone is also part of the orbit
ethmoid
272
an acceptable image is produced using a set of exposure parameters. The image is repeated using the air gap technique what will not decrease
- sharpness
- receptor exposure
- contrast
- spatial resolution
contrast
273
the fluro foot switch is a
positive pressure switch
274
the tangentional projection or gaynor hart method of the wrist evaluates
carpal canal
275
the average temporal artery temperature for a patient is
100 degrees
276
the voltage ripple of a high-frequency genterator is
<1%
277
GFR is not calculated by the results of
blood urea nitrogen
278
kinetic energy transferred is best described as
air kerma
279
there must be a ____ for current to flow
voltage
280
the atlantoaxial joint between the dens of the axis and the anterior arch of the atlas is a ___ joint
pivot
281
which will not affect the effective focal spot size
- filament size
- anode angle
- target material
- actual focal spot size
target material
282
what lung is best visualized in an LPO projection
left lung
283
for a given dose of radiation which radiation type wil yield the highest equivalent dose
alpha particles
284
True of false
| xrays have mass
false
285
true of false
| xrays are electrically neutral
true
286
the min lead equivalent for lead gloves is
0.25mm
287
___ scattering is another term for classical scattering
coherent
288
what is a type of primary shieldign
collimation
289
the central ray enters the ___ during an axial plantodorsal projection of the calcaneus
base of the third metatarsal
290
the ____ detector consists of a thin-film transistor array
flat panel
291
The formula Ei = Es + (Eb + EKE) is for calculating the energy of a scattered photon created during a(n) ________ scattering interaction
compton
292
The kinetic energy deposited per unit mass of air from an x-ray beam is measured by:
air kerma
293
While reviewing a posteroanterior (PA) chest radiograph of a 72-year-old male patient, the radiographer notices that the image does NOT show the right heart border because the right middle lobe is consolidated. This is described as the ________ sign.
silhouette
294
Decreasing the kVp will ________ receptor exposure and ________ contrast.
decrease
| increase
295
The ________ generator component converts DC current to high-frequency AC
inverter
296
________ is the MOST important factor in controlling size distortion
OID
297
For a submentovertical projection of the zygomatic arches, the central ray is perpendicular to the infraorbitomeatal line (IOML) and enters the throat at
a level 1 inch posterior to the outer canthus
298
The negative side of the x-ray tube is known as the:
cathode
299
On a PA axial projection of the mandibular rami, the central ray is angled 20° in a _________ direction and should exit the ________.
cephalic; acanthion
300
What type of contrast medium dissociates into 2 molecular particles in water?
ionic agents
301
A(n) ________ is MOST helpful in demonstrating suspected vesicoureteral reflux.
voiding cystourethrogram
302
The rotating anode target material that is responsible for helping to cool and conduct electrons through the x-ray circuitry is comprised of how many materials from the list below?
```
tungsten
thorium
rhenium
molybdenum
graphite
```
4
303
The spatial resolution of a detector is controlled by the:
sampling frequency
