The target material in the anode is typically made of:
A
Lead
B
Tungsten
C
Copper
D
Aluminum
Question 4Single Answer
What controls the energy (quality) of the X-ray beam?
A
Tube current (mA)
B
Tube voltage (kVp)
C
Filtration
D
Exposure time
Question 5Single Answer
What determines the number (quantity) of X-rays produced?
A
mA and exposure time
B
Filtration
C
Collimation
D
kVp
Question 6Single Answer
The term "bremsstrahlung" refers to:
A
Characteristic X-rays
B
Scattering of X-rays
C
X-rays produced when electrons decelerate upon interacting with the nucleus
D
Heat generation in the X-ray tube
Question 7Single Answer
Characteristic X-rays are produced when:
A
Electrons are deflected by the nucleus
B
Electrons transition between inner atomic shells
C
Scattered X-rays exit the patient
D
The anode spins
Question 8Single Answer
The efficiency of X-ray production in an X-ray tube is approximately:
A
1%
B
50%
C
99%
D
25%
Question 9Single Answer
The heel effect results in:
A
Uniform X-ray intensity
B
Higher intensity on the cathode side
C
Higher intensity on the anode side
D
Reduced X-ray production
Question 10Single Answer
Which factor reduces the heat load on the anode?
A
Increasing kVp
B
Using a rotating anode
C
Increasing mA
D
Prolonging exposure time
Question 11Single Answer
Which interaction predominates at lower X-ray energies?
A
Compton scattering
B
Photoelectric effect
C
Pair production
D
Coherent scattering
Question 12Single Answer
The photoelectric effect is more likely to occur in:
A
Low atomic number materials
B
High atomic number materials
C
Air
D
Fatty tissues
Question 13Single Answer
Compton scattering primarily affects:
A
Image contrast
B
Patient dose
C
Radiation protection
D
All of the above
Question 14Single Answer
Pair production occurs when the photon energy exceeds:
A
1.02 MeV
B
10 keV
C
100 keV
D
0.5 MeV
Question 15Single Answer
What interaction dominates in diagnostic radiology (20-150 keV range)?
A
Coherent scattering
B
Pair production
C
Photoelectric effect and Compton scattering
D
Bremsstrahlung
Question 16Single Answer
Tissue contrast in an X-ray image depends on:
A
kVp settings
B
Photoelectric absorption differences
C
Tissue density and atomic number
D
All of the above
Question 17Single Answer
Which factor increases Compton scattering?
A
Lower kVp
B
High tissue density
C
Low tissue atomic number
D
Shorter exposure time
Question 18Single Answer
High atomic number materials are used for radiographic contrast because they:
A
Scatter X-rays
B
Absorb X-rays via the photoelectric effect
C
Reflect X-rays
D
Generate characteristic radiation
Question 19Single Answer
Air appears dark on an X-ray image because:
A
It scatters all X-rays
B
It absorbs most X-rays
C
It allows most X-rays to pass through
D
It interacts via pair production
Question 20Single Answer
Grid use in X-ray imaging reduces:
A
Patient dose
B
Compton scatter reaching the detector
C
Image contrast
D
Radiation intensity
Question 21Single Answer
Increasing kVp results in:
A
Increased photoelectric absorption
B
Reduced image contrast
C
Increased patient dose
D
Reduced beam penetration
Question 22Single Answer
Contrast agents like iodine are used to enhance:
A
X-ray beam intensity
B
X-ray tube efficiency
C
Visibility of low-contrast tissues
D
Patient comfort
Question 23Single Answer
A high contrast X-ray image requires:
A
High kVp and low mA
B
Low kVp and high mA
C
Low filtration
D
High grid ratio
Question 24Single Answer
Reducing the focal spot size in the X-ray tube improves:
A
Heat tolerance
B
Image sharpness
C
Beam penetration
D
Patient dose
Question 25Single Answer
The main purpose of filtration in X-ray machines is to:
A
Increase patient dose
B
Harden the X-ray beam by removing low-energy photons
C
Improve image contrast
D
Reduce exposure time
Question 26Single Answer
What is the effect of increasing the distance between the X-ray tube and the patient?
A
Increases magnification
B
Reduces patient dose
C
Increases beam divergence
D
Decreases image resolution
Question 27Single Answer
The inverse square law in radiography states that:
A
Radiation intensity is inversely proportional to the square of the distance from the source
B
Radiation intensity is inversely proportional to the distance
C
Image contrast decreases with increased distance
D
Beam quality decreases with increased distance
Question 28Single Answer
Collimators are used in radiography to:
A
Increase beam intensity
B
Improve image resolution
C
Restrict the X-ray beam to the area of interest
D
Increase scatter radiation
Question 29Single Answer
The spatial resolution of an X-ray image depends on:
A
The focal spot size
B
Detector resolution
C
The distance between the source, object, and detector
D
All of the above
Question 30Single Answer
Motion artifacts in X-ray images can be minimized by:
A
Increasing mA
B
Increasing exposure time
C
Using shorter exposure times
D
Increasing the distance between the patient and the detector
Question 31Single Answer
The primary reason for using lead aprons in radiography is to:
A
Reduce image contrast
B
Absorb scattered radiation and protect personnel
C
Increase patient dose
D
Enhance beam collimation
Question 32Single Answer
Occupational radiation exposure is most effectively monitored using:
A
Lead aprons
B
Dosimeters
C
Thyroid shields
D
Film badges
Question 33Single Answer
A primary barrier in radiography rooms is designed to:
A
Absorb primary radiation
B
Shield against scattered radiation only
C
Reduce patient exposure
D
Increase the quality of the X-ray beam
Question 34Single Answer
The ALARA principle in radiography stands for:
A
As Low As Reasonably Achievable
B
As Large As Radiation Allows
C
Allowable Levels of Radiation Absorption
D
Achievable Levels of Radiographic Accuracy
Question 35Single Answer
What is the purpose of the automatic exposure control (AEC) in X-ray machines?
A
Reduce scatter radiation
B
Maintain optimal image quality by adjusting exposure time
C
Increase beam intensity
D
Improve spatial resolution
Question 36Single Answer
The rotating anode in X-ray tubes is used to:
A
Increase the efficiency of X-ray production
B
Distribute heat over a larger surface area
C
Reduce beam divergence
D
Improve contrast resolution
Question 37Single Answer
Regular calibration of X-ray machines is essential to:
A
Maintain consistent image quality and patient safety
B
Increase patient dose
C
Reduce operator workload
D
Enhance image contrast
Question 38Single Answer
The filtration of an X-ray beam removes:
A
High-energy photons
B
Low-energy photons that contribute to patient dose but not image quality
C
All photons above the threshold energy
D
Only scattered photons
Question 39Single Answer
The role of a collimator in an X-ray system includes:
A
Increasing patient dose
B
Reducing scattered radiation and improving image contrast
C
Removing high-energy X-rays
D
Enhancing detector sensitivity
Question 40Single Answer
Digital radiography offers the advantage of:
A
Reduced radiation dose compared to film radiography
B
Automatic image enhancement
C
Immediate image review
D
All of the above
Question 41Single Answer
Flat-panel detectors are commonly used in:
A
Conventional film-screen radiography
B
Digital radiography
C
Computed tomography
D
Magnetic resonance imaging
Question 42Single Answer
Image noise in digital radiography can be reduced by:
A
Increasing mA
B
Decreasing kVp
C
Using smaller focal spot sizes
D
Increasing detector sensitivity
Question 43Single Answer
PACS (Picture Archiving and Communication System) is used for:
A
Storing and transmitting digital radiographic images
B
Collimation of X-rays
C
Reducing scattered radiation
D
Enhancing beam quality
Question 44Single Answer
In computed radiography, the imaging plate is coated with:
A
Lead
B
Photostimulable phosphor
C
Silver halide crystals
D
Tungsten
Question 45Single Answer
Grid cut-off artifacts occur due to:
A
Incorrect grid alignment
B
Low kVp settings
C
Excessive mA
D
Motion blur
Question 46Single Answer
Quantum mottle is caused by:
A
Insufficient X-ray photons reaching the detector
B
High-energy X-rays
C
Scatter radiation
D
Excessive collimation
Question 47Single Answer
A blurred X-ray image can be caused by:
A
Patient movement during exposure
B
Large focal spot size
C
Long exposure time
D
All of the above
Question 48Single Answer
The most common cause of repeated radiographs is:
A
Improper collimation
B
Patient positioning errors
C
Low mA settings
D
Excessive kVp
Question 49Single Answer
Overexposure artifacts in digital radiography appear as:
A
Blackened images with loss of detail
B
Underexposed, noisy images
C
Increased spatial resolution
D
Uniformly gray images
Question 50Single Answer
The ALARA principle in radiology refers to:
A
Reducing image resolution
B
Maintaining radiation exposure As Low As Reasonably Achievable
C
Increasing patient dose for better images
D
Using the highest dose permissible
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Radiodiagnosis
Question 51Single Answer
Lead aprons primarily protect against:
A
Scatter radiation
B
Direct X-ray beams
C
Gamma radiation
D
Neutron radiation
Question 52Single Answer
The unit of radiation exposure in air is:
A
Gray (Gy)
B
Sievert (Sv)
C
Roentgen (R)
D
Becquerel (Bq)
Question 53Single Answer
A dosimeter is used to:
A
Monitor the temperature of X-ray tubes
B
Measure radiation dose received by personnel
C
Improve image quality
D
Optimize patient positioning
Question 54Single Answer
Which protective device is used to reduce thyroid exposure during radiography?
A
Lead apron
B
Thyroid shield
C
Collimator
D
Gonadal shield
Question 55Single Answer
The maximum permissible dose for radiology personnel annually is:
A
50 mSv
B
100 mSv
C
5 mSv
D
20 mSv
Question 56Single Answer
Which material is most commonly used for radiation shielding in radiology rooms?
A
Aluminum
B
Copper
C
Lead
D
Steel
Question 57Single Answer
Radiation badges measure exposure using:
A
Scintillation counters
B
Thermoluminescent detectors (TLDs)
C
Photographic film
D
Geiger-Müller counters
Question 58Single Answer
The purpose of collimation in radiography is to:
A
Increase patient dose
B
Reduce the field size and scatter radiation
C
Improve the quality of the X-ray tube
D
Enhance beam intensity
Question 59Single Answer
Gonadal shielding is most effective when placed:
A
Directly on the X-ray tube
B
Over the patient’s gonads during imaging
C
Near the detector
D
Between the patient and the grid
Question 60Single Answer
The unit of effective dose is:
A
Gray (Gy)
B
Sievert (Sv)
C
Roentgen (R)
D
Becquerel (Bq)
Question 61Single Answer
The primary purpose of beam filtration is to:
A
Increase image noise
B
Remove low-energy X-rays that contribute to patient dose
C
Reduce the intensity of the primary beam
D
Increase scatter radiation
Question 62Single Answer
Which device measures the cumulative radiation dose received over time?
A
Geiger counter
B
Ionization chamber
C
Film badge dosimeter
D
Collimator
Question 63Single Answer
Which organ is most sensitive to radiation?
A
Bone
B
Thyroid
C
Skin
D
Lens of the eye
Question 64Single Answer
The “ten-day rule” in radiology refers to:
A
Performing X-rays only during the first 10 days of the menstrual cycle for women of childbearing age
B
Calibrating X-ray machines every 10 days
C
Monitoring radiation exposure every 10 days
D
Performing maintenance checks on protective devices
Question 65Single Answer
The contrast of an X-ray image is primarily determined by:
A
mA
B
kVp
C
Exposure time
D
Focal spot size
Question 66Single Answer
Increasing the mA in X-ray imaging results in:
A
Higher contrast
B
Greater X-ray photon production
C
Reduced patient dose
D
Increased scatter
Question 67Single Answer
The relationship between kVp and image contrast is:
A
Higher kVp increases contrast
B
Higher kVp decreases contrast
C
kVp has no effect on contrast
D
Contrast is determined only by mA
Question 68Single Answer
Spatial resolution in digital radiography depends on:
A
Detector pixel size
B
Beam filtration
C
kVp and mA settings
D
Patient positioning
Question 69Single Answer
Which factor is most critical in reducing image noise?
A
Lower mA
B
Increased exposure time
C
Higher kVp
D
Reduced scatter
Question 70Single Answer
Motion blur in radiography can be minimized by:
A
Increasing exposure time
B
Using shorter exposure times
C
Increasing kVp
D
Decreasing mA
Question 71Single Answer
Grid usage in X-ray imaging helps:
A
Increase image contrast by reducing scatter radiation
B
Enhance beam penetration
C
Decrease patient dose
D
Improve spatial resolution
Question 72Single Answer
Focal spot size affects:
A
Beam filtration
B
Image sharpness and resolution
C
Radiation dose
D
Scatter radiation
Question 73Single Answer
Quantum mottle in digital X-rays occurs due to:
A
Insufficient X-ray photons reaching the detector
B
Overexposure
C
High mA settings
D
Poor collimation
Question 74Single Answer
Increasing the distance between the X-ray tube and the detector results in:
A
Reduced image sharpness
B
Reduced radiation intensity due to the inverse square law
C
Increased patient dose
D
Greater scatter
Question 75Single Answer
What does "signal-to-noise ratio" (SNR) represent in radiography?
A
Image sharpness
B
Image contrast
C
Clarity of the image against background noise
D
Radiation dose
Question 76Single Answer
High contrast images are typically achieved using:
A
High kVp and low mA
B
Low kVp and high mA
C
High exposure time
D
Grid usage
Question 77Single Answer
Scatter radiation is reduced by:
A
Using anti-scatter grids
B
Increasing mA
C
Using larger field sizes
D
Lowering kVp
Question 78Single Answer
The "penumbra" in an X-ray image refers to:
A
Central sharp area of the image
B
Blurred edge of the image
C
Overexposed area
D
Underexposed area
Question 79Single Answer
The relationship between field size and scatter is:
A
Smaller field sizes increase scatter
B
Smaller field sizes reduce scatter
C
Field size does not affect scatter
D
Larger field sizes reduce scatter
Question 80Single Answer
The primary function of a radiation monitoring badge is to:
A
Protect against radiation exposure
B
Measure accumulated radiation dose over time
C
Enhance image quality
D
Monitor patient dose
Question 81Single Answer
Protective barriers in radiology rooms are designed based on:
A
The type and frequency of radiological procedures
B
The age of the patients
C
The energy output of the X-ray machine
D
Both a and c
Question 82Single Answer
Which of the following reduces radiation exposure to the radiographer?
A
Increasing exposure time
B
Standing behind a lead shield
C
Using a high kVp technique without filtration
D
Increasing the X-ray tube current
Question 83Single Answer
Which of these is a personal protective device in radiology?
A
Collimator
B
Dosimeter
C
Thyroid collar
D
Ionization chamber
Question 84Single Answer
The term “occupational dose” refers to:
A
Radiation received during diagnostic imaging procedures
B
Radiation received by radiology staff as part of their work
C
The total dose received by a patient
D
Radiation exposure in industrial environments
Question 85Single Answer
The sharpness of an X-ray image depends on:
A
Tube current (mA)
B
Focal spot size
C
Use of grid
D
Exposure time
Question 86Single Answer
What happens to image noise when mAs is increased?
A
Noise decreases
B
Noise increases
C
Noise remains unchanged
D
Noise depends only on kVp
Question 87Single Answer
Which factor improves image contrast in X-ray imaging?
A
Increasing kVp
B
Decreasing field size
C
Increasing exposure time
D
Using low mA
Question 88Single Answer
Magnification in X-ray images can be minimized by:
A
Increasing the object-to-detector distance
B
Increasing the source-to-object distance
C
Using a smaller focal spot
D
Using low kVp
Question 89Single Answer
A high signal-to-noise ratio (SNR) results in:
A
Blurred images
B
High-quality, clear images
C
Increased radiation dose to the patient
D
Reduced spatial resolution
Question 90Single Answer
Which of these factors reduces quantum mottle?
A
Increasing kVp
B
Increasing the mAs
C
Decreasing the focal spot size
D
Using a lower exposure time
Question 91Single Answer
Collimation is used in radiography to:
A
Focus the X-ray beam
B
Increase image noise
C
Reduce scatter radiation and improve contrast
D
Enhance image sharpness
Question 92Single Answer
The spatial resolution of an X-ray image increases when:
A
The detector pixel size decreases
B
The focal spot size increases
C
The exposure time increases
D
The tube voltage decreases
Question 93Single Answer
The term "grid ratio" refers to:
A
The ratio of primary to scatter radiation
B
The ratio of grid height to the width of interspaces
C
The ratio of patient dose to image quality
D
The thickness of the lead strips in the grid
Question 94Single Answer
What effect does a higher grid ratio have on image quality?
A
Increases scatter radiation
B
Improves contrast by reducing scatter radiation
C
Reduces spatial resolution
D
Increases quantum mottle
Question 95Single Answer
The most effective way to reduce patient dose in radiography is:
A
Increase kVp and reduce mAs
B
Reduce kVp and increase mAs
C
Increase exposure time
D
Decrease source-to-object distance
Question 96Single Answer
Which method reduces scatter radiation during X-ray imaging?
A
Increasing the X-ray tube current
B
Using beam limiting devices
C
Increasing exposure time
D
Reducing source-to-object distance
Question 97Single Answer
High contrast images are generally associated with:
A
Low kVp techniques
B
High kVp techniques
C
Increased exposure time
D
Large field size
Question 98Single Answer
The inverse square law in radiography states that:
A
Radiation intensity decreases proportionally to the square of the distance from the source
B
Radiation intensity increases proportionally to the square of the distance from the source
C
Scatter radiation depends on the square of the field size
D
Patient dose increases with higher kVp
Question 99Single Answer
Reducing the source-to-image distance (SID) will:
A
Increase image sharpness
B
Reduce image magnification
C
Increase radiation intensity at the detector
D
Decrease patient dose
Question 100Single Answer
The primary function of an intensifying screen in radiography is to:
A
Reduce scatter radiation
B
Enhance image contrast
C
Convert X-rays to visible light to reduce patient dose
D
Provide magnified images
Question 101Single Answer
A key benefit of using a radiographic grid is:
A
Reducing patient dose
B
Improving image contrast by reducing scatter radiation
C
Increasing image sharpness
D
Reducing exposure time
Question 102Single Answer
Which of the following is NOT a common positioning method in conventional radiography?
A
Anteroposterior (AP)
B
Lateral
C
Axial
D
Ultrasonic
Question 103Single Answer
Proper collimation in conventional radiography:
A
Decreases scatter radiation and improves image contrast
B
Increases scatter radiation but enhances detail
C
Prolongs exposure time
D
Enhances patient comfort
Question 104Single Answer
The "kVp" setting on an X-ray machine primarily affects:
A
The intensity of X-ray photons
B
The penetration power of X-rays
C
The exposure time
D
The scatter radiation
Question 105Single Answer
Which radiographic view is best for visualizing the sinuses?
A
Lateral view
B
Caldwell view
C
Towne’s view
D
Anteroposterior (AP) view
Question 106Single Answer
When imaging the cervical spine, which position is used to view the odontoid process?
A
Lateral view
B
Anteroposterior (AP) view
C
Open-mouth view
D
Oblique view
Question 107Single Answer
In conventional radiography, which material is commonly used for X-ray grids?
A
Lead
B
Aluminum
C
Copper
D
Tungsten
Question 108Single Answer
The chest X-ray taken in the PA (posteroanterior) projection minimizes magnification of:
A
Lungs
B
Ribs
C
Heart
D
Spine
Question 109Single Answer
The use of low kVp in radiography results in:
A
High contrast images
B
Low contrast images
C
Increased scatter radiation
D
Decreased patient dose
Question 110Single Answer
Fluoroscopy is primarily used for:
A
Static imaging of bones
B
Real-time imaging of moving structures
C
3D imaging of organs
D
Measuring radiation dose
Question 111Single Answer
Which of the following procedures commonly utilizes fluoroscopy?
A
Chest X-ray
B
Barium swallow study
C
Mammography
D
MRI
Question 112Single Answer
The main disadvantage of fluoroscopy is:
A
Limited imaging quality
B
High radiation dose to the patient
C
Inability to visualize soft tissues
D
High equipment cost
Question 113Single Answer
In fluoroscopy, image intensifiers are used to:
A
Enhance contrast resolution
B
Convert X-rays into visible images with less radiation
C
Reduce patient movement during imaging
D
Create magnified images
Question 114Single Answer
Which of the following techniques reduces radiation dose during fluoroscopy?
A
Increasing exposure time
B
Using intermittent fluoroscopy instead of continuous fluoroscopy
C
Increasing the source-to-object distance
D
Lowering the X-ray tube current
Question 115Single Answer
Digital fluoroscopy systems improve image quality by:
A
Reducing scatter radiation
B
Utilizing high-frequency generators
C
Allowing post-processing of images
D
Increasing patient dose
Question 116Single Answer
Fluoroscopy time should be monitored to:
A
Improve image resolution
B
Minimize radiation exposure to the patient and staff
C
Enhance magnification
D
Stabilize the X-ray tube
Question 117Single Answer
The fluoroscopy mode that provides the highest resolution is:
A
Continuous mode
B
Pulsed mode
C
Cine mode
D
High-frame rate mode
Question 118Single Answer
Lead aprons used during fluoroscopy typically have a lead equivalence of:
A
0.25 mm
B
0.5 mm
C
1.0 mm
D
2.0 mm
Question 119Single Answer
In fluoroscopy, automatic brightness control (ABC) adjusts:
A
Patient position
B
X-ray tube current and voltage to maintain image brightness
C
Magnification of the image
D
Collimation
Question 120Single Answer
What is the main purpose of fluoroscopic grid-controlled exposure?
A
Reducing patient movement
B
Allowing selective beam exposure
C
Increasing image contrast
D
Minimizing operator workload
Question 121Single Answer
Which part of the gastrointestinal tract is typically imaged with fluoroscopy during a barium enema?
A
Esophagus
B
Small intestine
C
Colon
D
Stomach
Question 122Single Answer
Digital fluoroscopy differs from conventional fluoroscopy in that it:
A
Eliminates the need for contrast agents
B
Uses flat-panel detectors instead of image intensifiers
C
Operates without X-rays
D
Requires higher radiation doses
Question 123Single Answer
Which fluoroscopic procedure is commonly performed for cardiac evaluation?
A
Barium swallow
B
Coronary angiography
C
Abdominal ultrasound
D
MRI
Question 124Single Answer
Dose reduction in fluoroscopy can be achieved by:
A
Using higher kVp
B
Lowering source-to-image distance
C
Minimizing fluoroscopy time
D
Using continuous imaging
Question 125Single Answer
The main advantage of using a pulsed fluoroscopy mode is:
A
Enhanced image quality
B
Reduced radiation exposure
C
Continuous imaging of structures
D
Improved contrast resolution
Question 126Single Answer
Which of the following is a recommended method to reduce radiation exposure during fluoroscopy?
A
Use higher kVp settings
B
Use the lowest possible mA settings
C
Increase the fluoroscopy time
D
Use a larger focal spot size
Question 127Single Answer
Fluoroscopy is commonly used in:
A
Imaging for MRI
B
Real-time monitoring during surgeries
C
Static bone imaging
D
Diagnostic mammography
Question 128Single Answer
What does the term "cinefluorography" refer to?
A
Imaging of moving organs in real-time
B
Continuous recording of fluoroscopic images for later review
C
Imaging using low-dose X-rays
D
Fluoroscopy used for musculoskeletal imaging
Question 129Single Answer
In fluoroscopy, the term "frame rate" refers to:
A
The number of images captured per second
B
The length of time the X-ray tube is on
C
The intensity of the X-ray beam
D
The duration of patient exposure
Question 130Single Answer
In digital radiography, the use of a flat-panel detector primarily enhances:
A
Image contrast
B
Image storage time
C
Image resolution and speed
D
Patient positioning
Question 131Single Answer
The principle of "dynamic range" in digital radiography refers to:
A
The maximum number of pixels available in the image
B
The contrast ratio of the image
C
The range of X-ray exposure levels the system can capture
D
The spatial resolution of the image
Question 132Single Answer
In computed tomography (CT), the Hounsfield unit (HU) is used to measure:
A
The speed of the scanner
B
The density of tissues in the body
C
The radiation dose to the patient
D
The resolution of the images
Question 133Single Answer
The primary function of a computed radiography (CR) imaging plate is to:
A
Record and store the X-ray energy
B
Convert light into electrical signals
C
Improve image sharpness
D
Reduce scatter radiation
Question 134Single Answer
In radiography, the term "grid ratio" refers to:
A
The contrast between X-ray beam and tissue
B
The number of lead strips per unit length of the grid
C
The size of the X-ray tube
D
The thickness of the X-ray film
Question 135Single Answer
The ALARA principle is most closely associated with:
A
Ensuring image clarity
B
Minimizing radiation exposure
C
Reducing patient discomfort
D
Increasing contrast
Question 136Single Answer
Which of the following radiation protection devices is used to reduce exposure to the thyroid gland?
A
Lead apron
B
Thyroid shield
C
Lead gloves
D
Radiation dosimeter
Question 137Single Answer
The role of a radiation dosimeter is to:
A
Measure the intensity of X-ray beams
B
Record the amount of radiation exposure to personnel
C
Determine the dose delivered to the patient
D
Monitor the quality of X-ray images
Question 138Single Answer
To reduce radiation dose during fluoroscopy, the operator should:
A
Decrease the field size
B
Use a higher dose rate
C
Increase fluoroscopy time
D
Avoid using protective devices
Question 139Single Answer
In fluoroscopy, collimation is important because it:
A
Increases radiation exposure to the patient
B
Reduces the size of the X-ray beam to focus on the area of interest
C
Increases the contrast of the image
D
Reduces the resolution of the image
Question 140Single Answer
For a lateral chest X-ray, the patient should be positioned:
A
Facing the X-ray tube with arms raised
B
On their back, with arms at their sides
C
On their side, with arms raised above the head
D
Supine with the legs extended
Question 141Single Answer
When performing an abdominal X-ray, the patient should be positioned:
A
Supine with arms at the sides
B
Prone with head tilted to one side
C
Lying on their side with legs flexed
D
Sitting upright with arms at the sides
Question 142Single Answer
In a knee X-ray, the patient should be positioned:
A
Prone with the leg fully extended
B
Supine with the leg fully extended
C
Sitting with the knee bent
D
Supine with the knee slightly bent
Question 143Single Answer
In an oblique X-ray, the body is positioned at an angle of:
A
30-45 degrees
B
60-75 degrees
C
90 degrees
D
0 degrees
Question 144Single Answer
For a wrist X-ray, the patient should be positioned:
A
Supine with the arm extended
B
Lying prone with the wrist flexed
C
Sitting with the wrist placed on the X-ray table
D
Supine with the wrist in a neutral position
Question 145Single Answer
Which imaging modality uses magnetic fields and radio waves to produce detailed internal body images?
A
X-ray
B
MRI
C
CT scan
D
Ultrasound
Question 146Single Answer
In mammography, the primary aim is to:
A
Visualize bone fractures
B
Detect tumors or abnormalities in breast tissue
C
Assess lung function
D
Measure blood vessel diameter
Question 147Single Answer
What is the advantage of using a high-frequency generator in radiography?
A
Reduced exposure time
B
Increased patient comfort
C
Reduced radiation dose and improved image quality
D
Easier patient positioning
Question 148Single Answer
Which of the following statements about digital radiography is true?
A
It uses film-based technology
B
It provides quicker image acquisition and lower radiation dose compared to traditional methods
C
It requires a darkroom for image development
D
It does not allow for image enhancement
Question 149Single Answer
In a CT scan, what is the primary function of the scanner’s gantry?
A
To produce X-ray beams
B
To rotate the X-ray tube around the patient
C
To display images
D
To house the computer for data processing
Question 150Single Answer
The primary principle of computed tomography (CT) imaging is based on:
