#1
Which type of radiation is commonly used in diagnostic radiography?
X-rays
ExplanationCommonly used radiation for diagnostic imaging.
#2
What is the function of the X-ray tube in radiography?
To generate X-rays
ExplanationX-ray tubes produce X-ray radiation.
#3
What is the purpose of a radiographic grid in X-ray imaging?
To reduce scattered radiation reaching the image receptor
ExplanationGrids reduce scatter radiation for clearer images.
#4
Which imaging modality uses radiofrequency waves and strong magnetic fields for creating images?
MRI
ExplanationMRI utilizes magnetic fields and radio waves for imaging.
#5
What is the primary purpose of the lead apron worn by patients during X-ray examinations?
To shield from ionizing radiation exposure to sensitive tissues
ExplanationAprons protect patients from radiation exposure.
#6
Which radiographic view is commonly used to assess the alignment of long bones, such as the femur or tibia?
AP (Anteroposterior) view
ExplanationCommon view for assessing long bone alignment.
#7
Which imaging technique is commonly used to visualize blood vessels and assess blood flow?
Magnetic resonance angiography (MRA)
ExplanationMRI technique for imaging blood vessels.
#8
In digital radiography, what is the role of the image receptor?
To convert X-rays into electrical signals
ExplanationImage receptors convert X-rays into signals.
#9
Which of the following factors affects the quality of a radiographic image?
All of the above
ExplanationVarious factors contribute to image quality.
#10
What is the purpose of the X-ray tube housing in radiography?
To protect the user from radiation exposure
ExplanationHousing shields users from radiation.
#11
Which of the following materials is commonly used as a contrast agent in X-ray imaging of the gastrointestinal tract?
Barium sulfate
ExplanationBarium sulfate is a common GI contrast agent.
#12
What is the purpose of the X-ray grid in radiography?
To reduce scattered radiation reaching the image receptor
ExplanationGrids reduce scatter radiation for clearer images.
#13
Which imaging modality is based on the detection of emitted positrons?
Positron emission tomography (PET)
ExplanationPET detects emitted positrons for imaging.
#14
What is the purpose of the X-ray tube collimator in radiography?
To limit the X-ray beam size and shape
ExplanationCollimators control X-ray beam size and shape.
#15
Which imaging technique uses sound waves to create detailed images of internal structures in the body?
Ultrasound
ExplanationUltrasound utilizes sound waves for imaging.
#16
What is the purpose of the collimator in radiography?
To limit the X-ray beam size and shape
ExplanationCollimators control X-ray beam size and shape.
#17
In radiography, what does the term 'mAs' refer to?
Milliampere-seconds
ExplanationMeasurement of X-ray tube current and exposure time.
#18
What is the purpose of contrast media in fluoroscopy?
To enhance visualization of structures by altering tissue density
ExplanationContrast media improve visibility in fluoroscopy.
#19
In radiographic imaging, what does the term 'SID' stand for?
Source-to-Image Detector
ExplanationDistance between X-ray source and detector.
#20
What is the purpose of the 'C-arm' in fluoroscopy?
To provide real-time imaging during procedures
ExplanationC-arm allows real-time imaging in procedures.
#21
What is the primary advantage of computed radiography (CR) over traditional film-screen radiography?
Digital storage and post-processing capabilities
ExplanationCR offers digital storage and processing advantages.
#22
Which radiographic view is commonly used to assess the temporomandibular joint (TMJ)?
Towne's view
ExplanationView commonly used for TMJ assessment.
#23
What is the primary purpose of X-ray tube filtration in radiography?
To reduce patient dose
ExplanationFiltration reduces radiation exposure to patients.
#24
Which type of radiographic image receptor is known for its direct conversion of X-rays into electrical signals?
Digital radiography (DR) detector
ExplanationDR detectors directly convert X-rays into signals.
#25
In radiography, what does the term 'kVp' stand for?
Kilovolt peak
ExplanationMeasurement of X-ray tube voltage.