#1
What is the primary use of X-rays in medical imaging?
To create colorful images of the body
To measure temperature
To generate sound waves
To visualize internal structures of the body
#2
Which imaging modality uses radiofrequency waves and strong magnetic fields to generate images of the body?
CT scan
Ultrasound
MRI
Nuclear medicine
#3
Which anatomical structures appear radiopaque on a standard X-ray image?
Lungs
Bones
Blood vessels
Muscles
#4
What imaging technique uses X-rays to create cross-sectional images of the body?
Fluoroscopy
Computed Tomography (CT)
Magnetic Resonance Imaging (MRI)
Ultrasound
#5
Which imaging modality is based on the detection of gamma rays emitted by radioactive substances introduced into the body?
CT scan
MRI
Nuclear medicine
Ultrasound
#6
In X-ray imaging, what does the term 'SID' stand for?
Source-to-Image Distance
Scattered Image Density
Spatial Imaging Detector
Systematic Image Display
#7
Which material is commonly used as a detector in X-ray imaging?
Plastic
Lead
Silicon
Photographic film
#8
What is the purpose of the collimator in X-ray imaging?
To adjust the X-ray tube voltage
To filter X-rays
To restrict the X-ray beam
To enhance image contrast
#9
What is the function of a grid in radiography?
To focus the X-ray beam
To reduce scattered radiation reaching the image receptor
To increase patient dose
To enhance spatial resolution
#10
What is the unit of measurement for X-ray exposure in air?
Gray (Gy)
Sievert (Sv)
Roentgen (R)
Curie (Ci)
#11
Which X-ray projection is commonly used to visualize the cervical spine?
Anteroposterior (AP)
Lateral
Oblique
Towne's
#12
In mammography, what type of X-ray tube target material is commonly used?
Tungsten
Aluminum
Molybdenum
Rhodium
#13
What is the purpose of the X-ray grid in radiography?
To focus the X-ray beam
To reduce patient dose
To reduce scatter radiation reaching the detector
To increase image contrast
#14
What is the purpose of a lead apron in X-ray imaging?
To protect the patient from radiation
To protect the X-ray tube
To shield the operator from scattered radiation
To improve image quality
#15
Which imaging modality uses X-rays to create real-time moving images of the body?
CT scan
MRI
Fluoroscopy
Ultrasound
#16
What is the unit of measurement for radiation dose absorbed by tissue?
Gray (Gy)
Roentgen (R)
Sievert (Sv)
Rad
#17
In X-ray terminology, what does PACS stand for?
Picture Archiving and Communication System
Portable X-ray Apparatus and Computer System
Primary Analysis and Communication System
Peripheral Access Control System
#18
What is the main advantage of using digital radiography over traditional film-based radiography?
Higher radiation dose to the patient
Slower image acquisition
Instant image availability
Limited storage capacity
#19
What is the purpose of a contrast agent in X-ray imaging?
To reduce radiation exposure
To enhance visibility of specific structures
To increase imaging time
To eliminate artifacts
#20
What is the purpose of the X-ray tube housing in radiography?
To filter X-rays
To collimate the X-ray beam
To protect the patient from radiation
To prevent leakage of radiation
#21
What is the typical energy range of diagnostic X-rays used in radiography?
1-10 keV
50-100 keV
500-1000 keV
1-10 MeV
#22
Which X-ray projection is commonly used for imaging the frontal sinuses?
Lateral
Waters
Towne's
Caldwell
#23
In digital radiography, what is the role of the image receptor?
To filter X-rays
To convert X-rays into visible light
To capture and convert X-rays into a digital signal
To amplify the X-ray beam
#24
What is the purpose of the X-ray tube filament in the generation of X-rays?
To filter X-rays
To convert X-rays into visible light
To produce electrons
To focus the X-ray beam
#25
In radiography, what is the purpose of the X-ray tube anode?
To produce electrons
To convert X-rays into visible light
To focus the X-ray beam
To generate X-rays