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Worksheetsimaging modalities
Total questions: 30
Worksheet time: 15mins
What is an X-ray tube?
An evacuated glass bulb with positive and negative electrodes.
A solid metal block with only positive electrodes.
A sealed plastic tube with only negative electrodes.
A glass bulb filled with air and no electrodes.
What is the function of the cathode in an X-ray tube?
It is an electrode toward which negatively charged electrons migrate
It gives off electrons when heated (the source of electrons)
It is a positive electrode
It is an evacuated glass bulb
What is the primary by-product of energy conversion in an X-ray tube?
X-ray
Heat
Light
Sound
What is one of the primary advantages of digital equipment in medical imaging?
It is cheaper than traditional equipment
It allows post-processing of images
It does not require a computer
It cannot be transferred over a network
What are the main components of a film screen system?
A) Radiographic film and intensifying screens
B) X-ray tube and detector
C) Computer and printer
D) Light bulb and lens
What is embedded in the sheet of plastic in an intensifying screen?
Crystals called phosphors
Silver halide grains
Lead foil
Calcium tungstate solution
What happens when phosphors in an intensifying screen are struck by radiation?
Phosphors glow with visible light.
Phosphors become radioactive.
Phosphors emit X-rays.
Phosphors dissolve in the screen.
In the interest of patient safety, what should be kept as low as possible when using intensifying screens?
Dosages
Exposure time
Image resolution
Screen size
Approximately what percentage of the image on the film is made by light from the intensifying screens?
95%
50%
75%
30%
Which layer is considered the heart of a radiographic film?
Supercoating
Emulsion
Adhesive layer
Gelatin
According to the diagram, what is the thickness range of the base layer in X-ray film?
3-5 μm
150-250 μm
100-200 μm
50-100 μm
Where is the x-ray tube located in a fluoroscopy setup?
Inside the x-ray table.
Above the patient.
Inside the control panel.
Next to the monitor.
What does fluoroscopy use to improve and enhance the image and transmit it to the television monitor?
X-ray tube
Image intensifier
MRI scanner
Ultrasound probe
What is one of the main benefits of Computed Tomography (CT)?
Provides cross-sectional views of the body
Only used for bone fractures
Replaces all types of surgery
Only used for dental imaging
During a CT scan, what rotates around the table while the patient lies on a movable couch?
MRI scanner
X-ray tube and radiation detector
Ultrasound probe
Laser scanner
During a computerized tomography (CT) scan, what rotates around the area of the body to generate a 3-D image of the internal structures?
Ultrasound waves
Magnetic field
Thin x-ray beam
Laser beam
Which part of the CT scan machine rotates around the patient to create images?
Motorized platform
Rotating X-ray in the gantry
Patient table
Computer monitor
Magnetic Resonance Imaging allows cross-sectional views of the body to be made without the use of ________ radiation.
ionizing
ultraviolet
infrared
microwave
In Magnetic Resonance Imaging, with the patient lying on the couch in the cylindrical imager, the body part in question is exposed to a ________ field and ________ wave transmission.
magnetic, radio
electric, sound
thermal, light
gravitational, microwave
What does the direction of wave travel indicate in the MRI machine shown in the diagram?
The orientation of the magnetic field
The position of the patient
The strength of the radiofrequency pulse
The type of tissue being imaged
Magnetic Resonance Imaging: The images are produced in the computer by reconstructing the information with the _________?
body part
magnet
electrode
sensor
What do the information and images provide the physician with?
Data about the anatomy of the body part
Data about the physiology of the body part
Data about both the anatomy and physiology of the body part
Data about the patient's medical history
What does MRI stand for in the context of medical imaging?
Magnetic Resonance Imaging
Medical Radiology Investigation
Magnetic Radioactive Imaging
Molecular Resonance Investigation
What part of the body is being scanned in these MRI images?
Heart
Brain
Lungs
Liver
Ultrasound imaging uses which form of energy?
Gamma radiation
High-frequency sound waves
Ionizing radiation
Magnetic pulses
The Doppler technique in ultrasound is primarily used to assess:
Soft tissue density
Bone fractures
Blood flow
Metabolic activity
What makes Nuclear Medicine different from traditional radiology?
It records radiation emitted from inside the body
It uses sound waves for imaging
It does not use imaging equipment
It uses only x-rays
Nuclear Medicine primarily provides what type of imaging?
Structural imaging
Digital subtraction imaging
Bone density imaging
Functional imaging
Which type of radiation therapy uses a machine outside the body to deliver radiation?
Radiofrequency ablation
External Beam Radiation Therapy
Internal radiation therapy
Systemic therapy
Which type of radiation therapy placed the radioactive material inside the body near or within the tumor of the patient?
Radiofrequency ablation
External Beam Radiation Therapy
Internal radiation therapy
Systemic therapy
