HW 8- Imaging Modalities Flashcards
A computed tomography unit with continuously rotating gantry simultaneous with translation of the table is called
- Translation CT
- Helical CT
- Interpolating CT
- Spiral CT
Helical Computed Tomography
High contrast in radiographic film is associated with
- Energy of the radiation
- Light spectrum of the intensifying screen
- Size of the silver halide crystals
- Shape of the silver halide crystals
Size of the silver halide crystals
The numerical value of the pixel intensity of a CT image is referred to as
- Radiation intensity
- The field view
- CT number
- Image reconstruction
CT number
The conversion of x-ray energy into visible light occurs in the
- Intensifying screen
- Film base
- Silver halide layer
- Film emulsion
Intensifying screen
In MRI the component which produces a linear variation in the magnetic field is called the
- Relation timer
- Primary magnet
- Gradient coils
- Radio frequency coils
Gradient coils
Which digital imaging technique uses a cassette with a photostimulable luminescent screen similar to film screen radiography
- Amorphous selenium
- All of the answers are correct
- Digital radiography
- Computed Radiography
Computed Radiography
Which radiographic imaging technology uses a radionuclide attached to a biologically active molecule
- Positron Emission Tomography
- Magnetic Resonance Imaging
- Computed Tomography
- Ultrasound
PET
Which generation of computed tomography consists of rotating x-ray tube and a stationary detector array
- Fifth generation
- Third generation
- Second generation
- Fourth generation
Fourth generation
The parameter which determines the amount of overlap between CT gantry rotations is called
- Interpolation
- Beam width inclusion
- The pitch
- Field overlap
The pitch
Which of the following imaging modalities has the highest spatial resolution
- MRI
- PET
- Ultrasound
- CT
CT
