Rad Path Chapter 2 Specialized Imaging Techniques

Screening mammography images include

• AP and lateral projections
• craniocaudal and mediolateral oblique projections 
• craniocaudal and mediolateral projectio
• craniocaudal, mediolateral oblique, and mediolateral projection

Air and bone are _____ in ultrasound.

• Hyperechoic
• Anechoic
• Acoustic barri
• Isoechoic

Helical scanning uses

• conventional single-slice scans
• table movement during scans
• Continuous x-ray exposure during scanning
• Table movement during scanning and continuous XRay exposure during scanning

Cross-sectional images projected by high-frequency sound waves  is the modality known as

• US
• CT
• SPECT
• MRI

In US, the transducer

• A. records the changes in signal pitch and direction
• B. Is made of tungsten
• C. Produces high-frequency sound waves
• D. A and C

Tissue that is echo free or lacking in signal is

• Anechoic
• Echogenic
• Hyperechoic
• Isoechoic

The CT number represents the

• Attenuation of specific tissue relative to water
• Signal intensi
• Tissue echogenicity
• Radionuclide concen

High-resolution CT

• requires a section thickness of 5 to 10 mm
• Requires thin section slices 1.5 to 2 mm
• decreases resol
• Increases volume artifact

In CT the images that demonstrate the inside of a structure through reconstruction are called

• Attenuation of specific tissue relative to water
• Signal intensity
• Virtual reality
• Minimum intensity projection

The modality of choice for the spine and central nervous system us

• US
• CT
• MRI
• SPECT