Chapter 5 Vocab Flashcards
Axial resolution
Ability to accurately identify reflectors that are arranged parallel to the ultrasound beam
Contrast resolution
The ability to differentiate one shade of gray from another
Doppler phantom
The test object used to evaluate the flow direction, the depth capability or penetration of the Doppler beam, and the accuracy of the sample volume location and measured velocity
Elevational plane
The resolution in the third dimension of the beam or the slice-thickness plane
Horizontal calibration
The ability to place echoes in the proper location horizontally and perpendicular to the sound beam
Lab accreditation
A voluntary process that acknowledges an organization’s competency and credibility according to standards and essentials set forth by a reliable source
Lateral resolution
The ability to accurately identify reflectors that are arranged perpendicular to the ultrasound beam
Preventative maintenance
A methodical way of evaluating equipment’s performance on a routine basis to ensure proper and accurate equipment function
Quality assurance program
A planned program consisting of scheduled equipment-testing activities that confirm the correct performance of equipment
Registration
The ability to place echoes in the correct location
Sample volume
The area within the range gate where the Doppler signals are obtained
Sensitivity
The ability of a system to display low-level or weak echoes
Slice-thickness phantom
The test object that evaluates the elevational resolution, of the thickness portion, of the sound beam perpendicular to the imaging plane
Tissue-equivalent phantom
The test object that mimics the acoustic properties of human tissue and is used to ensure proper equipment performance
Vertical depth
The distance from the transducer
