Chapter 5 Penny Flashcards
the ability to accurately identify reflectors that are arranged parallel to the ultrasound beam
axial resolution
the ability to differentiate one shade of gray from another
contrast resolution
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
Doppler phantom
the resolution in the third dimension of the beam or slice-thickness plane
elevational plane
the ability to place echoes in the proper location horizontally and perpendicular to the sound beam
horizontal calibration
a voluntary process that acknowledges an organization’s competency and credibility according to standards and essentials set forth by a reliable source
lab accreditation
the ability to accurately identify reflectors that are arranged perpendicular to the ultrasound beam
lateral resolution
a methodical way of evaluating equipement’s performance on a routine basis to ensure proper and accurate equipment function
preventative maintenance
a planned program consisting of scheduled equipment-testing activities that confirm the correct performance of the machine
quality assurance program
the ability to place echoes in the correct location
registration
the area within the range gate where the Doppler signals are obtained
sample volume
the ability of a system to display low-level or weak echoes
sensitivity
the test object that evaluates the elevational resolution, or the thickness portion, of the sound beam perpendicular to the imaging plane
slice-thickness phantom
the test object that mimics the acoustic properties of human tissue and is used to ensure proper equipment performance
tissue-equivalent phantom
the distance from the transducer
vertical depth
Comprehensive preventative maintenance must be performed at least:
a. daily
b. semiannually
c. annually
d. when a problem occurs
b
Which test object uses a moving belt, vibrating string or a fluid pump?
Doppler phantom
bWhich of the following tests the ability of reflectors to be accurately imaged within the first centimeter of the sound beam?
a. sensitivity
b. dead zone
c. fresnel zone
d. axial resolution
b
The test used to evaluate the depth of reflectors from a transducer is called:
vertical depth calibration
All of the following are goals for a quality assurance program except:
a. document proper equipment performance
b. optimize image quality consistently
c. keep detailed results from quality assurance testing
d. report equipment malfunctions annually
d
The only certifying agency that offers credentialing exams for cardiac and vascular testing is:
CCI
Which of the following is a voluntary process that acknowledges an organization’s competency and credibility according to standards and essentials set forth by a reliable source?
a. credentialing
b. accredidation
c. licensure
d. registration
b
Which of the following is the system’s ability to detect weak echoes?
a. uniformity
b. registration
c. sensitivity
d. dead zone
c
What type of errors will cause artificial echoes to appear within a cystic structure?
slice thickness
Which of the following indicates the maximum depth of visualization?
a. vertical distance
b. horizontal distance
c. lateral resolution
d. sensitivity
a
Which of the following is as methodical way of evaluating equipment’s performance on a routine basis to ensure proper and accurate equipment function?
a. accreditation
b. quality assurance
c. preventative maintenance
d. credentialing
c
Who among the following is responsible for ensuring an effective quality assurance program in the sonography lab?
a. physician
b. engineer
c. biomedical specialist
d. sonographer
d
Which of the following is the ability to accurately identify reflectors that are arranged front to back and parallel to the ultrasound beam?
a. registration
b. axial resolution
c. vertical distance
d. lateral resolution
b
What is another term used for range accuracy?
depth calibration
Which of the following is the test object that evaluates the elevation resolution, or the thickness portion, of the sound beam perpendicular to the imaging plane?
a. test object
b. Doppler testing phantom
c. Tissue-equivalent phantom
d. slice-thickness phantom
d
What describes the system’s ability to place echoes in the proper location horizontally and perpendicular to the imaging plane?
horizontal calibration
The test object that mimics the acoustic properties of human tissue and is used to ensure proper equipment performance is:
Tissue-equivalent phantom
Which of the following does the Doppler phantom not typically evaluate?
a. Flow direction
b. Subtle tissue differences
c. depth capability of the beam
d. accuracy of sample volume location
b
Which of the following is not an accrediting agency of sonography labs?
a. American Institute of Ultrasound in Medicine
b. American Registry of Diagnostic Medical Sonography
c. Intersocietal Accredidation Commission
d. American College of Radiology
b
Which of the following is not a credential granting body for sonographers?
a. American Registry of Diagnostic Medical Sonography
b. Cardiovascular Credential International
c. American Registry of Radiographic Technologists
d. American Institute of Ultrasound in Medicine
d
