Artifacts
This artifact is located deeper than the real structure and is created when sound reflects off a strong reflector.
What is Mirror Image Artifact?
On a tissue equivalent phantom, a large anechoic circle appears as....
What is a cyst?
The process by which patients are educated about the essentials of a medical procedure.
What is informed consent?
A shadowing system which allows us to view the shape of a sound beam in a medium.
What is a Schlieren?
This exposes the patient to the greatest risk of shock.
What is a cracked transducer housing?
This artifact appears on a spectral doppler display and is a special form of mirror image artifact.
What is Crosstalk?
The focus is the depth at which the intensity is the highest and the beam is the narrowest.
What is the focal zone?
There are 2 patients, one patient has Alzheimer's and the other has Parkinson's, which one is able to give informed consent?
The patient with Parkinson's
Research that is performed within the living body
What is In Vivo?
Between pulsed doppler, color flow doppler, and gray scale imaging; which one is associated with the highest tissue temperature elevation?
What is pulsed doppler?
This is determined by the thickness of the imaging plane.
What is elevational resolution?
This is postioned between the transducer and the patient to allow accurate imaging of important superficial structures.
What is a standoff pad?
You are in the middle of an exam and the patient withdraws consent, when would you end the exam?
promptly or immediately
These tools measure the total power in a sound beam and at a particular location in the sound beam.
What is a calorimeter and a thermocouple?
when a sonographer minimizes patient exposure they are demonstrating the principle of.....
What is ALARA?
This is noise resulting from the construction and deconstructive interference of small sound wavelets.
What is speckle artifact?
The smallest distance at which two pins are positioned parallel to the sound beam and are displayed as two distinct echoes.
What is Axial Resolution?
This is defined by avoidance of unnecessary risk, harm, or needless injury?
What is nonmaleficence
Bubbles that oscillate, expand and contract but do not burst.
What is stabel cavitation?
The presence of false echo signals arising from locations outside of the main sound beam is this type of artifact.
What is clutter?
Propagation speed errors cause this artifact.
What is range error artifact?
The minimum distance at which two side-by-side pins are displayed as two distinct images.
What is Lateral Resolution?
The study of the relationship between a worker and his/her environment.
What is Ergonomics?
Bubbles which burst
What is transient cavitation
Occurs when a reflecting structure is located deeper than the imaging depth of the image.
what is Range ambiguity artifact?