Davie's SPI Review Questions + Answers Graded A+

Davie's SPI Review
_______ ______ Artifact (AKA _____ _________ Artifact) occurs when the slice
thickness is WIDER than the structure being imaged - ✔️✔️Partial Volume Artifact
(AKA Slice thickness artifact)

When The spatial resolution is equal in all dimensions or imaging planes, it is
considered _________ Resolution - ✔️✔️Isotropic Resolution

Advantages of 3D scanning (over 2D):
(2) - ✔️✔️1) The ability to display image planes impossible to display with 2D imaging.
2) The ability to display orthogonal planes simultaneously

This converter converts the numbers stored in memory to proportional voltages that
control the brightness on a CRT monitor - ✔️✔️Digital to Analog Converter

The Digital Scan Converter is AKA: - ✔️✔️Image Memory

This is where images are stored in the ultrasound system: - ✔️✔️Scan Converter

The system component which is most responsible for transmit focusing: - ✔️✔️Beam
Former

The process of filling in the empty spaces between scan lines: - ✔️✔️Interpolation

Red, Green & Blue- The three colors used for color mapping - ✔️✔️RGB Signal

With ______ signals, the values may vary continuously between a minimum and
maximum point - ✔️✔️Analog

A method in which the sound beam is steered in multiple directions by employing time
delays: - ✔️✔️Spatial Compounding

A term meant to describe 3D imaging with the addition of time: - ✔️✔️4D

Opposite of Isotropic (Meaning the spatial resolution is unequal in all dimensions or
imaging planes): __________ Resolution - ✔️✔️Anistropic Resolution

The bending of a sound beam: - ✔️✔️Refraction

If an image hits a reflector and is said to produce refraction, we must assume that the
artifact is occurring _________ to the reflector - ✔️✔️Laterally

,________ of the Doppler spectrum is an artifact that occurs with pulsed-wave (PW)
Doppler when the frequency is greater than 1/2 the Doppler PRF - ✔️✔️Aliasing

If you obtain a 3D sweep in an axial sweep and are viewing it in a multiplanar display,
the orthogonal planes that will be displayed are _______ and _________ -
✔️✔️Coronal and Saggital

If you are using a beam that produces a very Wide Slice Thickness, a problem that you
will most likely encounter is _______ _______ Artifact - ✔️✔️Partial Volume Artifact

Partial Volume Artifact is AKA: - ✔️✔️Slice THickness Artifact

_____ Imaging is helpful for measring anatomic volumes, especially those that are
irregularly shaped. - ✔️✔️3D

_________ Artifact is created when the sound beam bounces off of one or more
reflectors before it encounters a reflector that redirects it back to the transducer -
✔️✔️Multipath artifact

The incorrect round-trip time of echos with Multipath Artifact, leads to incorrect _____
and _______ placement of objects in the image - ✔️✔️Axial and Lateral

______ ________ imaging may increase visualization of the reflections from blood flow
on the real time ultrasound. This is because of reduced _______, improved contrast
resolution and higher frequency - ✔️✔️TIssue Harmonic Imaging; Clutter

The relationship between Round-Trip pulse travel time and distance to the reflector: -
✔️✔️Range equation

________ _____ ________ is a succesful method of obtaining a 3D dataset and is
based on a six degree of freedom magnetic field sensor - ✔️✔️Magnetic field Tracking

__________ Artifact is commonly seen with metallic objects. Multiple reverberations
within a highly reflective object cause the artifact. The reverberation occurs with the
sound bounces back and forth multiple times between two interfaces. - ✔️✔️Comet
Tail Artifact

_____________ Artifacts commonly result in echoes filling in the lumen of small vessels
- ✔️✔️Partial Volume Artifacts

When you select Harmonic Imaging, _______ _____ are less likely to be observed. -
✔️✔️Grating Lobes

, _____ transducers cause a smearing of the beam and degrade lateral resolution -
✔️✔️Array Transducers

To reduce the effect of grating lobes in an image, reduce or eliminate ____ ________ -
✔️✔️Beam Steering

With the use of Beam Steering with a _______ transducer, Grating lobes become more
prominent - ✔️✔️Linear transducer

To reduce Acoustic Speckle in an image, use _____ ____ averaging and ________
imaging - ✔️✔️Frame Rate averaging & Compound Imaging

To improve Border definition in an image, use _______ ________ Imaging -
✔️✔️Spatial Compound imaging

Selective reception of echoes generated within the body by Nonlinear Propagation: -
✔️✔️Tissue Harmonic Imaging

Tissue Harmonic imaging produces a _______ beam and improved ________
resolution. Demonstration of acoustic shadowing from small calcifications is improved
by reducing _____ _________ with a _______ beam. - ✔️✔️Thinner beam; Contrast
resolution; Slice thickness; Thinner

Aliasing occurs when the frequency shift exceeds 1/2 of the system PRF. This
phenomena is termed: - ✔️✔️The Nyquist Limit

Increased _________ contributes to improved axial resolution in a B-mode image -
✔️✔️Bandwidth

Increased Aperture contributes to improved _______ resolution in a B-mode image -
✔️✔️Lateral resolution

To improve __________ resolution in a B-mode image, focusing with an acoustic lens is
beneficial - ✔️✔️Elevational resolution

______ ________ Imaging technique is helpful in reducing Grating lobes - ✔️✔️TIssue
Harmonic

______ Is a standard for handling and transferring images and medical information
between computers - ✔️✔️DICOM (Digittal imaging and communications in medicine)

To recall a previous exam from the PACS system, you would use the _____________
Feature - ✔️✔️Query/Retrieve