• Assessment of system components

Repairs

(a)  

Preventative maintenance

(a)  

Record keeping

(a)  

Ensure proper operation of units

(a)  

Detect gradual changes and avoid minimizing downtime

(a)  

Reduce number of non-diagnostic exams

(a)  

Reduce repeated exams

(a)  

• AIUM 100 mm Test Object

Tissue equivalent phantom

(a)  

Doppler phantom

(a)  

The beam profile device is also called a

(a)  

• Assessment under known, defined conditions

• Constant instrument setting

Phantoms with measurable feature

(a)  

Image in identical environment

(a)  

(a)   quality assurance is unbiased

(a)   quality assurance is not influenced by individual experiences or beliefs

(a)   quality assurance is factual and repeatable

(a)   is influenced by individuals experiences or beliefs

(a)   quality assurance is unverifiable and vary from person to person

(a)   quality assurance is affected by opinions, beliefs, and assumptions

For an AIUM 100 test object, the speed of sound is (a)   to that of soft tissue

Regarding the Lateral resolution aspect of the AIUM 100 test, the pins in the object are (a)   to the sound beams main axis

This phantom has similar features to soft tissue

(a)  

Speed of sound, attenuation, scattering characteristics, and echogenicity are all features of the (a)  

Evaluate gray-scale, tissue textures, multi-focus and adjustable phased   array transducers.

(a)  

This diagram shows a (a)   phantom

Depth calibration, lateral distance, axial resolution

(a)  

Lateral resolution, lesion detection are (a)  

Flow phantoms, circulation pump, and tissue equivalent phantoms are all apart of a (a)  

Vibrating strings and moving belts are also apart of the (a)  

The (a)   evaluates pulsed doppler, CW doppler, color doppler, and power modeD

The (a)   phantom assesses elevational resolution

Diffuse scattering plane at an angle to the incident beam

(a)  

The slice thickness phantom is a (a)   phantom

Regarding slice thickness phantoms , (a)   slices decrease spatial resolution

With a slice thickness phantom, cystic structures may appear (a)   with echoes

With normal sensitivity performance measurements the following are (a)   displayed: pins, solid masses, and cystic structures

Output, TGC, and amplification adjusted establish (a)  

Performance measurements for (a)   include: output power, amplification, set to maximum practical levels, and measures the maximum depth

Sensitivity is the ability of the system to display (a)   echoes

The dead zone is an area (a)   to the transducer that results in inaccurate images?

The dead zone is originated by ___ and ___ (from transmitting to receiving)

(a)  

Dead zone is the (a)   series of pins in a test object

Shallowest depth at which uniform tissue texture appears, with Tissue Equivalent.

(a)  

Broken crystal, detached backing material, longer pulse duration =

(a)  

Highest intensity
• Narrowest beam
• Best lateral resolution

(a)  

(a)   must be carefully evaluated

Smallest distance at which two pins parallel to the sound beam are displayed as two different echoes

(a)  

Scanning sets of successively closed spaced pins in the phantom

(a)  

Minimum distance at which two side-by-side pins are displayed as two distinct images

(a)  

Measure width of reflections on the display created by point targets in the phantom

(a)  

Scanner sensitivity and reliability has (a)   and many instruments include internal diagnostic testing start-up mechanisms which identify improper electronic operation

Penetration, distance accuracy, image uniformity, accuracy of image display, and accuracy of image recording

(a)  

Top surface.
•Pins at the top of test object.

(a)  

Distance from transducer to an area in the near field covered by reverberation

(a)  

Top surface.
•Rod group in the middle (separated 1, 2, 3, 4, 5 mm) in oblique plane

(a)  

The smallest separation of the two closest rods seen 


(a)  

Side surface of the object.
•Scanning same rod for axial resolution

(a)  

The smallest separation of the two closest rods seen

(a)  

Vertical and horizontal accuracy of the electronic calipers.
•Scanning vertical and horizontal equidistant rods from the top (each rod separated 20 mm)

(a)  

Measure the distance between the rods and compare to the actual distance

(a)  

Measures the weakest echo signal.
•Determined by the gain setting, with no TGC

(a)  

The bottom rod of the group of six vertical equidistant rods is used

(a)  

Dead zone: Evaluate by the (a)   surface of the object and scanning the pins located at the top of the object

It documents the distance from the face of the transducer to an area within the near field which cannot be used to image due to reverberation artifact or transducer design

(a)  

Vertical and horizontal accuracy

(a)  

Vertical and horizontal accuracy. Calibration by scanning vertical and horizontal equidistant rods from the top

(a)  

Assessment of depth and horizontal accuracy involves comparing the known distance between rods with
the distance indicated by the calipers on the image

(a)  

1

(a)  

2

(a)  

3

(a)  

4

(a)  

5

(a)  

6

(a)  

Use pins parallel to the sound bea

Top surface of the object
Rod group in the middle
Measure the two pins with space and are closest together

(a)  

Pins perpendicular to the sound beam
Top surface of the phantom
Use middle rods closest together and off set to the side
Measure the set of pins closest side to side and visualized as two separate pins

(a)  

Tissue Phantom: Use cylindrical objects within.
Inclined Plane Phantom: Two sections forming a flat interface oriented at 45 degrees

(a)  

TGC characteristics: Measures system uniformity to display echoes of equal magnitude

(a)  

System Sensitivity: Measures maximum depth of visualization.
Contrast Resolution: Gray scale targets

(a)  

What is this used for?

(a)  

A

(a)  

B

(a)  

C

(a)  

D

(a)  

E

(a)  

(a)   are those at which all the pins, solid masses, and cystic structures in the test phantom are accurately displayed

(a)   is evaluated with the output power and amplification of the system set to maximum practical levels

The dots at the top of this image =

(a)  

The dead zone is assessed with the (a)   series of pins

The (a)   results from transducer ringing and the time it takes to switch from the transmit to receive mode

This image shows the (a)   phantom

1

(a)  

2

(a)  

3

(a)  

4

(a)  

5

(a)