84-317
Nuclear Associates
84-317 and 84-317-7000
Multipurpose Tissue/Cyst Ultrasound Phantoms
February 2005
Manual No. 84-317-1 Rev. 2
©2004, 2005 Fluke Corporation, All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies
Users Manual
Fluke Biomedical
Radiation Management Services
6045 Cochran Road
Cleveland, Ohio 44139
440.498.2564
www.flukebiomedical.com/rms
Table of Contents
Section 1: Introduction................................................................................................ 1-1
1.1 Product Description ..................................................................................... 1-1
1.2 Description................................................................................................... 1-1
Section 2: Operation.................................................................................................... 2-1
2.1 Functions ..................................................................................................... 2-1
2.2 Procedures for Using Models 34-317 and 34-317-7000 .............................. 2-1
2.3 Optional Scanning Trough (84-318)............................................................. 2-4
2.4 Storage ........................................................................................................ 2-4
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Introduction
Introduction
1
Section 1
Introduction
1.1 Introduction
These phantoms provide an effective means of monitoring the calibration of an ultrasound system. They
contain precision-spaced groups of nylon monofilament targets, embedded in a medium that exhibits
ultrasound responses similar to those encountered in human liver imaging. They have the same
attenuation, scattering characteristics and propagation velocity as liver parenchyma. Also included are
several sizes of simulated cysts, an encased cyst-like object, and solid tumor-like objects. The transducer
rides along a flexible, smooth exterior surface that simulates human skin texture.
Ultrasound systems can be checked easily for linearity, axial and lateral resolution, ring-down, sensitivity,
depth-marker accuracy and registration. Multipurpose Tissue-Cyst Phantoms provide a consistent
medium that gives repeatable quantitative responses not otherwise obtainable with human subjects.
1.2 Description
The phantoms have a series of monofilament nylon targets, 0.240 mm (0.01 inch) D. Two sets of targets
form resolution group patterns (A, Figure 1-1). The first is 3 cm from one side of the phantom, 18 cm from
the other side. The second group is 13.5 cm from the first side, 7.5 cm from the other. Thus, resolution
measurements can be made at any of four depths.
See Figure 1 for the Locations of the Following Internal Targets.
A. The resolution groups (A, Figure 1-1) have targets with center-to-center spacings of 5 mm, 4 mm, 3
mm, 2 mm and 1 mm for axial resolution tests. Each group has a second row of targets, nearly at
right angles, to give simultaneous transverse resolution information. Spacings are 3 mm, 5 mm, 10
mm, and 15 mm. The axial rows are 10° from perfectly parallel and perpendicular to the phantom's
outside surfaces to decrease acoustic shadowing of some of the monofilament targets by others.
The distances from the phantom's surfaces are close to the focal zone distances of typical short,
medium and long-focus transducers.
B. When scanned from the top, eight rods (B, Figure 1-1) are spaced at increasing distances within
the filling medium, starting at a distance 1 mm from the edge and increasing by 1 mm for each
succeeding rod. This group is used for the rapid measurement of the transducer dead-zone or "ringdown" distance.
C. One group of parallel rods, 1 cm apart in a vertical plane, (C, Figure 1-1) is scanned from the top for
depth calibration, measurement of gain as a function of depth, and measurement of vertical
linearity. This group also gives an indication of the acoustic beam shape with depth since the line
target is generally displayed as a horizontal smear.
D. One group of horizontal parallel rods, 2 cm apart, is used for horizontal calibration and linearity
measurements (D, Figure 1-1).
In the B-mode, both the vertical and horizontal grids
should be imaged from all three scanning surfaces
to measure the registration and linearity of the
scanner and display.
NOTE
1-1
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