MR phantom

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Diagnostic ImagingDI

440.248.9300 www.flukebiomedical.com/rmsFor more information, receive our full product catalog, ororder online, contact Radiation Management Servicesbusiness of Fluke Biomedical: 440.248.9300 orwww.flukebiomedical.com/rms.

Specifications are subject to change without notice.©2005 Fluke Biomedical. All rights reserved. MRI PC/AutoQA is atrademark of The Institute of Radiological Image Sciences, Inc.Megphan is a trademark of the Phantom Laboratory. DICOM is atrademark of Digital Imaging and Communications in Medicine.Pentium is a trademark of Intel Corporation. Microsoft and Windowsare trademarks of Microsoft Corporation. Printed in USA.49-803-ds rev 2 27 feb 05

MRI PC/AutoQA™ SoftwareModel 49-803

•Fast automated MRI analysis forroutine QC or acceptance testing1

•Generates easy to read results withhardcopy output

•Comprehensive trend analysis•Can be configured with variousvendor phantoms including theMagphan™ Phantom

•DICOM® 3.0 compatible; DICOM

storage class provider (SCP)application license provided

•Helps fulfill regulatory requirements

Program test output screenSignal-to-noise ratioThis parameter is calculated by a commonly used equation by determining thequotient of the difference in mean values between a central region and thebackground region, as divided by the standard deviation of the central region.Geometric distortionAlso referred to as linearity (the ability to image a straight line as a straight line).Influencing this parameter is B0 homogenity and x an y gradient linearity. Asimplified method of measuring gradient non-linearity can be accomplished by lineardetermination of the phantom’s dimensions.UniformityVertical and horizontal profiles are generated through the phantom’s center. Thefractional uniformity is calculated as the percentage of the profile pixels within anacceptable range determined by ± 10 of the central mean.The integral uniformity is calculated from the profile data as well.Spatial resolution (pixel size)This measurement tracks the degree of electronic temporal sampling of the RF signalin the phase encoding (y) and readout direction (x), thus reflecting the samplingmatrix fineness. For MRI, the system resolution is determined by the acquisitionmatrix.Slice widthSlice width is derived from gradientinduced resonant excitation regions of themagnetic and RF fields. Methodology forthis measurement resembles that for CT,whereby the full-width at half-maximum(FWHM) of the background correctedramp profile is equivalent to theexperimental slice thickness.

SpecificationsMinimum computer requirements Pentium®

processor, 3.5 inch HD floppy drive, DICOMsupported system with Microsoft® Windows® 95,interfaces for non-DICOM systems available

Available model(s)49-803 MRI PC/AutoQA Software

1AAPM: Task Group No. 1 (1990) & No. 6 (1992), NEMA® Standards Publications No. MS 2.Diagnostic ImagingDI

MRI Surface Coil Phantom*

Nuclear Associates Model 76-904

•Specifically designed forcomprehensive testing of surfacecoils

•Provides proper geometry not foundin conventional head or bodyphantoms

The use of surface coils in Magnetic Resonance Imaging (MRI)has become an important part of the clinical operations in mostMR facilities. Surface coils are preferred in some MR studies, inpart, because their use can minimize motion artifacts, obtain highsignal-to-noise ratio in the areas closer to the surface, and obtainhigh resolution images of smaller areas of interest.

This phantom was specifically designed for acceptance testing androutine QC of surface coils. It provides the proper geometry notfound in conventional head or body phantoms.

The phantom is constructed of non-magnetic Plexiglas®. It is

rectangular in shape, contains three inserts, and is designed to befilled with an MRI signal-producing solution. The void betweenthe inserts provides a fully flooded area.

SpecificationsOuter dimensions 13 (w) x 6 (d) x 6.875 in (h) (33.02 x 15.24 x 17.46 cm)Inner dimensions 12 (w) x 5 (d) x 6 in (h) (30.49 x 12.7 x 15.24 cm)Weight 7.96 lb (3.61 kg)Optional accessoriesCopper Sulfate, 1 gm/l (Model 76-903-7000)Available model(s)76-904 MRI Surface Coil Phantom

*Developed by Seong Ki Mun, Ph.D., Department of Radiology, GeorgetownUniversity Hospital, Washington, DC.

Star pattern insertSquare grid insertFive-section insert

Accuratelyevaluates:•High spatial resolution•RF signal brightnessprofile•Slice thickness•Slice to slice gap•MTF evaluation•Magnetic fielduniformity•Gradient linearity•Image artifacts•And more!