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Fluke 76-907 MR Phantom for Spatial Linearity, Signal-To-Noise, and Image Artifact, UAL Phantom

Models: 76-908 76-907

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MR Phantom for Spatial Linearity, Signal-To-Noise, and Image Artifact

General Information

Phantom Description 1

MR Phantom for Spatial Linearity, Signal-To-Noise, and Image Artifact

Glue	Glue

Linearity Grid, Light Cover

13”

Glue,

Orientation References

Glue				Glue

		13”		Not To Scale
		13”		Not To Scale

	Figure 1-6.		UAL Phantom

MRI Phantom for Spatial Linearity, Signal-To-Noise, and Image Artifact

Glue

Glue 3/16” Wall

¼” Wall

Glue

1”

13” Glue

Flood Section

Two Grids Stacked

Not to Scale

Glue

4”

Figure 1- 7. UAL Phantom with Side View

1-5

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Fluke 76-907 MR Phantom for Spatial Linearity, Signal-To-Noise, and Image Artifact, General Information, UAL Phantom

Contents

Nuclear Associates 76-907 and AAPM MRI PhantomsMarch Manual No. 38616 Rev All product names are trademarks of their respective companiesRadiation Management Services Fluke Biomedical6045 Cochran Road Cleveland, Ohio General Information OperationsTable of Contents Blank page Section General Information1.1 Introduction 1.2 Phantom DescriptionResolution Block Detail - 2 Required 1.2.1 3D Resolution and Slice 3DRAS Phantom ModelFigure 1-2. Resolution Block Detail Outer Shape 6 X 6 X 5 Cubical BoxGeneral Information Figure 1-3. Resolution Sections in Three Imaging PlanesPhantom Description 2 mm Gap 1 mm Gap 1 mm GapNuclear Associates 1.2.2 Uniformity and Linearity UAL PhantomOperators Manual Figure 1-5. Slice Thickness SectionsGeneral Information MR Phantom for Spatial Linearity, Signal-To-Noise, and Image ArtifactPhantom Description UAL PhantomThe flood phantom has a uniform solution, the image of which can be used to measure the uniformity in signal intensity in the images. The grid section consists of grids that can be used to assess geometric linearity Nuclear AssociatesOperators Manual Operation 2.1.1Signal Producing Solution2.1 Phantom Preparation 2.1.2Filling the Phantom2.2 Preparation for Scanning 2.3 Tests with 3D Resolution and Slice 3DRAS Phantom2.2.1 Positioning the Phantom 2.2.2 Scanning Parameters2.3.3 High-Contrast Spatial Resolution 2.3.2 Signal-To-Noise RatioTests with 3D Resolution and Slice 3DRAS Phantom Operation2.3.5 Slice Position and Separation 2.3.4 Slice ThicknessNuclear Associates Operators Manual2.3.6 Example Images Tests with 3D Resolution and Slice 3DRAS PhantomOperation Figures 2-2 and 2-3 represent two adjacent sagital views of the phantom. The resolution holes are well resolved in vertical and horizontal direction and the two slices are 6 mm apart SP = 14.5 and 20.5. The slice thickness images of short vertical lines on top and bottom of the phantom image again are from the crossed hot ramps of 2 mm top and 1 mm bottom Nuclear AssociatesOperators Manual Operation Tests with 3D Resolution and Slice 3DRAS PhantomOperators Manual Nuclear AssociatesTests with 3D Resolution and Slice 3DRAS Phantom Figures 2-7 and 2-8 show an example of the slice thickness measurement analysis. A signal intensity profile is drawn vertically through a set of slice thickness ramp Images. The profile is the slice thickness profile. One can also obtain the slice thickness by measuring full width half maximum of the profile. Figure 2-8 represents the same data using a larger zoom factorOperation 2.4.1 Image Uniformity 2.4 Tests With Uniformity and Linearity UAL Phantom2.4.2 Spatial Linearity Distortion Nuclear Associates2.4.3 Image Artifacts OperationTests with Uniformity and Linearity UAL Phantom 2.4.5 Example Images 2.4.4 Action CriteriaDC-Offset Errors Receive Quadrature ErrorsTests with Uniformity and Linearity UAL Phantom OperationNuclear Associates Operators Manual2-14 Operation Tests with Uniformity and Linearity UAL Phantom2-15 Radiation Management Services Fluke Corporation6045 Cochran Road Cleveland, Ohio