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Fluke 76-908, 76-907 user manual Blank page

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Fluke 76-908, 76-907 user manual Blank page

Contents

AAPM MRI Phantoms Nuclear Associates 76-907 andMarch Manual No. 38616 Rev All product names are trademarks of their respective companiesFluke Biomedical Radiation Management Services6045 Cochran Road Cleveland, Ohio Operations General InformationTable of Contents Blank page General Information Section1.1 Introduction 1.2 Phantom Description1.2.1 3D Resolution and Slice 3DRAS Phantom Model Resolution Block Detail - 2 RequiredFigure 1-2. Resolution Block Detail Outer Shape 6 X 6 X 5 Cubical BoxFigure 1-3. Resolution Sections in Three Imaging Planes General InformationPhantom Description 2 mm Gap 1 mm Gap 1 mm Gap1.2.2 Uniformity and Linearity UAL Phantom Nuclear AssociatesOperators Manual Figure 1-5. Slice Thickness SectionsMR Phantom for Spatial Linearity, Signal-To-Noise, and Image Artifact General InformationPhantom Description UAL PhantomNuclear Associates The 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 linearityOperators Manual 2.1.1Signal Producing Solution Operation2.1 Phantom Preparation 2.1.2Filling the Phantom2.3 Tests with 3D Resolution and Slice 3DRAS Phantom 2.2 Preparation for Scanning2.2.1 Positioning the Phantom 2.2.2 Scanning Parameters2.3.2 Signal-To-Noise Ratio 2.3.3 High-Contrast Spatial ResolutionTests with 3D Resolution and Slice 3DRAS Phantom Operation2.3.4 Slice Thickness 2.3.5 Slice Position and SeparationNuclear Associates Operators ManualTests with 3D Resolution and Slice 3DRAS Phantom 2.3.6 Example ImagesOperation Nuclear Associates 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 bottomOperators Manual Tests with 3D Resolution and Slice 3DRAS Phantom OperationNuclear Associates Operators ManualFigures 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 factor Tests with 3D Resolution and Slice 3DRAS PhantomOperation 2.4 Tests With Uniformity and Linearity UAL Phantom 2.4.1 Image Uniformity2.4.2 Spatial Linearity Distortion Nuclear AssociatesOperation 2.4.3 Image ArtifactsTests with Uniformity and Linearity UAL Phantom 2.4.4 Action Criteria 2.4.5 Example ImagesDC-Offset Errors Receive Quadrature ErrorsOperation Tests with Uniformity and Linearity UAL PhantomOperators Manual Nuclear Associates2-14 Tests with Uniformity and Linearity UAL Phantom Operation2-15 Fluke Corporation Radiation Management Services6045 Cochran Road Cleveland, Ohio