Fluke 76-907, 76-908 user manual Introduction, Phantom Description

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General Information

Introduction 1

Section 1

General Information

1.1 Introduction

This user's manual describes a set of MRI phantoms that were manufactured based on the AAPM recommendations and their use in measuring the MRI system performance. These phantoms were designed to measure them conveniently and quickly. The AAPM recommended image parameters described in this document are:

•Image uniformity

•Resonance frequency

•Slice position/separation

•Spatial linearity

•Phase related image artifacts

•Signal-to-noise

•Slice thickness

•Spatial resolution

This set of parameters is measured for monitoring the sensitivity and geometric characteristics of MR imaging clinical systems as specified in the AAPM document.

Two phantoms were designed to meet the AAPM specifications. This manual describes a set of test procedures associated with the phantoms that can be used to evaluate the performance of clinical magnetic resonance imaging systems. These procedures and tests, which are described in the AAPM document, can be used to establish absolute performance standards as well as routine quality assurance programs.

The manual does not include procedures to measure any T1, T2, or proton density, because at the present time there are no commonly accepted standard methods for determining T1, T2, and proton density from image data and because the assessment of these parameters is not currently a part of clinical practice.

1.2 Phantom Description

AAPM specifications provide a framework of requirements for MRI phantoms and their use, but it defines neither how phantoms should be constructed nor how inserts are to be organized. The AAPM MR Phantoms take into consideration a number of factors that maximize convenience and time efficiency for the user. The phantoms were designed to provide maximum amount of information in a reproducible manner with the shortest data acquisition time.

The set consists of two phantoms: a three dimensional resolution and slice (3DRAS) phantom and an uniformity and linearity (UAL) phantom

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Contents Aapm MRI Phantoms Nuclear Associates 76-907Fluke Biomedical Table of Contents Blank Phantom Description IntroductionOuter Shape 6 X 6 X 5 Cubical Box 1 3D Resolution and Slice 3DRAS Phantom ModelMm Gap Slice Thickness Sections Uniformity and Linearity UAL PhantomUAL Phantom with Side View Nuclear Associates 76-908 2Filling the Phantom 1Signal Producing SolutionPhantom Preparation Preparation for Scanning Tests with 3D Resolution and Slice 3DRAS PhantomPositioning the Phantom Scanning ParametersHigh-Contrast Spatial Resolution Signal-To-Noise RatioSlice Position and Separation Slice ThicknessExample Images Nuclear Associates 76-908 Operation Tests with 3D Resolution and Slice 3DRAS Phantom Nuclear Associates 76-908 Operation Tests with 3D Resolution and Slice 3DRAS Phantom Spatial Linearity Distortion Tests With Uniformity and Linearity UAL PhantomImage Uniformity Operation Tests with Uniformity and Linearity UAL Phantom Image ArtifactsAction Criteria DC-Offset ErrorsOperation Tests with Uniformity and Linearity UAL Phantom Nuclear Associates 76-908 Operation Tests with Uniformity and Linearity UAL Phantom Fluke Corporation

76-908, 76-907 specifications

The Fluke 76-907 and 76-908 are advanced digital multimeters designed to cater to the needs of professionals and technicians in diverse fields. Known for their accuracy, durability, and versatility, these instruments have become essential tools for electrical measurement and troubleshooting.

One of the standout features of both the Fluke 76-907 and 76-908 is their superior measurement capabilities. These multimeters can measure AC and DC voltage, current, resistance, frequency, and temperature with impressive precision. The devices are equipped with a large LCD display that provides clear readings, even in low-light conditions, making it easy for users to take measurements in various environments.

The Fluke 76-907 is particularly recognized for its ergonomic design, ensuring comfort during prolonged use. It includes a built-in flashlight to illuminate dark work areas and an adjustable backlight for improved visibility of the display. Additionally, the device features a rugged casing that protects it from drops and impacts, enhancing its longevity and reliability in demanding job sites.

On the other hand, the Fluke 76-908 offers advanced features such as Bluetooth connectivity, enabling users to connect the meter to compatible smartphones and tablets. This feature allows for seamless data transfer and real-time monitoring of measurements via an intuitive app. The integration of wireless technology facilitates remote measurements, which is crucial in hazardous environments where direct access may be restricted.

Both models utilize advanced technology, including True RMS measurements, which ensure accurate readings of complex signals. This is particularly beneficial for professionals working with variable frequency drives, non-linear loads, and harmonics. The Fluke 76-907 and 76-908 also come equipped with a range of safety features, including CAT III and CAT IV ratings, ensuring they can safely handle high-voltage applications.

Battery life is another essential characteristic of these multimeters. Both models are designed for extended usage with efficient power management systems, minimizing downtime caused by battery replacements.

Furthermore, the Fluke 76-907 and 76-908 are straightforward to operate, featuring a user-friendly interface that allows technicians to navigate functions easily. They are ideal for various applications, from routine maintenance and troubleshooting in electrical systems to complex diagnostics in industrial settings.

In conclusion, the Fluke 76-907 and 76-908 digital multimeters stand out for their precise measurements, robust design, and innovative technology. Whether for fieldwork or onsite diagnostics, these multimeters provide reliability and efficiency, making them indispensable tools for professionals in the electrical industry.
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