NEMA MS 12-2016 Quantification and Mapping of Geometric Distortion for Special Applications.pdf
《NEMA MS 12-2016 Quantification and Mapping of Geometric Distortion for Special Applications.pdf》由会员分享,可在线阅读,更多相关《NEMA MS 12-2016 Quantification and Mapping of Geometric Distortion for Special Applications.pdf(25页珍藏版)》请在麦多课文档分享上搜索。
1、NEMA Standards PublicationNational Electrical Manufacturers AssociationNEMA MS 12-2016 Quantification and Mapping of Geometric Distortion for Special ApplicationsNEMA Standards Publication MS 12-2016 Quantification and Mapping of Geometric Distortion for Special Applications Published by: National E
2、lectrical Manufacturers Association 1300 North 17thStreet, Suite 900 Rosslyn, Virginia 22209 www.nema.org 2016 National Electrical Manufacturers Association. All rights including translation into other languages, reserved under the Universal Copyright Convention, the Berne Convention for the Protect
3、ion of Literary and Artistic Works, and the International and Pan American Copyright Conventions. NOTICE AND DISCLAIMER The information in this publication was considered technically sound by the consensus of persons engaged in the development and approval of the document at the time it was develope
4、d. Consensus does not necessarily mean that there is unanimous agreement among every person participating in the development of this document. NEMA standards and guideline publications, of which the document contained herein is one, are developed through a voluntary consensus standards development p
5、rocess. This process brings together volunteers and/or seeks out the views of persons who have an interest in the topic covered by this publication. While NEMA administers the process and establishes rules to promote fairness in the development of consensus, it does not write the document and it doe
6、s not independently test, evaluate, or verify the accuracy or completeness of any information or the soundness of any judgments contained in its standards and guideline publications. NEMA disclaims liability for any personal injury, property, or other damages of any nature whatsoever, whether specia
7、l, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, application, or reliance on this document. NEMA disclaims and makes no guaranty or warranty, express or implied, as to the accuracy or completeness of any information published herein, and dis
8、claims and makes no warranty that the information in this document will fulfill any of your particular purposes or needs. NEMA does not undertake to guarantee the performance of any individual manufacturer or sellers products or services by virtue of this standard or guide. In publishing and making
9、this document available, NEMA is not undertaking to render professional or other services for or on behalf of any person or entity, nor is NEMA undertaking to perform any duty owed by any person or entity to someone else. Anyone using this document should rely on his or her own independent judgment
10、or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstances. Information and other standards on the topic covered by this publication may be available from other sources, which the user may wish to consult for additional v
11、iews or information not covered by this publication. NEMA has no power, nor does it undertake to police or enforce compliance with the contents of this document. NEMA does not certify, test, or inspect products, designs, or installations for safety or health purposes. Any certification or other stat
12、ement of compliance with any health or safety-related information in this document shall not be attributable to NEMA and is solely the responsibility of the certifier or maker of the statement. NEMA MS 12-2016 Page i 2016 National Electrical Manufacturers Association CONTENTS Preamble ii Foreword .
13、iii Rationale . iv Scope v Section 1 Definitions . 1 1.1 Specification Volume . 1 1.2 Reference Position 1 1.3 Characterization Volume . 1 1.4 Characterization Area 1 1.5 Image Artifact 1 1.6 Image Distortion 1 1.7 Phantom 1 Section 2 Methods of Measurement . 3 2.1 Test Hardware . 3 2.1.1 MR Charact
14、eristics of the Signal Producing Volume 3 2.1.2 Signal Producing Volume 3 2.1.3 Construction of the Signal Producing Volume 3 2.2 Scan Conditions 5 2.2.1 Reference Position and Acquisition Orientation 6 2.3 Measurement Procedure . 7 2.3.1 Measurement Procedure Hints and Tips 7 Section 3 Reporting of
15、 Results . 9 3.1 Data Reduction 9 3.1.1 Spatial Mapping 9 3.1.2 Scatter Plots 11 3.1.3 Error Table 11 3.1.4 Data Acquisition Parameters . 12 3.2 Sources of Error 13 3.3 References 13 Annex A Polynomial Analysis of the Displacement Errors in Magnetic Resonance Imaging 14 Annex B Changes to Standard .
16、 15 NEMA MS 12-2016 Page ii 2016 National Electrical Manufacturers Association Preamble This is one of a series of test standards developed by the medical diagnostic imaging industry for the measurement of performance parameters governing image quality of magnetic resonance (MR) imaging (MRI) system
17、s. These test standards are intended for the use of equipment manufacturers, testing houses, prospective purchasers, and users alike. Manufacturers are permitted to use these standards for the determination of system performance specifications. This standardization of performance specifications is o
18、f benefit to the prospective equipment purchaser. The parameters supplied with each NEMA measurement serve as a guide to those factors that can influence the measurement. These standards can also serve as reference procedures for acceptance testing and periodic quality assurance. It must be recogniz
19、ed, however, that not all test standards lend themselves to measurement at the installation site. Some test standards require instrumentation better suited to factory measurements, while others require the facilities of an instrumentation laboratory to ensure stable test conditions necessary for rel
20、iable measurements. The NEMA test procedures are carried out using the normal clinical operating mode of the system. For example, standard calibration procedures, standard clinical sequences, and standard reconstruction processes shall be used. No modifications to alter test results shall be used un
21、less otherwise specified in these standards. The NEMA Magnetic Resonance Section has identified a set of key magnetic resonance image quality parameters. This standards publication describes the measurement of one of these parameters. Equivalence It is intended and expected that manufacturers or oth
22、ers who claim compliance with these NEMA standard test procedures for the determination of image quality parameters shall have carried out the tests in accordance with the procedures specified in the published standards. In those cases where it is impossible or impractical to follow the literal pres
23、cription of a NEMA test procedure, a complete description of any deviation from the published procedure must be included with any measurement claimed equivalent to the NEMA standard. The validity or equivalence of the modified procedure will be determined by the reader. Uncertainty of the Measuremen
24、ts The measurement uncertainty of the image quality parameter determined using this standards publication is to be reported, together with the value of the parameter. Justification for the claimed uncertainty limits shall also be provided by a listing and discussion of sources and magnitudes of erro
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- NEMAMS122016QUANTIFICATIONANDMAPPINGOFGEOMETRICDISTORTIONFORSPECIALAPPLICATIONSPDF

链接地址:http://www.mydoc123.com/p-994317.html