| NEMA MS 8-2016 Characterization of the Specific Absorption Rate (SAR) for Magnetic Resonance Imaging Systems |
| Recognition Number | Radiology |
| Recognition Date | 2018-06-07 |
| Recognition List | 049 |
| Recognition Number | 12-315 |
| Extent | Complete standard |
| Standards Orgs | NEMA National Electrical Manufacturers Association https://www.nema.org/ |
| STG | Radiology |
| FDA Tech | .stds { color: #000000; float: center; width: 950px; margin: 0px 25px 0px 0px; } .stds-middle { color: #000000; float: center; width: 575px; margin: 0px 50px 50px 50px; } /* .stds-left { float: left; margin: 9px 30px 0px 0; } */ .stds-left { color: #000000; float: left; width: 700px; margin: 9px 0px 0px 0px; } .stds-search-left { float: left; width: 610px; margin: 9px 30px 0px 0; } .stds-search-right { float: right; width: 190px; margin: 9px 18px 0 0; padding: 8px 12px 10px 12px; background-color: #f9f9f3; border: 1px solid #b0b0b0; -webkit-border-radius: 6px; -moz-border-radius: 6px; border-radius: 6px; } .stds-right { color: #000000; float: right; width: 170px; margin: 9px 18px 0 0; padding: 8px 12px 10px 12px; background-color: #f3f3f3; border: 1px solid #b0b0b0; border-radius: 6px; } .stds-intro { margin: 0px 0px 18px 0px; padding: 5px 12px 12px 12px; background-color: #e8eff5; border: 1px solid #b0b0b0; border-radius: 6px; } #stds_nr-form { margin-top: 18px; padding-top: 12px; border-top: 1px dashed #b0b0b0; } #stds-form { table-layout:fixed; width: 700px; font-size: 11px; border: 1px solid #b0b0b0; background-color: #f9f9f3; } #stds-form-title{ padding: 3px 3px 3px 3px; width: 100%; background-color: #e8eff5; border-bottom: 1px solid #b0b0b0; margin-top: 0px; } #stds-form-title-left { font-size: 13px; font-weight:normal; } #stds-form-title-right { /*float: right;*/ font-size: 11px; padding: 0px 0px 0px 500px; } #stds-form-results-right { /*float: right;*/ font-size: 11px; padding: 0px 0px 0px 600px; } #stds-search { height: 18px; margin: 0px; padding: 3px 10px; border: 1px solid #b0b0b0; font-size: 12px; color: #484138; } #stds-search:focus, #stds-search:hover { -webkit-box-shadow: 0 0px 6px rgba(0,0,0,.1); -moz-box-shadow: 0 0px 6px rgba(0,0,0,.1); box-shadow: 0 0px 6px rgba(0,0,0,.1); } #stds-results-number { margin-bottom: 12px; font-size: 10px; font-weight: bold; } #stds-results-table { margin-left:auto; margin-right:auto; text-align:left; padding: 0; border-collapse:collapse; table-layout:fixed; background-color: #f9f9f3; border-color: #b0b0b0; border-width: 0 0 1px 1px; border-style: solid; } #stds-results-table th { padding: 6px 12px; background-color: #f9f9f3; border-color: #b0b0b0; border-width: 1px 1px 0 0; border-style: solid; font-size: 12px; } #stds-results-table td { padding: 6px 12px; border-color: #b0b0b0; border-width: 1px 1px 0 0; border-style: solid; text-transform: capitalize; } #stds-results-table tr:nth-child(odd) { /* background-color: #f3f3f3; */ } .sort { float: right; margin: 0px 10px 0px 0px; padding: 0px 5px 5px 5px; } /* .sort { float: right; margin-top: 5px;} */ .sort a { color: #484138; } .sort a:hover { color: #0f2a8c; } Recognized Consensus Standards // Quick Links: Skip to main page content Skip to Search Skip to Topics Menu Skip to Common Links U.S. Food & Drug Administration Follow FDA En Español Search FDA Home Food Drugs Medical Devices Radiation-Emitting Products Vaccines, Blood & Biologics Animal & Veterinary Cosmetics Tobacco Products Recognized Consensus Standards var MP = { Version: '1.0.22', Domains: {'es':'esp.fda.gov'}, SrcLang: 'en', UrlLang: 'mp_js_current_lang', SrcUrl: unescape('mp_js_orgin_url'), init: function(){ if (MP.UrlLang.indexOf('p_js_')==1) { MP.SrcUrl=window.top.document.location.href; MP.UrlLang=MP.SrcLang; } }, getCookie: function(name){ var start=document.cookie.indexOf(name+'='); if(start < 0) return null; start=start+name.length+1; var end=document.cookie.indexOf(';', start); if(end < 0) end=document.cookie.length; while (document.cookie.charAt(start)==' '){ start++; } return unescape(document.cookie.substring(start,end)); }, setCookie: function(name,value,path,domain){ var cookie=name+'='+escape(value); if(path)cookie+='; path='+path; if(domain)cookie+='; domain='+domain; var now=new Date(); now.setTime(now.getTime()+1000*60*60*24*365); cookie+='; expires='+now.toUTCString(); document.cookie=cookie; }, switchLanguage: function(lang){ if(lang!=MP.SrcLang){ var script=document.createElement('SCRIPT'); script.src=location.protocol+'//'+MP.Domains[lang]+'/'+MP.SrcLang+lang+'/?1023749632;'+encodeURIComponent(MP.SrcUrl); document.body.appendChild(script); } else if(lang==MP.SrcLang && MP.UrlLang!=MP.SrcLang){ var script=document.createElement('SCRIPT'); script.src=location.protocol+'//'+MP.Domains[MP.UrlLang]+'/'+MP.SrcLang+MP.UrlLang+'/?1023749634;'+encodeURIComponent(location.href); document.body.appendChild(script); } return false; }, switchToLang: function(url) { window.top.location.href=url; } }; var addthis_config = {data_track_clickback: true, ui_508_compliant: true, services_compact: 'facebook, twitter, linkedin, pinterest_share, email', services_exclude: 'print', image_container: "#user_provided" } ; FDA Home Medical Devices Databases - |
This standard is relevant to medical devices and is recognized on its scientific and technical merit and/or because it supports existing regulatory policies.
This NEMA Standards Publication describes two measurement procedures for whole-body SAR measurements, the calorimetric method and the pulse-energy method. Extrapolation of these data to patient temperature rise is beyond the scope of this document. This document does not apply to gradient (low-frequency time-varying magnetic fields) safety where nerve and cardiac excitation are the primary safety issues. Neither is it intended to apply to spatial peak or local average SAR nor does it address other factors involved with patient heating. The tests specified are only for volume RF transmit coils that produce relatively homogeneous RF fields.
| Regulation Number | Device Name | Device Class | Product Code |
| §892.1000 | Coil, Magnetic Resonance, Specialty | Class 2 | MOS |
| §892.1000 | System, Nuclear Magnetic Resonance Imaging | Class 2 | LNH |
| §892.1000 | System, Nuclear Magnetic Resonance Spectroscopic | Class 2 | LNI |
| Guidance for Industry and Food and Drug Administration Staff : Submission of Premarket Notifications for Magnetic Resonance Diagnostic Devices, Issued November 2016. |