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ACR Blue Ribbon Panel Response to the AJR Commentary by Shellock and Crues on the ACR White Paper on MR Safety

Emanuel Kanal1, James P. Borgstede2, A. James Barkovich3, Charlotte Bell4, William G. Bradley5, Joel P. Felmlee6, Jerry W. Froelich7, Ellisa M. Kaminski1, Elaine K. Keeler8, James W. Lester9, Elizabeth A. Scoumis1, Loren A. Zaremba10 and Marie D. Zinninger11

1 Department of Radiology, Magnetic Resonance Services, University of Pittsburgh Medical Center, 200 Lothrop St., Pittsburgh, PA 15213-2582.
2 Penrose St. Francis Health System, Colorado Springs, CO 80907.
3 Department of Neuroradiology, Rm. L 371, University of California at San Francisco, 505 Parnassus Ave., San Francisco, CA 94143-0628.
4 Department of Anesthesiology, Yale University School of Medicine, 333 Cedar St., P. O. Box 208051, New Haven, CT 06520-8051.
5 Department of Radiology, University of California at San Diego, 200 West Arbor Dr., San Diego, CA 92103-8224.
6 Department of Radiology, Mayo Clinic, 200 1st S.W., Rochester, MN 55902-3008.
7 Department of Radiology, Hennepin County Medical Center and The University of Minnesota, 701 Park Ave., Minneapolis, MN 55415.
8 National Electrical Manufacturers Association, Philips Medical Systems, 595 Miner Rd., Cleveland, OH 44143.
9 Durham Radiology Associates, Ste. 500, 4323 Ben Franklin Blvd., Durham, NC 27704.
10 Office of Device Evaluation, Center for Devices and Radiological Health, United States Food and Drug Administration, 9200 Corporate Blvd., HFZ-470, Rockville, MD 20850.
11 American College of Radiology, 1891 Preston White Dr., Reston, VA 20191.



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Fig. 1A. Handheld magnet used to assist in detecting ferromagnetic characteristics. Photograph reveals that weak handheld magnet shows no attraction to fire extinguisher hose connector.

 


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Fig. 1B. Handheld magnet used to assist in detecting ferromagnetic characteristics. Photograph reveals that strong (1000-G) heavy Alnico handheld magnet (Sargent-Welch/VWR International, Buffalo Grove, IL) shows no attraction to fire extinguisher hose connector.

 


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Fig. 1C. Handheld magnet used to assist in detecting ferromagnetic characteristics. Photograph reveals that strong rare-earth neodymium 1200-G handheld magnet (Steiner Enterprises, Lafayette, IN) shows definite attraction to fire extinguisher hose connector.

 

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