• Art Jahnke

    Senior Contributing Editor

    Art Janke

    Art Jahnke began his career at the Real Paper, a Boston area alternative weekly. He has worked as a writer and editor at Boston Magazine, web editorial director at CXO Media, and executive editor in Marketing & Communications at Boston University, where his work was honored with many awards. Profile

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There are 2 comments on Speeding Up MRI Scans to Save Lives

  1. The article states that magnetic resonance imaging “exposes patients to radiation”. Unfortunately, the inference brought about by that short phrase is misleading. There is absolutely no ionizing radiation involved in the process of image acquisition with MRI (unlike other medical imaging modalities such as CT, radiography or nuclear medicine). The electromagnetic spectrum utilized in MRI is no more harmful to patients than that used in commercial communications (i.e. radio).

  2. Dear Christopher Fischer,

    Thank you for the comments on this article. The “radiation” in this article refers to “radio wave radiation“, as opposed to “ionizing radiation”; apologies for any confusion this may have caused. MRI employs static magnetic fields and sequences of radio waves to acquire images. The transmitted radio waves may be absorbed by the human body, and the absorbed power is termed the specific absorption rate (SAR). Due to the limitations imposed with regards to SAR, the power of radio waves in MRI is limited. The point we would like to address is that our nonlinear metamaterial for MRI does not increase the SAR in the human body, an important distinction from prior efforts in this space. Thank you for the comment and for giving us a chance to clarify this point.

    Best Regards,
    Xin Zhang

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