Accessible Requires Authentication Published by De Gruyter September 6, 2018

Wireless video transmission into the MRI magnet room: implementation and evaluation at 1.5T, 3T and 7T

Bennet Hensen, Urte Kägebein, Marcel Gutberlet, Kristina I. Ringe, Van Dai Vo-Chieu, Daniel Stucht, Oliver Speck, Ralf Vick, Frank Wacker and Enrico Pannicke



To analyze the interference between a wireless high definition multimedia interface (WHDMI) and magnetic resonance imaging (MRI) image quality at 1.5T, 3T and 7T.

Materials and methods

A wireless video transmission system (WVTS) consisting of a WHDMI and a projector was used to transmit and display a video stream into the magnet room. MR image quality was analyzed at 1.5T, 3T and 7T. Signal-to-noise-ratio (SNR¯) and radio frequency (RF)-noise spectrum were measured at three transmitter positions (A: inside the cabin, B: in front of the waveguide and C: in the control room). WVTS system functionality tests included measurements of reliability, delay and image quality.


With the WVTS mean SNR¯ values significantly decreased in comparison to the reference for all positions and fieldstrenghts, while the spectra’s baseline is elevated at 1.5T and 3T. Peaks related to continuous wave interferences are apparent at all field strenghts. For WHDMI alone mean SNR¯ values were stable without significant differences to the reference. No elevation of the spectra’s baseline could be observed. Functionality measurements confirmed high connection reliability with stable image quality and no delays for all field strengths.


We conclude that wireless transmission of video streams into the MRI magnet room is feasible at all field strengths without hampering image quality.

  1. Research funding: This study was financially supported by the Federal Ministry of Education and Research (BMBF), Funder Id: 10.13039/501100002347, grant number 13GW0095A and 13GW0095C.

  2. Conflict of interest: Authors state no conflict of interest.

  3. Informed consent: Informed consent is not applicable.

  4. Ethical approval: The conducted research is not related to either human or animal use.


[1] Kägebein U, Speck O, Wacker F, Hensen B. Motion correction in proton resonance frequency-based thermometry in the liver. Top Magn Reson Imaging 2018;27:53.10.1097/RMR.000000000000015729406416 Search in Google Scholar

[2] Rothgang E, Gilson WD, Wacker F, Hornegger J, Lorenz CH, Weiss CR. Rapid freehand MR-guided percutaneous needle interventions: an image-based approach to improve workflow and feasibility. J Magn Reson Imaging 2013;37: 1202–12.2333492410.1002/jmri.23894 Search in Google Scholar

[3] Weiss CR, Nour SG, Lewin JS. MR-guided biopsy: a review of current techniques and applications. J Magn Reson Imaging 2008;27:311–25.10.1002/jmri.2127018219685 Search in Google Scholar

[4] Rube MA, Holbrook AB, Cox BF, Buciuc R, Melzer A. Wireless mobile technology to improve workflow and feasibility of MR-guided percutaneous interventions. Int J Comput Assist Radiol Surg 2015;10:665–76.2517915110.1007/s11548-014-1109-6 Search in Google Scholar

[5] Lattice Semiconductor. Wireless Connector [Internet]. SiBEAM Snap™ wireless connector. 2018. Search in Google Scholar

[6] Kuo R, Panchal M, Tanenbaum L, Crues JV. 3.0 Tesla imaging of the musculoskeletal system. J Magn Reson Imaging 2007;25:245–61.1726040710.1002/jmri.20815 Search in Google Scholar

[7] Entz K, Sommer A, Lenzen H. Evaluation of the new DIN standard for quality assurance of diagnostic displays – technical review DIN 6868-157. ROFO Fortschr Geb Rontgenstr Nuklearmed 2018;190:51–60.10.1055/s-0043-110862 Search in Google Scholar

[8] F04 Committee. Test Method for Measurement of Radio Frequency Induced Heating On or Near Passive Implants During Magnetic Resonance Imaging. 2011;ASTM F2182-11a(ASTM International, West Conshohocken, PA, Search in Google Scholar

[9] F04 Committee. Standard Test Method for Measurement of Magnetically Induced Torque on Medical Devices in the Magnetic Resonance Environment. 2017;ASTM F2213-17(ASTM International, West Conshohocken, PA, Search in Google Scholar

[10] F04 Committee. Standard Test Method for Measurement of Magnetically Induced Displacement Force on Medical Devices in the Magnetic Resonance Environment. 2015;ASTM F2052-15(ASTM International, West Conshohocken, PA, Search in Google Scholar

[11] Magnetic resonance equipment for medical imaging – part 1: determination of essential image quality parameters. German Organization for Standardization; 2009 Juni. Report No.: IEC 62464-1:2007. Search in Google Scholar

[12] Medical electrical equipment – part 2-33: particular requirements for the basis safety end essential performance of magnetic resonance equipment for medical diagnosis. German Organization for Standardization; 2016 Mai. Report No.: IEC 60601-2-33:2010 Standard. Search in Google Scholar

[13] Medical electrical equipment – part 1-2: General requirements for basic safety and essential performance-collateral standard: electromagnetic disturbances-requirements and test. German Organization for Standardization; 2016 Mai. Report No.: DIN EN 60601-1-2:2016–05. Search in Google Scholar

[14] White MJ, Thornton JS, Hawkes DJ, Hill DLG, Kitchen N, Mancini L, et al. Design, operation, and safety of single-room interventional MRI suites: practical experience from two centers: safety of single-room interventional MRI. J Magn Reson Imaging 2015;41:34–43.10.1002/jmri.2457724497105 Search in Google Scholar

[15] Electromagnetic compatibility – requirements for household appliances, electric tools and similar apparatus – part 1: emission. German Organization for Standardization; 2012 Mai. Report No.: CISPR 14–1. Search in Google Scholar

[16] Shokrollahi P, Drake JM, Goldenberg AA. Signal-to-noise ratio evaluation of magnetic resonance images in the presence of an ultrasonic motor. Biomed Eng Online 2017;16:45.2841061510.1186/s12938-017-0331-1 Search in Google Scholar

[17] Wehner J, Weissler B, Dueppenbecker P, Gebhardt P, Schug D, Ruetten W, et al. PET/MRI insert using digital SiPMs: investigation of MR-compatibility. Nucl Instrum Methods Phys Res A 2014;734:116–21.2584399910.1016/j.nima.2013.08.077 Search in Google Scholar

[18] Dietrich O, Raya JG, Reeder SB, Reiser MF, Schoenberg SO. Measurement of signal-to-noise ratios in MR images: influence of multichannel coils, parallel imaging, and reconstruction filters. J Magn Reson Imaging 2007;26:375–85.10.1002/jmri.2096917622966 Search in Google Scholar

[19] Karlik SJ, Heatherley T, Pavan F, Stein J, Lebron F, Rutt B, et al. Patient anesthesia and monitoring at a 1.5-T MRI installation. Magn Reson Med 1988;7:210–21.10.1002/mrm.1910070209 Search in Google Scholar

Received: 2018-05-12
Accepted: 2018-07-16
Published Online: 2018-09-06
Published in Print: 2019-08-27

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