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Test bolus measurement: effects of the respiratory position on bolus arrival time and signal-intensity-time curve quality

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Magnetic Resonance Materials in Physics, Biology and Medicine Aims and scope Submit manuscript

An Erratum to this article was published on 02 October 2007

Abstract

Object The aim of our study is to determine if the respiratory position (free breathing, end expiration) influences bolus arrival time (BAT) or the quality of the SI-time curve in the test bolus measurement.

Materials and methods We examined 150 consecutive patients in free breathing and end expiration with 1 mL contrast media (CM) and a flow of 3 mL/s with MRI. The BAT in the aorta and the quality of the SI-time curve were determined.

Results In 13/300 measurements BAT could not be determined because of poor quality of the SI-time curve (two free breathing, 11 end expiration). Mean BAT was 21 s in both respiratory positions. In 13/137 (9%) there was a difference in BAT in end expiration and free breathing of more than 5 s without a tendency towards elongation or shortening of BAT due to the respiratory command (RC). Quality of the SI-time curve was significantly better in the second of both measurements independently of the respiratory position and in free breathing compared to end expiration.

Conclusion Test bolus examinations may differ in an individual patient of more than 5 s without a tendency towards elongation or shortening due to the RC. SI-time curve quality is negatively influenced by the RC.

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Authors and Affiliations

  1. Department of Radiology, University od Erlangen, maximiliansplatz 1, Erlangen, 91054, Germany

    Rolf Janka, Lell Michael, Uder Michael, Bautz Werner & Wenkel Evelyn

  2. Department of Radiology, Klinikum Nuernberg, Nuremberg, Germany

    Rudy Marius

Authors
  1. Rolf Janka
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  2. Rudy Marius
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  3. Lell Michael
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  4. Uder Michael
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  5. Bautz Werner
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  6. Wenkel Evelyn
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Correspondence to Rolf Janka.

Additional information

An erratum to this article can be found at http://dx.doi.org/10.1007/s10334-007-0083-1

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Janka, R., Marius, R., Michael, L. et al. Test bolus measurement: effects of the respiratory position on bolus arrival time and signal-intensity-time curve quality. Magn Reson Mater Phy 20, 175–179 (2007). https://doi.org/10.1007/s10334-007-0080-4

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  • DOI: https://doi.org/10.1007/s10334-007-0080-4

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