Design and testing of an MRI-compatible cycle ergometer for non-invasive cardiac assessments during exercise

BioMedical Engineering OnLine

Silmara Gusso¹  Carlo Salvador³  Paul Hofman⁵  Wayne Cutfield¹  James C Baldi²  Andrew Taberner⁴  Poul Nielsen⁴ 

[1] Liggins Institute, University of Auckland, Auckland, New Zealand

[2] Department of Medicine, University of Otago, Otago, New Zealand

[3] Department of Engineering Science, University of Auckland, Auckland, New Zealand

[4] Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand

[5] Liggins Institute, University of Auckland, 2-6 Park Ave, Grafton, Auckland, New Zealand

关键词: Magnetic resonance imaging;    Left ventricular function;    Cycle ergometer;   

Others  :  798115
DOI  :  10.1186/1475-925X-11-13

 received in 2011-09-06, accepted in 2012-03-18,  发布年份 2012

【 摘 要 】

Background

Magnetic resonance imaging (MRI) is an important tool for cardiac research, and it is frequently used for resting cardiac assessments. However, research into non-pharmacological stress cardiac evaluation is limited.

Methods

We aimed to design a portable and relatively inexpensive MRI cycle ergometer capable of continuously measuring pedalling workload while patients exercise to maintain target heart rates.

Results

We constructed and tested an MRI-compatible cycle ergometer for a 1.5 T MRI scanner. Resting and sub-maximal exercise images (at 110 beats per minute) were successfully obtained in 8 healthy adults.

Conclusions

The MRI-compatible cycle ergometer constructed by our research group enabled cardiac assessments at fixed heart rates, while continuously recording power output by directly measuring pedal force and crank rotation.

【 授权许可】

   
2012 Gusso et al; licensee BioMed Central Ltd.

【 图 表 】

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