Original Research

The Role of ADC-Based Thermometry in Measuring Brain Intraventricular Temperature in Children

Matthias W. Wagner

Section of Pediatric Neuroradiology, Division of Pediatric Radiology, Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD

Department of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland

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Steven E. Stern,

Steven E. Stern

School of Mathematical Sciences, Faculty of Science and Engineering, Queensland University of Technology, Brisbane, QLD, Australia

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Alexander Oshmyansky,

Alexander Oshmyansky

School of Mathematical Sciences, Faculty of Science and Engineering, Queensland University of Technology, Brisbane, QLD, Australia

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Thierry A. G. M. Huisman,

Thierry A. G. M. Huisman

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Andrea Poretti,

Corresponding Author

Andrea Poretti

Correspondence: Address correspondence to Andrea Poretti, Section of Pediatric Neuroradiology, Division of Pediatric Radiology, Russell H. Morgan Department of Radiology and Radiological Science, Charlotte R. Bloomberg Children's Center, Sheikh Zayed Tower, Room 4174, 1800 Orleans Street, Baltimore, MD 21287-0842, USA. E-mail: [email protected].Search for more papers by this author

Matthias W. Wagner,

Matthias W. Wagner

Department of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland

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Steven E. Stern,

Steven E. Stern

School of Mathematical Sciences, Faculty of Science and Engineering, Queensland University of Technology, Brisbane, QLD, Australia

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Alexander Oshmyansky,

Alexander Oshmyansky

School of Mathematical Sciences, Faculty of Science and Engineering, Queensland University of Technology, Brisbane, QLD, Australia

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Thierry A. G. M. Huisman,

Thierry A. G. M. Huisman

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Andrea Poretti,

Corresponding Author

Andrea Poretti

First published: 26 December 2015

https://doi.org/10.1111/jon.12325

Citations: 3

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ABSTRACT

BACKGROUND AND PURPOSE

To determine the feasibility of apparent diffusion coefficient (ADC)-based thermometry to assess intraventricular temperature in children.

METHODS

ADC maps were generated from diffusion tensor imaging data, which were acquired with diffusion gradients along 20 noncollinear directions using a b-value of 1000 s/mm². The intraventricular temperature was calculated based on intraventricular ADC values and the mode method as previously reported. The calculated intraventricular temperature was validated with an estimated brain temperature based on temporal artery temperature measurements. We included 120 children in this study (49 females, 71 males, mean age 6.63 years), 15 consecutive children for each of the following age groups: 0-1, 1-2, 2-4, 4-6, 6-8, 8-10, 10-14, and 14-18 years. Forty-three children had a normal brain MRI and 77 children had an abnormal brain scan. Polynomial fitting to the temperature distribution and subsequent calculation of mode values was performed. A correlation coefficient and a coefficient of determination were calculated between ADC calculated temperatures and estimated brain temperatures. Linear regression analysis was performed to investigate the two temperature measures.

RESULTS

ADC-based intraventricular temperatures ranged between 31.5 and 39.6 °C, although estimated brain temperatures ranged between 36.3 and 38.1 °C. The difference between the temperatures is larger for children with more than 8,000 voxels within the lateral ventricles compared to children with less than 8,000 voxels. The correlation coefficient between ADC-based temperatures and the estimated brain temperatures is .1, the respective R² is .01 indicating that 1% of the changes in estimated brain temperatures are attributable to corresponding changes in ADC-based temperature measurements (P = .275).

CONCLUSIONS

ADC-based thermometry has limited application in the pediatric population mainly due to a small ventricular size.

References

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Volume26, Issue3

May/June 2016

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The Role of ADC-Based Thermometry in Measuring Brain Intraventricular Temperature in Children

ABSTRACT

BACKGROUND AND PURPOSE

METHODS

RESULTS

CONCLUSIONS

References

Citing Literature

References

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The Role of ADC-Based Thermometry in Measuring Brain Intraventricular Temperature in Children

ABSTRACT

BACKGROUND AND PURPOSE

METHODS

RESULTS

CONCLUSIONS

References

Citing Literature

References

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