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Optimal strategy for measuring intraventricular temperature using acceleration motion compensation diffusion-weighted

Shuhei Shibukawa¹, Tetsu Niwa², Naoki Ohno³

¹Department of Radiology, Tokai University Hospital, Isehara, Kanagawa, Japan.

Radiological Physics and Technology

|April 12, 2020

Summary

Motion compensation in diffusion-weighted imaging (DWI) thermometry improves accuracy. Acceleration motion compensation DWI (aMC-DWI) accurately measures intraventricular temperature, unlike conventional DWI (c-DWI) or motion compensation DWI (MC-DWI), especially in areas with cerebrospinal fluid (CSF) pulsation.

Keywords:

Acceleration motion compensation Brain temperature Cerebral ventricle Diffusion-weighted imaging Intraventricular temperature

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Diffusion Imaging in the Rat Cervical Spinal Cord

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Area of Science:

Medical Imaging
Biophysics
Neuroscience

Background:

Cerebrospinal fluid (CSF) pulsation artifacts affect Diffusion-Weighted Imaging (DWI) thermometry.
Accurate intraventricular temperature measurement is crucial for various clinical applications.

Purpose of the Study:

To compare the accuracy of conventional DWI (c-DWI), acceleration motion compensation DWI (aMC-DWI), and motion compensation DWI (MC-DWI) for intraventricular temperature determination.
To evaluate the impact of different b values (1000 s/mm² and 400 s/mm²) on temperature measurement accuracy.

Main Methods:

Eight healthy volunteers underwent 3.0-T MRI scans.
Temperature maps were generated using DWI with b values of 1000 s/mm² and 400 s/mm².
Intraventricular temperatures in the lateral ventricles (LV) and third ventricle (TV) were compared across c-DWI, aMC-DWI, and MC-DWI techniques.

Main Results:

With b=1000 s/mm², c-DWI showed significantly higher temperatures in the TV compared to aMC-DWI (43.12±2.86°C vs. 37.68±1.66°C).
With b=400 s/mm², c-DWI also showed significantly higher temperatures in the TV compared to aMC-DWI (75.07±5.48°C vs. 38.63±0.92°C).
aMC-DWI consistently provided intraventricular temperatures close to or slightly above body temperature, while c-DWI and MC-DWI yielded higher, less accurate readings, particularly in the TV.

Conclusions:

Acceleration motion compensation DWI (aMC-DWI) is a superior technique for accurate intraventricular temperature measurement.
aMC-DWI mitigates CSF pulsation artifacts, leading to more reliable temperature readings compared to c-DWI and MC-DWI.
The findings suggest aMC-DWI can be reliably used for precise intraventricular temperature monitoring.