Objective
Alveolar crestal bone thickness and level provide important diagnostic and prognostic
information for orthodontic treatment, periodontal disease management and dental implants.
Ionizing radiation-free ultrasound has emerged as a promising clinical tool in imaging
oral tissues. However, the ultrasound image is distorted when the wave speed of the
tissue of interest is different from the mapping speed of the scanner and, therefore,
the subsequent dimension measurements are not accurate. This study was aimed at deriving
a correction factor that can be applied to the measurements to correct for discrepancy
caused by speed variation.
Methods
The factor is a function of the speed ratio and the acute angle that the segment of
interest makes with the beam axis perpendicular to the transducer. The phantom and
cadaver experiments were designed to validate the method.
Discussion
The comparisons agree well with absolute errors not more than 4.9%. Dimension measurements
on ultrasonographs can be properly corrected by applying the correction factor without
recourse to the raw signals.
Conclusion
The correction factor has reduced the measurement discrepancy on the acquired ultrasonographs
for the tissue whose speed is different from the scanner's mapping speed.
Keywords
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Article info
Publication history
Published online: February 20, 2023
Accepted:
January 14,
2023
Received in revised form:
January 13,
2023
Received:
October 10,
2022
Identification
Copyright
© 2023 World Federation for Ultrasound in Medicine & Biology. All rights reserved.
