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Dynamic Navigation for Dental Implant Placement

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Published on: September 13, 2022

Optimal caliper placement: manual vs automated methods.

B Yazdi¹, P Zanker, P Wanger

¹Department of Obstetrics and Gynaecology, University of Tuebingen, Tuebingen, Germany.

Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology

|May 15, 2013

Summary

This summary is machine-generated.

An automated system improved intra-operator repeatability for fetal biometric measurements, but not inter-operator repeatability. Automated measurements were not significantly closer to the expert gold standard.

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Area of Science:

Medical Imaging
Fetal Biometry
Ultrasound Technology

Background:

Accurate fetal biometric measurements are crucial for assessing gestational age and fetal growth.
Manual caliper placement in ultrasound can be subject to inter- and intra-operator variability.
Automated systems aim to standardize and improve the accuracy of these measurements.

Purpose of the Study:

To evaluate the repeatability of manual caliper placement for fetal biometry.
To compare manual measurements with an automated caliper placement system.
To assess the impact of operator experience on measurement accuracy.

Main Methods:

Analysis of stored ultrasound images from 95 fetuses (19-25 weeks gestation).
Five operators (varying experience levels) performed manual and automated measurements of BPD, OFD, and FL twice.
Intra-operator repeatability assessed by standard deviation; inter-operator repeatability compared to expert gold standard.

Main Results:

Automated system achieved appropriate measurements in 88.4% of cases.
Manual measurement variability (0.15-1.56) was consistent across operator experience levels.
Automated measurements showed no inter-operator differences and tended closer to the gold standard, but not significantly.

Conclusions:

Automated systems can obtain basic fetal biometric measurements in about 90% of cases.
Automated measurements significantly improved intra-operator repeatability.
Inter-operator repeatability and accuracy relative to expert standards did not show significant improvement with automation.