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High-Resolution Ultrasonography for the Analysis of Orthotopic ATC Tumors in a Genetically Engineered Mouse Model

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Developing an accurate method for estimating thyroid volume in calves using ultrasonography.

Moritz Metzner¹, Sandra Uebelhack, Carola Sauter-Louis

¹Ludwig-Maximilians Universität, Clinic for Ruminants with Ambulatory and Herd Health Services, Oberschleissheim, Germany.

Veterinary Radiology & Ultrasound : the Official Journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association

|November 12, 2014

Summary

This summary is machine-generated.

Ultrasonography can accurately measure calf thyroid gland volume. A new formula improves accuracy over ellipsoid calculations, correlating calf body mass with thyroid size for better iodine deficiency disorder assessment.

Keywords:

calf iodine deficiency sonography struma thyroid thyroid volume

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Area of Science:

Veterinary Medicine
Endocrinology
Diagnostic Imaging

Background:

Iodine deficiency in calves can lead to thyroid gland diseases, including struma formation.
Accurate assessment of thyroid gland volume is crucial for diagnosing and managing these conditions.
Standardized ultrasonographic methods are needed for reliable thyroid volume determination in young cattle.

Purpose of the Study:

To develop a guideline for standardized ultrasonographic examination of the calf thyroid gland.
To determine the accuracy of ultrasonographic measurements for estimating thyroid volume.
To establish a new formula for calculating thyroid volume based on ultrasonographic data.

Main Methods:

Ultrasonographic measurements of thyroid lobes were performed on 83 calves up to 3 months of age.
Thyroid volume was calculated using ellipsoid formulas and a newly developed regression-based formula.
Validation was conducted by comparing sonographic and slide gauge measurements with water displacement (gold standard) in euthanized animals.

Main Results:

Intraobserver variability for sonographic measurements ranged from 3.04% to 7.35%.
Ellipsoid formulas underestimated thyroid volume compared to water displacement.
A new regression-derived formula significantly improved the estimation of thyroid volume, showing a strong correlation with body mass.

Conclusions:

Standardized ultrasonography provides a reliable method for assessing calf thyroid gland volume.
The newly developed formula enhances the accuracy of ultrasonographic thyroid volume estimation.
This approach allows for comparison of calf thyroid volume with predicted values based on body mass, aiding in the diagnosis of iodine deficiency disorders.