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MEASURING SPHERE‐LIKE STRUCTURES USING TRANSRECTAL ULTRASONOGRAPHY
Author(s) -
Löfstedt Robert M.,
Ireland William P.
Publication year - 2000
Publication title -
veterinary radiology and ultrasound
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.541
H-Index - 60
eISSN - 1740-8261
pISSN - 1058-8183
DOI - 10.1111/j.1740-8261.2000.tb01474.x
Subject(s) - medicine , perimeter , circumference , ultrasonography , volume (thermodynamics) , nuclear medicine , ultrasound , biomedical engineering , anatomy , geometry , radiology , mathematics , physics , quantum mechanics
Sphere–like structures are commonly measured for clinical or research purposes. We measured two diameters, the circumference (perimeter) and cross sectional area of 113 equine ovarian follicles in a water bath then determined the relationships between those measurements and the actual volume of fluid in the follicles. Cross–sectional area, diameter 3 and area 2/3 were all highly correlated with the volume of the structures and superior (p<0.05) to diameter or perimeter as predictors of volume. As predictors of volume, there was no significant difference (p>0.05) between cross‐sectional area, diameter 3 , and area 2/3 . Because of the ease of measuring diameter, we suggest that diameter 3 be used to estimate the actual size of sphere‐like structures by ultrasonographic measurement. A table was generated for clinical use to show how much the largest diameter of a fluid‐filled structure (follicle, cyst, hematoma, etc.) would have to increase or decrease to indicate a significant change in the volume of the structure.