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Quantitation of ellipsoid tumor areas using a circumferential measuring device
1Department of Medicine, College of Medicine, University of Arizona, Tucson 85724.
Medical Oncology and Tumor Pharmacotherapy
|January 1, 1988
Summary
The new Tumorimeter device accurately and rapidly measures chest nodule surface area from radiographs. This tool offers a significant improvement over traditional calipers for tumor assessment.
Area of Science:
- Radiology
- Medical Imaging
- Oncology
Background:
- Accurate measurement of chest nodule size is crucial for diagnosis and treatment planning.
- Traditional methods using calipers can be time-consuming and inaccurate.
Purpose of the Study:
- To evaluate the accuracy and speed of the Tumorimeter, a novel device for measuring chest nodule surface area.
- To compare the Tumorimeter's performance against standard Vernier-type calipers.
Main Methods:
- A controlled trial involving 30 chest radiographs with nodules ranging from 1.5 to 5.0 cm.
- Crossover comparison of the Tumorimeter with bidimensional caliper measurements.
- Analysis of surface area error and measurement time.
Main Results:
- The Tumorimeter demonstrated significantly higher accuracy with less than or equal to 5% surface area error.
- Calipers showed a 21-28% overestimate error.
- The Tumorimeter was faster, averaging 10.5 seconds per measurement compared to 22.3 seconds for calipers.
- Both accuracy and speed improvements were statistically significant (P < 0.0001).
Conclusions:
- The Tumorimeter offers enhanced speed and accuracy for measuring ellipsoid chest tumors from radiographs.
- Ellipsoid assessment using the Tumorimeter is superior to bidimensional caliper measurements.
- A prospective trial is planned to further compare measurement methods.