Quantitation of ellipsoid tumor areas using a circumferential measuring device

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3 Scopus citations


A controlled trial of a new circumferential area measuring device, the Tumorimeter, was performed on a set of 30 radiographs of chest nodules ranging in size from 1.5 to 5.0 cm diameter. The Tumorimeter is a hand-held device with a sliding radiolucent loop used to circumferentially measure ellipsoid tumors. It is calibrated in cm2 of surface area. In a crossover comparison with standard Vernier-type calipers, the Tumorimeter was significantly more accurate than bidimensional caliper determinations (≤ 5% surface area error vs a 21-28% overestimate error for calipers). It was also more rapid (an average of 10.5 sec for the Tumorimeter vs 22.3 sec for calipers for each measurement). Both results were statistically significant, P < 0.0001 by analysis of variance. This trial demonstrates that enhanced speed and accuracy in tumor measurement are possible by using ellipsoid assessments of radiographs. A prospective clinical trial is planned to compare rectangular areas obtained using bidimensional tumor widths, with ellipsoid areas obtained by circumferential tumor measurements using the Tumorimeter.

Original languageEnglish (US)
Pages (from-to)249-251
Number of pages3
JournalMedical Oncology and Tumor Pharmacotherapy
Issue number4
StatePublished - Dec 1988


  • Clinical response
  • Measurement
  • Radiographs
  • Staging
  • Tumorimeter

ASJC Scopus subject areas

  • Oncology
  • Cancer Research


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