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Tumor size on computed tomography scans
Author(s) -
Dachman Abraham H.,
MacEneaney Peter M.,
Adedipe Adeyinka,
Carlin Michael,
Schumm L. Phillip
Publication year - 2001
Publication title -
cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.052
H-Index - 304
eISSN - 1097-0142
pISSN - 0008-543X
DOI - 10.1002/1097-0142(20010201)91:3<555::aid-cncr1034>3.0.co;2-f
Subject(s) - medicine , computed tomography , tomography , medical physics , radiology , nuclear medicine
BACKGROUND Bidimensional tumor measurements are used routinely as surrogates for tumor volume. The purpose this study was to determine whether there is any added benefit in bidimensional or tridimensional measurements over a unidimensional measurement. METHODS Sixty‐nine colorectal hepatic metastases on 19 computed tomography scans (1–8 lesions per scan) from 9 patients were analyzed. Five patients contributed 2–4 scans each (mean, 3 scans). The standard volume of these lesions was determined by the “summation of areas” technique. The maximum axial dimension, the product of the greatest axial dimensions, and several volume estimates (based on the volumes of a sphere, an ellipsoid, and a cube) each were correlated with the standard volume. RESULTS The maximum axial dimension and the product of the greatest axial dimensions correlated equally with tumor volume (correlation coefficient = 0.93). Surrogate measures based on the equations for a sphere and an ellipsoid underestimated tumor volume, whereas the equation for a cube overestimated volume. CONCLUSIONS When reporting tumor size, there is no significant added benefit in reporting bidimensional or tridimensional measurements over the maximum axial dimension. Cancer 2001;91:555–60. © 2001 American Cancer Society.