[Measurement of tumor volume by x-ray computed tomography in evaluating the response to treatment]

Oncologists often find it difficult to evaluate response to treatment of solid tumors. CT scan imaging has been used over about the last ten years for follow-up of treated patients, and for the last year has been applied to evaluate objectively the size of deep malignant tumors (32 cases studied). Based on results, difficulties related to the patients, the technician and the apparatus are discussed. The method appears to be 90% reliable and of marked value for follow-up surveillance and adjustment of therapy if required.