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Last Updated: 04/25/2012

Response Evaluation Criteria in Solid Tumors

In 2000, an international committee first promulgated unified, easily applicable criteria for measuring tumor response using X-ray, CT, and MRI which are known as Response Evaluation Criteria in Solid Tumors (RECIST). The technique is recommended but not mandatory for NCI-sponsored clinical trials and involves formalized rules for measurement of tumor target lesions. The latest version of the criteria, RECIST Guideline (Version 1.1), was published in 2009.

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Associate Director

Paula M. Jacobs, Ph.D. Paula M. Jacobs, Ph.D., is Associate Director, Cancer Imaging Program in the Division of Cancer Treatment and Diagnosis at the National Cancer Institute. She came to work at the NCI after 30 years in the pharmaceutical and medical device industries where she was a key developer of ultrasmall superparamagnetic iron oxide drugs as magnetic resonance imaging agents and iron replacement therapeutics. More…

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