University of Kansas School of Medicine 1 article published in JoVE Bioengineering Construction of a Preclinical Multimodality Phantom Using Tissue-mimicking Materials for Quality Assurance in Tumor Size Measurement Yongsook C. Lee1,2, Gary D. Fullerton2, Beth A. Goins2 1Department of Radiation Oncology, University of Kansas School of Medicine, 2Department of Radiology, University of Texas Health Science Center at San Antonio This paper describes in-house procedures of constructing a preclinical multimodality phantom made of tissue-mimicking (TM) materials for quality assurance (QA) of tumor size measurement in animal imaging modalities such as ultrasound (US), computed tomography (CT) and magnetic resonance imaging (MRI).