Phantom-based quality assurance for multicenter quantitative MRI in locally advanced cervical cancer.

Background And Purpose: A wide variation of MRI systems is a challenge in multicenter imaging biomarker studies as it adds variation in quantitative MRI values. The aim of this study was to design and test a quality assurance (QA) framework based on phantom measurements, for the quantitative MRI protocols of a multicenter imaging biomarker trial of locally advanced cervical cancer.

Materials And Methods: Fifteen institutes participated (five 1.

Electric properties tomography: Biochemical, physical and technical background, evaluation and clinical applications.

Electric properties tomography (EPT) derives the patient's electric properties, i.e. conductivity and permittivity, using standard magnetic resonance (MR) systems and standard MR sequences.