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¹Department of Radiation Oncology, Hacettepe University, Faculty of Medicine, Ankara-Turkey DOI : 10.5505/tjo.2019.1935 Concurrent chemoradiotherapy followed by brachytherapy (BRT) is the standard treatment for patients with locally advanced cervical cancer. Today, three-dimensional (3D) image-guided BRT (3D-IGBT) is the new standard. It improves local control, increases overall survival, and minimizes toxicity. Magnetic resonance imaging (MRI), ultrasound (US), computed tomography (CT), and positron emission tomography (PET)/CT can be performed in 3D-IGBT. In cervical cancers, MRI is considered the gold standard imaging modality. It also has been implemented into the cervix 3D-IGBT because of the excellent soft tissue contrast with clear definition of target volumes and easily identified organs at risk (OARs). This review summarizes imaging and volume definitions in 3D-IGBT of cervical cancer. Keywords : Brachytherapy; cervix carcinoma; contouring; imaging; target volume