title: Simple diagrammatic approach to delineate duodenum on a radiotherapy planning CT scan.
abstract: In recent years, there has been increasing application of intensity-modulated radiotherapy and stereotactic body radiotherapy for the treatment of abdominal malignancies (stomach, pancreas, liver, spinal metastases). This warrants accurate delineation of organs at risk, especially the duodenum. The tortuous and curvy anatomy of duodenum often indistinguishable from adjoining organs is a practical challenge. Radiation Therapy Oncology Group (RTOG) has already published upper abdominal normal structure contouring guidelines to ease the delineation process. This pictorial essay following the RTOG guideline elaborates the step-by-step identification of the different parts of duodenum in relation to the adjoining important structures.
authors.affiliation: 1 Division of Radiation Oncology, Medanta The Medicity, Gurgaon, India.
authors.forename: Tejinder
authors.initials: T
authors.lastname: Kataria
authors.affiliation: 1 Division of Radiation Oncology, Medanta The Medicity, Gurgaon, India.
authors.forename: Deepak
authors.initials: D
authors.lastname: Gupta
authors.affiliation: 1 Division of Radiation Oncology, Medanta The Medicity, Gurgaon, India.
authors.forename: Trinanjan
authors.initials: T
authors.lastname: Basu
authors.affiliation: 2 Department of Radiology and Imaging, Medanta The Medicity, Gurgaon, India.
authors.forename: Shivani
authors.initials: S
authors.lastname: Gupta
authors.affiliation: 1 Division of Radiation Oncology, Medanta The Medicity, Gurgaon, India.
authors.forename: Shikha
authors.initials: S
authors.lastname: Goyal
authors.affiliation: 1 Division of Radiation Oncology, Medanta The Medicity, Gurgaon, India.
authors.forename: Susovan
authors.initials: S
authors.lastname: Banerjee
authors.affiliation: 1 Division of Radiation Oncology, Medanta The Medicity, Gurgaon, India.
authors.forename: Ashu
authors.initials: A
authors.lastname: Abhishek
authors.affiliation: 1 Division of Radiation Oncology, Medanta The Medicity, Gurgaon, India.
authors.forename: Shyam S
authors.initials: SS
authors.lastname: Bisht
authors.affiliation: 1 Division of Radiation Oncology, Medanta The Medicity, Gurgaon, India.
authors.forename: Kushal
authors.initials: K
authors.lastname: Narang
mesh_terms: D004386:Duodenum / Q000000981:diagnostic imaging*; D006801:Humans; D058958:Organs at Risk; D016634:Radiosurgery / Q000379:methods; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods*; D050397:Radiotherapy, Intensity-Modulated / Q000379:methods; D014057:Tomography, X-Ray Computed / Q000379:methods*