Abstract
In magnetic resonance imaging (MRI) assisted treatment planning it is possible to define the individual target and organs at risk precisely and reproducibly in any plane of interest, in particular in sagittal, coronal, oblique, and arbitrary planes [2, 6]. Prostate cancer is usually irradiated by multiple fields, often by fixed orthogonal AP and lateral fields [1]. In conventional computer tomography (CT) assisted fluoroscopic simulation the target volume and organs at risk are defined in transverse planes based on high soft-tissue contrast [4, 5] and in AP, lateral, and oblique X-ray projections based on low soft-tissue contrast, except using contrast media for bladder and rectum [1].
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