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Fig. 1 | Radiation Oncology

Fig. 1

From: A novel model to correlate hydrogel spacer placement, perirectal space creation, and rectum dosimetry in prostate stereotactic body radiotherapy

Fig. 1

Measurement of a perirectal distance at CTV center on axial CT image (a), and θ in 3-dimensional space on axial and sagittal CT images (a, b). The perirectal distance is measured at each vertex in a 4 × 4 cm coronal grid centered on the prostate midgland, at midline to generate a perirectal space map comprising up to 25 perirectal distance measurements for each patient (c)

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