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Figure 1 | Radiation Oncology

Figure 1

From: The effects of computed tomography image characteristics and knot spacing on the spatial accuracy of B-spline deformable image registration in the head and neck geometry

Figure 1

A selection of the synthetically generated “head-and-neck” phantoms as used in this study. A transversal, sagittal and coronal cross-section of the reference phantom is shown within the white box. Abbreviations of the simulated structures: T = tumour; V = vertebrae; Pl = parotid left; Pr = parotid right; S = spinal cord. Phantoms I-IV have similar properties as the reference phantom but with varying noise levels (1SD noise = ± 40, ± 80, ± 100, and ± 200 HU, respectively). Simulated deformed phantom images are shown by V and X (with grey-value factor of 0.5 and 1.5, respectively). Phantoms XVI and XVII vary in disc spacing (7.0 and 19.0 mm, respectively) from the reference situation (1.0 mm). The properties of all phantoms are listed in Table 1.

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Radiation Oncology

ISSN: 1748-717X

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