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Fig. 1 | Radiation Oncology

Fig. 1

From: Comprehensive target geometric errors and margin assessment in stereotactic partial breast irradiation

Fig. 1

a Paired orthogonal kV X-ray images acquired during S-PBI treatment. The red squares indicate the identified fiducials. b Illustration of rigid and non-rigid errors. Rigid error is calculated with rigid registration. Non-rigid error accounts for absolute fiducial residual distance after rigid registration. Non-rigid error of a patient is estimated by averaging residual distances over the implanted fiducials. c Illustration of intra-fraction error and composite error

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