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Fig. 1 | Radiation Oncology

Fig. 1

From: To gate or not to gate - dosimetric evaluation comparing Gated vs. ITV-based methodologies in stereotactic ablative body radiotherapy (SABR) treatment of lung cancer

Fig. 1

Gating and ITV-based volume definition. a For island tumors, ITVs were contoured using the maximum intensity projection of all reconstructed 4DCT phases and expanded isotropically to generate the PTVconv (red line). b For tumors close to high intensity structures such as the liver, the structure overlaps the range of tumor motion and, therefore, contours of the individual phase images are used in addition to the maximum intensity projection to define the boundary of the ITV. c For gating, the 50 % phase of the 4DCT was chosen as the CTV and expanded isotropically to produce the gating PTV, PTVgate

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Radiation Oncology

ISSN: 1748-717X

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