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Table 1 Interfraction errors measured by matching CBCT setup/pre with CT planning

From: Organ motion in linac-based SBRT for glottic cancer

Interfraction thyroid cartilage motion (mm)

Error type

X

Y

Z

µ

− 0.1

− 0.3

-0.6

∑

0.9

1.3

0.6

σ

1.1

1.3

0.7

  1. ∑, systematic error; σ, random error; µ, average of errors; X, left-right; Y, cranio-caudal; Z, antero-posterior; CBCTsetup, first scan made after setting up the patient on the treatment couch with the room lasers; CBCTpre, second scan possibly performed immediately before treatment
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Radiation Oncology

ISSN: 1748-717X

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