ASMR

Correcting Patient position

How stable is a mask?

Study

Immobilisation system Imaging modality

Position error

1.8mm ± 0.7mm1.3mm

Boda Heggeman 2006

Thermoplastic mask

CBCT

Scotsch cast mask

1.3mm ± 1.4mm

Thermoplasic mask & Bite block

Masi 2008

CBCT

<1.0mm

Bite block

<1.0mm

Lamda 2009

BrainLab mask BrainLab mask

2D kV images 2D kV images

0.5mm ± 0.3mm 0.7mm ± 0.5mm 0.8mm ± 0.4mm 0.8mm ± 0.5mm

Ramakrishna 2010 Guckenberger 2007

Scotsch cast mask Thermoplastic mask

CBCT

Courtesy M. Guckenberger, ESTRO IGRT course

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