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Auto detection and Beam Hold

User defines a spherical ROI around these markers :

TI limit

– COG marker on TI is marked with a cross

– If marker on TI is inside TI Limit, circle is projected as green

– If marker outside TI Limit circle is red

– and if marker can’t be detected, circle is projected as orange

If >=1 markers outside TI limit treatment system can

hold (pause)

the treatment beam: beam hold (BH)

– If time is chosen as trigger and beam is held the system keeps shooting TI

– If all markers return within TI limit system continues beam automatically

ABH can act in passive or active mode