[quote=AnneO]Chetan,
I think I told you that my parotids were spared, it is written into my plan.... As far as I know what I had was IMRT...
I don't know much about it but I'd say it is not so much dependent upon TOMO but upon whether or not they are able to spare your parotids...
Anne [/quote]

FYI - TOMO is IMRT, just delivered in a 360 degree rotational ARC, rather than standard step & shoot IMRT that is usually delivered from 5 to 9 static positions.

In addition to TOMO, now there is Varian and Novalis RapidARC/SmartARC and Siemens VMAT. All are similar.

It is probably impossible to develop and optimise a Parotid sparing plan with standard IMRT that is equivalent to one with ARC, because with ARC the modulated treatment beam is moving and has infinite entry and exit points as it passes through the isocenter.

None of three major CCC's in the San Diego area seem to be using standard IMRT for OC anymore - all have upgraded to ARC.