Alright well Kodak has confirmed it now, forget passing any film through a CT scanner. I'm not sure what to do to travel with film now.
"[...]To better assess the risk to film from the new carry on scanners we brought a small quantity of Portra 400/135 to John F Kennedy Airport in NYC. With the help of TSA representatives the film was put through the new carry on CT scanners. The initial results are not good. Just 1 scan shows significant film fogging, leading to smoky blacks and loss of shadow detail. This will be more significant for higher speed films[...]"
"[...]To better assess the risk to film from the new carry on scanners we brought a small quantity of Portra 400/135 to John F Kennedy Airport in NYC. With the help of TSA representatives the film was put through the new carry on CT scanners. The initial results are not good. Just 1 scan shows significant film fogging, leading to smoky blacks and loss of shadow detail. This will be more significant for higher speed films[...]"