>>4451165
>>4451206
All scanners cause some damage to film, no matter the ISO or type of scanner. This is just how film works, exposure is exposure.

X-rays are less harmful because the exposure is lesser, which is why they're often considered "film safe" up to 1600 ISO. This is actually untrue, you will see the impact at around 800 ISO. For 200 and 400 ISO I haven't had any issues with single passes from X-ray scanners.

CT scanners are for all intents and purposes just X-ray scanners that rotate, to create a 3D projection. This means more exposure which means even lower ISO film will be damaged.

The best video on the topic is on youtube from Lina Bessonova, which explains the damage you may expect, how to identify different scanners and potential defense methods.

Picture is Gold 200 run through the X-ray machine at Vienna airport.