conflict: medical procedure scheduled on yom kippur

this is mostly for my parents, and not myself. i am ethnically jewish, but not really religiously, while my parents are very slightly religiously jewish. i am scheduled to have an MRI on yom kippur this year. it is the only date where i can get this done within the next six months, and my doctor is already unhappy that it’s not happening sooner. my parents want me to reschedule it, but i cannot to a date that is close enough for my comfort surrounding my own health, as this one was the first available.

this mri is being done to try and identify the cause of a rare medical condition i have, and to see if it’s removable. i’ve always heard that life and health are prioritized over mitzvot—where does this lie?

edit note: my parents were not planning to go to services on yom kippur, and also don’t fast. they feel like having this scan done is more sacrilegious.

edit again: UPDATE, my parents have agreed to let me have the MRI. i told my parents about the responses in this thread, and my dad realized that pikuach nefesh applies here and that i will have it done that day, and as he pays for my insurance, my mom can’t do much about it. thank you for all for your help!!!