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January 6, 2017 11:46 AM EST

Since being diagnosed with breast cancer in 2015, Shannen Doherty has been very open about her battle. Fans have praised her honesty about the treatments and daily life of living with the disease, and this week she took it to a new level by writing an emotional post to her radiation machine.

“This is Maggie. I’ve seen Maggie five days a week for what seems like forever. We have a love hate relationship. I love her because she’s part of the life saving treatment I’m receiving,” Doherty wrote on Instagram. “It’s astounding how far we have come with technology. One day, Maggie will be retired and the cure will be found. Things like immunotherapy are the future but for now…. it’s me and Maggie.”

Doherty also frequently posts about the effects of radiation, sharing the movement exercises she does to stay healthy. “Radiation is tiring. It builds up within you and sometimes one just struggles to keep their eyes open,” she wrote in the caption of a video of her dancing. “You can see how tired I am here but I’m still moving!! Any movement is so good during treatment, not just for the body, but for your mind as well.”

Read more at EW.com

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