The film will be shown at AUB's summer show from 10 to 21 July and at Aberrations Collective's Show in Copeland Gallery, London, from 31 July to 3 August.
"To be told I had secondary breast cancer but my life can be extended, I think it's that hope you have to keep in your mind," said Ms Buchan from Barry, Vale of Glamorgan."I know that prior to the first line of treatment going down it was expected I'd live five or six years, maybe more.
"The way I cope with this is by thinking about today and today is a good day."Ms Buchan is among thousands in the UK and millions worldwide who could benefit from the drug."I think I'm really lucky because I've got the most supportive husband, children and their partners and extended family and wonderful friends.
"What this drug can do for me is allow me to see my son's wedding next year and to look into the future."Despite its approval for use globally by the US Food and Drug Administration (FDA) in 2023, capivasertib only became available to patients via the NHS in England and Wales this year.
Dr Simon Waters, consultant medical oncologist at Velindre Cancer Centre, said it was a "great opportunity now we've got to this point".
"People have been working on it for a long time. It's great we can now put it in to practice as a standard treatment," he said."I figured as well, because of the impact that all this has had on my mental health, I'd like to sort of strip away the stigma."
He said there were lingering elements of the railway industry being "male-oriented", which made it important to encourage people to talk about their mental health."I thought by doing this bold move, it'll gain people's interest, and it has really," he said.
"It's raised a lot of conversations, certainly with colleagues, talking about their own mental health stories, so in my eyes it's really worked."The route of the World Naked Bike Ride will see the pair cycle through some of London's busiest areas.