How would you manage a patient with a h/o HSIL & VAIN3 and recent colposcopic vaginal biopsies "highly concerning for exophytic pattern squamous cell carcinoma" refusing vaginectomy?

I have treated with image guided brachy. I use MRI for planning and a multichannel cylinder. Our dose is 6Gy x 5 or 7Gy x 5 prescribed to thickness of vagina seen on MRI, (varies across length) respecting doses to critical organs.