It is just a lap quilt intended for someone as they go through chemo. It does not need a particular pattern, color or fabric. I was part of a group making a bunch of blankees for those getting dialysis - these were crocheted and 45x60 was ideal. I would think a lap quilt of similar dimension would be perfect. Some prefer longer blankees, but it's pretty much a special request item. The two I donated are used only if the standard size blankee just isn't warm enough for someone. The rooms are kept cold for a couple of reasons - reduced bacteria growth, heat from the machines.
BTW, I do not make 'pink' quilts (or afghans). My Dad's cousin went through breast cancer treatment and chemo and was pinked to death. So, I feel free to use anything, but I try to have the final result be soothing rather than frenetic.