Read first and then mind map... or record your notes avoid doing it as you read.
Using photoreading you still would be able to make notes on each page. During superreading and dipping you are forming the sentances for each page. As long as you understand the book they don't have to be done in order... they can go from easiest to more difficult to write a sentence for. If it's my book I'd be scrawling the sentences on each page and transfer them later to a notebook... coming back to the ones I had difficulty making notes on later.
In other words I'd be using the photoreading system to find what I know first and and make a summary of that, adding more and more with each of my activation passes. This way avoiding the stuggle of understanding immediately, allowing my inner mind some more time to process the stuff I find difficult to sumarise.
Alex