3D scan

Ka
I'm thinking of getting a 3D scan soon (I'm 26+4 now), and I have a high BMI with a lot of weight around my belly! I'm about a size 20/22.. Just wondering if anyone else has had one at a similar size, and if it worked well? Some people said to me that the bigger you are, the less clear they come out, and it was pointless going for one if you're very overweight!! :(