dands wrote: The tester said that the only way to determine levels of visceral fat was through an MRI scan and of course we don't want to irradiate him unnecessarily. The test was performed at the University of Westminster.
I guessed it was Uni. of Westminster and it sounds like the same chap - in which case, I can only say that he has a short memory

And, it's interesting that he has again made those comments in defence of his readings as tho' x3 is unusual as opposed to standard practice.
Yes, MRI* or a body volumetric scan would be good but they're virtually unobtainable for the general public in the UK (I will spare you my usual Public Health rant on this topic). You can get a good reading as to your visceral/abdominal fat by having a Dxa - but you need to choose the provider wisely and be prepared to drill down as to what they include in the report. Dxa is available but eye-wateringly expensive.
I will say that that chap gave me a by rote warning about visceral fat tho' I had a waist of <26 inches at that time. Bizarre and outlying as my results are, I never did believe it was visceral fat as it would have need to have been very oddly distributed. As it turns out, I was correct but I am an outlier, and it's not that odd for a woman to have more subcutaneous fat. Plus, I don't (nor did I then) have high BP or other biomarkers of metabolic syndrome etc.
I do wonder if this is part of his genetic inheritance as his mother has high blood pressure and he already has familial high cholesterol
Absolutely none of my business and there's no need to respond but if you mean that your DH has familial hypercholesterolemia then I hope that he is receiving appropriate guidance. (If you don't mean familial hypercholesterolemia then ignore this.)
*NB: if he mentioned MRI and radiation then he mis-spoke as MRI uses strong magnets, not ionising radiation, to produce the images. I will say that MRI provides very pretty slices at designated areas to give a good volume approximation of fat distribution but then you'd have to pick where you think the VF might be located - e.g., liver, spleen, kidneys, lower abdomen etc. etc.