CBCT Scanners: Understanding Low-Contrast Detectability?
Anon. asks:
I recently had a debate with a company that will only endorse the i-CAT CBVT scanner. Their rep told me that all other scanners including the one I have is not good enough to produce accurate surgical guides. I’d like to get some feedback from others on this issue.
This is exactly what he wrote to me:
“Almost all CBCT scanners (including the i-CAT) offer a range of voxel sizes (from 0.125mm to 0.4mm in the case of the i-CAT) but we find that low-contrast detectability is more important when planning implants as it makes it easier to see low-contrast structures such as the ID nerve and also makes the bone crest stand out better from the surrounding tissue. The low-contrast detectability is largely due to the detector system which in the case of the i-CAT is an amorphous silicon flat panel with 14-bit resolution.”
Basically, he says that no other CBCT scanner has the low contrast silica detector system of the i-CAT system. Does this mean the only the I-CAT can visualise the IDN and crestal bone? Wondering if someone could shed light on these comments for me. I actually have an E-WOO Technology Picasso CBCT scanner with 0.2mm slice resolution, and my images are clearer and have higher resolution. So I’m wondering what’s going here?