Operating instructions

550
Children
Head Kernels
The endings “s” or “f” depend on the rotation time.
• For head scans of small children, the kernels C20s,
C30s (e.g. for soft tissue studies) and C60s (e.g. for
sinuses are provided) should be chosen instead of
the ”adult” head kernels H20s, H30s and H60s.
• For soft tissue head studies, the standard kernel is
H40s; softer images are obtained with H30s or H20s,
H10s, sharper images with H50s. The kernels H21s,
H31s, H41s yield the same visual sharpness as H20s,
H30s, H40s, the image appearance, however, is
more agreeable due to a ”fine-grained” noise struc-
ture; quite often, the low contrast detectability is
improved by using H31s, H 41s instead of H30s,
H40s.
• For the standard head protocols, we propose C20s
and C30s.
• High resolution head studies should be performed
with H60s, H70s (e.g. for dental and sinuses) and
H80s, H90s (e.g. inner ear).