Operating instructions

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Head kernels
The VA70 provides three new kernels for head proto-
cols: H21, H31, H41.
The endings “s” or “f” depend on the rotation time.
They are comparable to H20, H30 or H40 with respect
to sharpness but they show a different granularity with
a finer image noise pattern. In general, the low con-
trast detectability benefits from a fine-grained noise.
The kernel H31 is set as default in all preset head
protocols for soft tissue evaluation.
For adapting the image sharpness, the kernels H21
(smoother) or H41 (sharper) might be used.
Body kernels
The VA70 provides two new kernels for body region
protocols: B31 and B41. The endings “s” or “f” depend
on the rotation time.
They are comparable to B30 or B40 concerning
sharpness but show a fine-grained noise, which gene-
rally improves low-contrast detectability In most of
the preset scan protocols the new kernels are used for
image reconstruction of soft tissue.