Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Signal analysis of impulse response functions in MR- and CT-measurements
  of cerebral blood flow   The impulse response function (IRF) of a localized bolus in cerebral blood
flow codes important information on the tissue type. It is indirectly
accessible both from MR- and CT-imaging methods, at least in principle. In
practice, however, noise and limited signal resolution render standard
deconvolution techniques almost useless. Parametric signal descriptions look
more promising, and it is the aim of this contribution to develop some
improvements along this line.

25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th