Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multigap RPC for PET: development and optimisation of the detector
  design   Transforming the resistive plate chambers from charged-particle into
gamma-quanta detectors opens the way towards their application as a basic
element of a hybrid imaging system, which combines positron emission tomography
(PET) with magnetic resonance imaging (MRI) in a single device and provides
non- and minimally- invasive quantitative methods for diagnostics. To this end,
we performed detailed investigations encompassing the whole chain from the
annihilation of the positron in the body, through the conversion of the created
photons into electrons and to the optimization of the electron yield in the
gas. GEANT4 based simulations of the efficiency of the RPC photon detectors
with different converter materials and geometry were conducted for optimization
of the detector design. The results justify the selection of a sandwich-type
gas-insulator-converter design, with Bi or Pb as converter materials.

14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat