Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Smartphone microendoscopy for high resolution fluorescence imaging   High resolution optical endoscopes are increasingly used in diagnosis of
various medical conditions of internal organs, such as the gastrointestinal
tracts, but they are too expensive for use in resource-poor settings. On the
other hand, smartphones with high resolution cameras and Internet access have
become more affordable, enabling them to diffuse into most rural areas and
developing countries in the past decade. In this letter we describe a
smartphone microendoscope that can take fluorescence images with a spatial
resolution of 3.1 {\mu}m. Images collected from ex vivo, in vitro and in vivo
samples using the device are also presented. The compact and cost-effective
smartphone microendoscope may be envisaged as a powerful tool for detecting
pre-cancerous lesions of internal organs in low and middle income countries.

29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg