Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superconducting receiver arrays for magnetic resonance imaging   Superconducting QUantum-Interference Devices (SQUIDs) make magnetic resonance
imaging (MRI) possible in ultra-low microtesla-range magnetic fields. In this
work, we investigate the design parameters affecting the signal and noise
performance of SQUID-based sensors and multichannel magnetometers for MRI of
the brain. Besides sensor intrinsics, various noise sources along with the
size, geometry and number of superconducting detector coils are important
factors affecting the image quality. We derive figures of merit based on
optimal combination of multichannel data, analyze different sensor array
designs, and provide tools for understanding the signal detection and the
different noise mechanisms. The work forms a guide to making design decisions
for both imagingand sensor-oriented readers.

28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int