Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamic fluence map sequencing using piecewise linear leaf position
  functions   Within the setting of intensity modulated radiation therapy (IMRT) and the
fully continuous version of IMRT called volumetric modulated radiation therapy
(VMAT), we consider the problem of matching a given fluence map as well as
possible in limited time by the use of a linear accelerator (linac) with a
multi-leaf collimator (MLC). We introduce two modeling strategies to manage the
nonconvexity and the associated local minima of this problem. The first is the
use of linear splines to model the MLC leaf positions as functions of time. The
second is a progressively controllable smooth model (instead of a step
function) of how the leaves block the fluence radiation. We propose a two part
solution: an outer loop that optimizes the dose rate pattern over time, and an
inner loop that given a dose rate pattern optimizes the leaf trajectories.

14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph