Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A New 3D Method to Segment the Lumbar Vertebral Bodies and to Determine
  Bone Mineral Density and Geometry   In this paper we present a new 3D segmentation approach for the vertebrae of
the lower thoracic and the lumbar spine in spiral computed tomography datasets.
We implemented a multi-step procedure. Its main components are deformable
models, volume growing, and morphological operations. The performance analysis
that included an evaluation of accuracy using the European Spine Phantom, and
of intra-operator precision using clinical CT datasets from 10 patients
highlight the potential for clinical use. The intra-operator precision of the
segmentation procedure was better than 1% for Bone Mineral Density (BMD) and
better than 1.8% for volume. The long-term goal of this work is to enable
better fracture prediction and improved patient monitoring in the field of
osteoporosis. A true 3D segmentation also enables an accurate measurement of
geometrical parameters that can augment the classical measurement of BMD.

27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph