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Proceedings Paper

A high-resolution imaging technique using a whole-body, research photon counting detector CT system
Author(s): S. Leng; Z. Yu; A. Halaweish; S. Kappler; K. Hahn; A. Henning; Z. Li; J. Lane; D. L. Levin; S. Jorgensen; E. Ritman; C. McCollough
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Paper Abstract

A high-resolution (HR) data collection mode has been introduced to a whole-body, research photon-counting-detector CT system installed in our laboratory. In this mode, 64 rows of 0.45 mm x 0.45 mm detector pixels were used, which corresponded to a pixel size of 0.25 mm x 0.25 mm at the iso-center. Spatial resolution of this HR mode was quantified by measuring the MTF from a scan of a 50 micron wire phantom. An anthropomorphic lung phantom, cadaveric swine lung, temporal bone and heart specimens were scanned using the HR mode, and image quality was subjectively assessed by two experienced radiologists. High spatial resolution of the HR mode was evidenced by the MTF measurement, with 15 lp/cm and 20 lp/cm at 10% and 2% modulation. Images from anthropomorphic phantom and cadaveric specimens showed clear delineation of small structures, such as lung vessels, lung nodules, temporal bone structures, and coronary arteries. Temporal bone images showed critical anatomy (i.e. stapes superstructure) that was clearly visible in the PCD system. These results demonstrated the potential application of this imaging mode in lung, temporal bone, and vascular imaging. Other clinical applications that require high spatial resolution, such as musculoskeletal imaging, may also benefit from this high resolution mode.

Paper Details

Date Published: 25 March 2016
PDF: 6 pages
Proc. SPIE 9783, Medical Imaging 2016: Physics of Medical Imaging, 97831I (25 March 2016); doi: 10.1117/12.2217180
Show Author Affiliations
S. Leng, Mayo Clinic (United States)
Z. Yu, Mayo Clinic (United States)
A. Halaweish, Siemens Healthcare (United States)
S. Kappler, Siemens Healthcare (Germany)
K. Hahn, Siemens Healthcare (Germany)
A. Henning, Siemens Healthcare (Germany)
Z. Li, Mayo Clinic (United States)
J. Lane, Mayo Clinic (United States)
D. L. Levin, Mayo Clinic (United States)
S. Jorgensen, Mayo Clinic (United States)
E. Ritman, Mayo Clinic (United States)
C. McCollough, Mayo Clinic (United States)

Published in SPIE Proceedings Vol. 9783:
Medical Imaging 2016: Physics of Medical Imaging
Despina Kontos; Thomas G. Flohr, Editor(s)

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