The Lodox Statscan system (Fig. 1) utilizes an X-ray fan beam and employs linear slot-scanning radiography [1]. To precisely expose the region of interest with X-rays during scanning, the beam-width is collimated with sliders, driven on a toothed belt by servo motors, thereby adjusting the size of the slot through which the X-ray beam is transmitted. However, these sliders sometimes stall during horizontal C-arm scanning because of the effect of gravity and also often stop abruptly when they reach end of travel, which can damage the motors, the belt, or the sliders. Furthermore in the event of abrupt power supply loss while scanning, the current mechanism needs to be reinitialized in order to relocate the position of the beam-limiter blocks. The aim was therefore to develop an alternative X-ray beam-width limiting mechanism that is more reliable in both vertical and horizontal orientations,...

References

References
1.
Irving
,
B. J.
,
Maree
,
G. J.
,
Hering
,
E. R.
, and
Douglas
,
T. S.
,
2008
, “
Radiation Dose From a Linear Slit Scanning X-Ray Machine With Full-Body Imaging Capabilities
,”
Radiat. Prot. Dosim.
,
130
(
4
), pp.
482
489
.
2.
Hubbell
,
J. H.
,
1999
, “
Review of Photon Interaction Cross Section Data in the Medical and Biological Context
,”
Phys. Med. Biol.
,
44
(
1
), pp.
R1
R22
.
3.
Chu
,
C. Y.
,
Xu
,
J. Y.
, and
Lan
,
C. C.
,
2014
, “
Design and Experiment of a Compact Wrist Mechanism With High Torque Density
,”
Mech. Mach. Theory
,
78
(
1
), pp.
65
80
.
4.
Takinoue
,
M.
,
Atsumi
,
Y.
, and
Yoshikawa
,
K.
,
2010
, “
Rotary Motion Driven by a Direct Current Electric Field
,”
Appl. Phys. Lett.
,
96
(
10
), pp.
25
28
.
5.
Leonard
,
J. J.
, and
Durrant-Whyte
,
H. F.
,
1992
,
Directed Sonar Sensing for Mobile Robot Navigation
,
Springer
,
New York
.
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