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The lofthole: a novel shaped pinhole geometry for optimal detector usage without multiplexing and without additional shielding

Karel Deprez UGent, Roel Van Holen UGent and Stefaan Vandenberghe UGent (2011) IEEE Nuclear Science Symposium Conference Record. p.3317-3322
abstract
Multi-pinhole collimator based SPECT systems are nowadays used for pre-clinical and clinical imaging. Overlap of the different projections of the pinholes should generally be avoided. This can be done by either positioning the pinholes far from each other or by using additional shielding. The first method does not allow to use the detector area efficiently while the second method introduces additional cost, weight and design complexity. We investigate a new pinhole geometry, the lofthole, that has a circular aperture but whose entrance and/or exit opening is shaped by the desired irradiated detector area. The lofthole is designed using a ray-tracer and can be manufactured with traditional manufacturing techniques. A lofthole and two regular pinholes have been made in two tungsten-alloy plates. Production of these plates indicates that the manufacturing cost of a pinhole is roughly similar to the manufacturing cost of a lofthole. Measurements on the lofthole and pinhole plates show the rectangular projection of the lofthole versus the circular projection of the pinhole. Penetration measurements indicate that the lofthole has less penetration than a pinhole that irradiates the same detector area.
Please use this url to cite or link to this publication:
author
organization
year
type
conference
publication status
published
subject
keyword
BRAIN SPECT, RESOLUTION, SMALL-ANIMAL SPECT, SIMULATION, SYSTEM, Pinhole, SPECT, Collimator
in
IEEE Nuclear Science Symposium Conference Record
issue title
2011 IEEE Nuclear science symposium and medical imaging conference (NSS/MIC)
pages
3317 - 3322
publisher
IEEE
place of publication
Piscataway, NJ, USA
conference name
2011 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC 2011)
conference location
Valencia, Spain
conference start
2011-10-23
conference end
2011-10-29
Web of Science type
Proceedings Paper
Web of Science id
000304755603123
ISSN
1082-3654
ISBN
9781467301183
DOI
10.1109/NSSMIC.2011.6152599
language
English
UGent publication?
yes
classification
P1
copyright statement
I have transferred the copyright for this publication to the publisher
id
2140542
handle
http://hdl.handle.net/1854/LU-2140542
date created
2012-06-12 13:19:43
date last changed
2013-02-19 15:29:01
@inproceedings{2140542,
  abstract     = {Multi-pinhole collimator based SPECT systems are nowadays used for pre-clinical and clinical imaging. Overlap of the different projections of the pinholes should generally be avoided. This can be done by either positioning the pinholes far from each other or by using additional shielding. The first method does not allow to use the detector area efficiently while the second method introduces additional cost, weight and design complexity. We investigate a new pinhole geometry, the lofthole, that has a circular aperture but whose entrance and/or exit opening is shaped by the desired irradiated detector area. The lofthole is designed using a ray-tracer and can be manufactured with traditional manufacturing techniques. A lofthole and two regular pinholes have been made in two tungsten-alloy plates. Production of these plates indicates that the manufacturing cost of a pinhole is roughly similar to the manufacturing cost of a lofthole. Measurements on the lofthole and pinhole plates show the rectangular projection of the lofthole versus the circular projection of the pinhole. Penetration measurements indicate that the lofthole has less penetration than a pinhole that irradiates the same detector area.},
  author       = {Deprez, Karel and Van Holen, Roel and Vandenberghe, Stefaan},
  booktitle    = {IEEE Nuclear Science Symposium Conference Record},
  isbn         = {9781467301183},
  issn         = {1082-3654},
  keyword      = {BRAIN SPECT,RESOLUTION,SMALL-ANIMAL SPECT,SIMULATION,SYSTEM,Pinhole,SPECT,Collimator},
  language     = {eng},
  location     = {Valencia, Spain},
  pages        = {3317--3322},
  publisher    = {IEEE},
  title        = {The lofthole: a novel shaped pinhole geometry for optimal detector usage without multiplexing and without additional shielding},
  url          = {http://dx.doi.org/10.1109/NSSMIC.2011.6152599},
  year         = {2011},
}

Chicago
Deprez, Karel, Roel Van Holen, and Stefaan Vandenberghe. 2011. “The Lofthole: a Novel Shaped Pinhole Geometry for Optimal Detector Usage Without Multiplexing and Without Additional Shielding.” In IEEE Nuclear Science Symposium Conference Record, 3317–3322. Piscataway, NJ, USA: IEEE.
APA
Deprez, K., Van Holen, R., & Vandenberghe, S. (2011). The lofthole: a novel shaped pinhole geometry for optimal detector usage without multiplexing and without additional shielding. IEEE Nuclear Science Symposium Conference Record (pp. 3317–3322). Presented at the 2011 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC 2011), Piscataway, NJ, USA: IEEE.
Vancouver
1.
Deprez K, Van Holen R, Vandenberghe S. The lofthole: a novel shaped pinhole geometry for optimal detector usage without multiplexing and without additional shielding. IEEE Nuclear Science Symposium Conference Record. Piscataway, NJ, USA: IEEE; 2011. p. 3317–22.
MLA
Deprez, Karel, Roel Van Holen, and Stefaan Vandenberghe. “The Lofthole: a Novel Shaped Pinhole Geometry for Optimal Detector Usage Without Multiplexing and Without Additional Shielding.” IEEE Nuclear Science Symposium Conference Record. Piscataway, NJ, USA: IEEE, 2011. 3317–3322. Print.