Title:
SCATTERING ESTIMATION METHOD, SCATTERING ESTIMATION PROGRAM, AND POSITRON CT DEVICE HAVING SAME INSTALLED THEREON
Document Type and Number:
WIPO Patent Application WO/2018/163362
Kind Code:
A1
Abstract:
In the scattering estimation method of the present invention, step S1 (first TOF projection data creation) and step S4 (non-TOF scattering estimation algorithm) are performed, step S2 (second TOF projection data creation) and step S3 (calculation of TOF direction distribution ratio) are performed, and step S5 (calculation of TOF scattering projection data) is performed. A distribution ratio is obtained from second TOF projection data measured in a scattering beam energy window (low energy window), and since the distribution target is non-TOF scattering projection data in a reconstruction data energy window (normal energy window), post-distribution TOF scattering projection data is approximately obtained as TOF scattering projection data in the reconstruction data energy window (normal energy window), and scattering can be accurately estimated.
Inventors:
KOBAYASHI TETSUYA (JP)
Application Number:
PCT/JP2017/009531
Publication Date:
September 13, 2018
Filing Date:
March 09, 2017
Export Citation:
Assignee:
SHIMADZU CORP (JP)
International Classes:
G01T1/161
Domestic Patent References:
| WO2013175352A1 | 2013-11-28 |
Foreign References:
| JP2015145828A | 2015-08-13 | |||
| JP2013234995A | 2013-11-21 | |||
| JP2005249806A | 2005-09-15 | |||
| US7129496B2 | 2006-10-31 | |||
| US7397035B2 | 2008-07-08 | |||
| US8265365B2 | 2012-09-11 | |||
| US8809791B2 | 2014-08-19 |
Other References:
X. JIN ET AL.: "List-mode reconstruction for the Biograph mCT with physics modeling and event- by-event motion correction", PHYS. MED. BIOL., vol. 8, no. 16, 5 August 2013 (2013-08-05), pages 5567 - 5591, XP020249102
M. IATROU ET AL.: "Nuclear Science Symposium Conference Record", vol. 5, 2007, IEEE, article "Comparison of two 3D implementations of TOF scatter estimation in 3D PET", pages: 3474 - 3477
C. WATSON: "Extension of Single Scatter Simulation to Scatter Correction of Time-of-Flight PET", IEEE TRANSACTIONS ON NUCLEAR SCIENCE, vol. 54, no. 5, 2007, pages 1679 - 1686, XP011194173, doi:10.1109/TNS.2007.901227
X. JIN ET AL.: "List-mode reconstruction for the Biograph mCT with physics modeling and event-by-event motion correction", PHYS. MED. BIOL., vol. 58, 2013, pages 5567 - 5591, XP020249102, doi:10.1088/0031-9155/58/16/5567
S GROOTOONK ET AL.: "Correction for scatter in scatter 3D brain PET using a dual energy window method", PHYS. MED. BIOL., vol. 41, 1996, pages 2757 - 2774
X JIN ET AL.: "List-mode reconstruction for the biograph mCT with physics modeling and event-by-event motion correction", PHYS. MED. BIOL., vol. 58, 2013, pages 5567 - 5591, XP020249102, doi:10.1088/0031-9155/58/16/5567
M. IATROU ET AL.: "Nuclear Science Symposium Conference Record", vol. 5, 2007, IEEE, article "Comparison of two 3D implementations of TOF scatter estimation in 3D PET", pages: 3474 - 3477
C. WATSON: "Extension of Single Scatter Simulation to Scatter Correction of Time-of-Flight PET", IEEE TRANSACTIONS ON NUCLEAR SCIENCE, vol. 54, no. 5, 2007, pages 1679 - 1686, XP011194173, doi:10.1109/TNS.2007.901227
X. JIN ET AL.: "List-mode reconstruction for the Biograph mCT with physics modeling and event-by-event motion correction", PHYS. MED. BIOL., vol. 58, 2013, pages 5567 - 5591, XP020249102, doi:10.1088/0031-9155/58/16/5567
S GROOTOONK ET AL.: "Correction for scatter in scatter 3D brain PET using a dual energy window method", PHYS. MED. BIOL., vol. 41, 1996, pages 2757 - 2774
X JIN ET AL.: "List-mode reconstruction for the biograph mCT with physics modeling and event-by-event motion correction", PHYS. MED. BIOL., vol. 58, 2013, pages 5567 - 5591, XP020249102, doi:10.1088/0031-9155/58/16/5567
Attorney, Agent or Firm:
SUGITANI Tsutomu (JP)
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