Title:
ＰＥＴの偶発同時計数補正
Document Type and Number:
Japanese Patent JP6670253
Kind Code:
B2
Abstract:
A positron emission tomography (PET) imaging system (10) includes a singles unit (24), a delay unit (26), a scaling unit (28), and a reconstruction unit (30). The singles unit (24) is configured to generate a correction sinogram of random coincidences defined by a coincidence time window tw and a time period t based on rij=2 t si sj where rij is an estimate of the random coincidences in the time period t between singles at detector locations si and sj. The delay unit (26) is configured to determine delay coincidences in the time period t defined by a delay coincidence time window of a paired coincidences including tw to 2 tw. The scaling unit (28) is configured to scale the correction sinogram of random coincidences based on the delay coincidences. The reconstruction unit (30) is configured to iteratively reconstruct one or more images based on the scaled random sinogram and a prompt sinogram for the time period t.
Inventors:
Ye Jin Han
Song Shiyun
Song Shiyun
Application Number:
JP2016563789A
Publication Date:
March 18, 2020
Filing Date:
April 23, 2015
Export Citation:
Assignee:
KONINKLIJKE PHILIPS N.V.
International Classes:
G01T1/161; G01T1/172
Domestic Patent References:
| JP2008190901A |
Foreign References:
| US20090072154 | ||||
| US20060083415 |
Other References:
David Brasse et al.,"Correction Methods for Random Coincidences in Fully 3D Whole-Body PET: Impact on Data and Image Quality",The Journal of NUCLEAR MEDICINE,2005年,vol.46,pp.859-867
Attorney, Agent or Firm:
Patent Services Corporation m&s Partners