Interpolated CT for attenuation correction on respiratory gating cardiac SPECT/CT - A simulation study.
attenuation correction
cardiac SPECT/CT
respiratory gating
Journal
Medical physics
ISSN: 2473-4209
Titre abrégé: Med Phys
Pays: United States
ID NLM: 0425746
Informations de publication
Date de publication:
Jun 2019
Jun 2019
Historique:
received:
19
09
2018
revised:
07
03
2019
accepted:
18
03
2019
pubmed:
30
3
2019
medline:
23
11
2019
entrez:
30
3
2019
Statut:
ppublish
Résumé
Respiratory gated four-dimensional (4D) single photon emission computed tomography (SPECT) with phase-matched CT reduces respiratory blurring and attenuation correction (AC) artifacts in cardiac SPECT. This study aims to develop and investigate the effectiveness of an interpolated CT (ICT) method for improved cardiac SPECT AC using simulations. We used the 4D XCAT phantom to simulate a population of ten patients varied in gender, anatomy, The average of maximum relative difference through ten phantoms was 7.93 ± 4.71%, 2.50 ± 0.98%, 3.58 ± 0.74%, and 2.14 ± 0.56% for noisy HCT-IN, HCT-MID, HCT-EX, and ICT AC data, respectively. The ICT showed closest defect size to GCT while the differences from HCTs can be over 40%. We conclude that the performance of ICT is similar to GCT. It improves the image quality and quantitative accuracy for respiratory-gated cardiac SPECT as compared to conventional HCT, while it can potentially further reduce the radiation dose of GCT.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
2621-2628Subventions
Organisme : National Natural Science Foundation of China
ID : 81601525
Organisme : Macau Science and Technology Development Fund
ID : 114/2016/A3
Organisme : University of Macau
ID : MYRG2016-00091-FST
Informations de copyright
© 2019 American Association of Physicists in Medicine.