Image quality and dose assessment of collimator slit width effect in SLOT-SCAN X-ray imaging system.
DQE
Gate simulation
Image quality
Slot-scan imaging system
Journal
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine
ISSN: 1872-9800
Titre abrégé: Appl Radiat Isot
Pays: England
ID NLM: 9306253
Informations de publication
Date de publication:
May 2021
May 2021
Historique:
received:
12
08
2020
revised:
07
02
2021
accepted:
11
02
2021
pubmed:
26
2
2021
medline:
18
11
2021
entrez:
25
2
2021
Statut:
ppublish
Résumé
The effect of collimator slit width on patient absorbed dose and image quality is evaluated in the SLOT-SCAN imaging system. For this purpose, GATE Monte-Carlo code was used for simulation. To determine contrast to noise ratio (CNR), copper filters with different thicknesses were used and a 2mm lead filter was applied for the determination of the Modulation Transfer Function (MTF) and Detective Quantum Efficiency (DQE). Spatial resolution was determined by using line-pairs per millimeter test. In addition, the anthropomorphic digital Zubal phantom was used to estimate the patient absorbed dose. As the results showed, the CNR shows 77% reduction by decreasing the collimator slit width from 4 mm to 0.4 mm. Other parameters such as DQE and spatial resolution showed to be constant. Finally, whole-body patient absorbed dose estimation resulted in reduction of 14 times using the 0.4 mm collimator slit. The results showed that decreasing the slit width reduced the patient absorbed dose without any significant change in the image quality.
Identifiants
pubmed: 33631503
pii: S0969-8043(21)00054-3
doi: 10.1016/j.apradiso.2021.109642
pii:
doi:
Types de publication
Letter
Langues
eng
Sous-ensembles de citation
IM
Pagination
109642Informations de copyright
Copyright © 2021 Elsevier Ltd. All rights reserved.