A comprehensive assessment of a prototype high ratio antiscatter grid in interventional cardiology using experimental measurements and Monte Carlo simulations
To assess the performance of a new antiscatter grid design in interventional cardiology for image quality improvement and dose reduction using experimental measurements and Monte Carlo (MC) simulation. Approach: Experimental measurements were performed on an angiography system, using a multi-layered...
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Published in | Physics in medicine & biology Vol. 69; no. 13; pp. 135015 - 135034 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
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IOP Publishing
07.07.2024
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Abstract | To assess the performance of a new antiscatter grid design in interventional cardiology for image quality improvement and dose reduction using experimental measurements and Monte Carlo (MC) simulation. Approach: Experimental measurements were performed on an angiography system, using a multi-layered tissue simulating composite phantom made from of poly(methyl methacrylate), aluminium and expanded polystyrene (2/0.2/0.7 cm). The total phantom thickness ranged from 20.3 cm to 40.6 cm. Four conditions were compared; (A) 105 cm source-image receptor distance (SID) without grid, (B
) 105 cm SID with grid ratio (r) and strip density (N) (r15N80), (B
) 120 cm SID without grid, and (B
) 120 cm SID with high ratio grid (r29N80). The system efficiency (η), defined by the signal-to-noise ratio, was compared from the B conditions against case A. These conditions were also simulated with MC techniques, allowing additional phantom compositions to be explored. Weighted image quality improvement factor (η
(u)) was studied experimentally at a specific spatial frequency due to the SID change. Images were simulated with an anthropomorphic chest phantom for the different conditions, and the system efficiency was compared for the different anatomical regions. Main results: Good agreement was found between the η and η
(u) methods using both measured and simulated data, with average relative differences between 2% to 11%. Case B
provided higher η values compared to A, and B
for thicknesses larger than 20.3 cm. In addition, case B
also provided higher η values for high attenuating areas in the anthropomorphic phantom, such as behind the spine. Significance: The new antiscatter grid design provided higher system efficiency compared to the standard grid for the parameters explored in this work. 
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AbstractList | Objective . To assess the performance of a new antiscatter grid design in interventional cardiology for image quality improvement and dose reduction using experimental measurements and Monte Carlo (MC) simulation. Approach. Experimental measurements were performed on an angiography system, using a multi-layered tissue simulating composite phantom made from of poly(methyl methacrylate), aluminium and expanded polystyrene (2/0.2/0.7 cm). The total phantom thickness ranged from 20.3 cm to 40.6 cm. Four conditions were compared; (A) 105 cm source-image receptor distance (SID) without grid, ( B i ) 105 cm SID with grid ratio ( r ) and strip density ( N ) ( r 15 N 80), ( B ii ) 120 cm SID without grid, and (B iii ) 120 cm SID with high ratio grid ( r 29 N 80). The system efficiency ( η ), defined by the signal-to-noise ratio, was compared from the B conditions against case A . These conditions were also simulated with MC techniques, allowing additional phantom compositions to be explored. Weighted image quality improvement factor ( η w ( u )) was studied experimentally at a specific spatial frequency due to the SID change. Images were simulated with an anthropomorphic chest phantom for the different conditions, and the system efficiency was compared for the different anatomical regions. Main results. Good agreement was found between the η and η w ( u ) methods using both measured and simulated data, with average relative differences between 2%–11%. Case B iii provided higher η values compared to A , and B i for thicknesses larger than 20.3 cm. In addition, case B iii also provided higher η values for high attenuating areas in the anthropomorphic phantom, such as behind the spine. Significance. The new antiscatter grid design provided higher system efficiency compared to the standard grid for the parameters explored in this work. To assess the performance of a new antiscatter grid design in interventional cardiology for image quality improvement and dose reduction using experimental measurements and Monte Carlo (MC) simulation. Approach: Experimental measurements were performed on an angiography system, using a multi-layered tissue simulating composite phantom made from of poly(methyl methacrylate), aluminium and expanded polystyrene (2/0.2/0.7 cm). The total phantom thickness ranged from 20.3 cm to 40.6 cm. Four conditions were compared; (A) 105 cm source-image receptor distance (SID) without grid, (B ) 105 cm SID with grid ratio (r) and strip density (N) (r15N80), (B ) 120 cm SID without grid, and (B ) 120 cm SID with high ratio grid (r29N80). The system efficiency (η), defined by the signal-to-noise ratio, was compared from the B conditions against case A. These conditions were also simulated with MC techniques, allowing additional phantom compositions to be explored. Weighted image quality improvement factor (η (u)) was studied experimentally at a specific spatial frequency due to the SID change. Images were simulated with an anthropomorphic chest phantom for the different conditions, and the system efficiency was compared for the different anatomical regions. Main results: Good agreement was found between the η and η (u) methods using both measured and simulated data, with average relative differences between 2% to 11%. Case B provided higher η values compared to A, and B for thicknesses larger than 20.3 cm. In addition, case B also provided higher η values for high attenuating areas in the anthropomorphic phantom, such as behind the spine. Significance: The new antiscatter grid design provided higher system efficiency compared to the standard grid for the parameters explored in this work. 
. Objective. To assess the performance of a new antiscatter grid design in interventional cardiology for image quality improvement and dose reduction using experimental measurements and Monte Carlo (MC) simulation.Approach.Experimental measurements were performed on an angiography system, using a multi-layered tissue simulating composite phantom made from of poly(methyl methacrylate), aluminium and expanded polystyrene (2/0.2/0.7 cm). The total phantom thickness ranged from 20.3 cm to 40.6 cm. Four conditions were compared; (A) 105 cm source-image receptor distance (SID) without grid, (Bi) 105 cm SID with grid ratio (r) and strip density (N) (r15N80), (Bii) 120 cm SID without grid, and (Biii) 120 cm SID with high ratio grid (r29N80). The system efficiency (η), defined by the signal-to-noise ratio, was compared from theBconditions against caseA. These conditions were also simulated with MC techniques, allowing additional phantom compositions to be explored. Weighted image quality improvement factor (ηw(u)) was studied experimentally at a specific spatial frequency due to the SID change. Images were simulated with an anthropomorphic chest phantom for the different conditions, and the system efficiency was compared for the different anatomical regions.Main results.Good agreement was found between theηandηw(u) methods using both measured and simulated data, with average relative differences between 2%-11%. CaseBiiiprovided higherηvalues compared toA, andBifor thicknesses larger than 20.3 cm. In addition, caseBiiialso provided higherηvalues for high attenuating areas in the anthropomorphic phantom, such as behind the spine.Significance.The new antiscatter grid design provided higher system efficiency compared to the standard grid for the parameters explored in this work.Objective. To assess the performance of a new antiscatter grid design in interventional cardiology for image quality improvement and dose reduction using experimental measurements and Monte Carlo (MC) simulation.Approach.Experimental measurements were performed on an angiography system, using a multi-layered tissue simulating composite phantom made from of poly(methyl methacrylate), aluminium and expanded polystyrene (2/0.2/0.7 cm). The total phantom thickness ranged from 20.3 cm to 40.6 cm. Four conditions were compared; (A) 105 cm source-image receptor distance (SID) without grid, (Bi) 105 cm SID with grid ratio (r) and strip density (N) (r15N80), (Bii) 120 cm SID without grid, and (Biii) 120 cm SID with high ratio grid (r29N80). The system efficiency (η), defined by the signal-to-noise ratio, was compared from theBconditions against caseA. These conditions were also simulated with MC techniques, allowing additional phantom compositions to be explored. Weighted image quality improvement factor (ηw(u)) was studied experimentally at a specific spatial frequency due to the SID change. Images were simulated with an anthropomorphic chest phantom for the different conditions, and the system efficiency was compared for the different anatomical regions.Main results.Good agreement was found between theηandηw(u) methods using both measured and simulated data, with average relative differences between 2%-11%. CaseBiiiprovided higherηvalues compared toA, andBifor thicknesses larger than 20.3 cm. In addition, caseBiiialso provided higherηvalues for high attenuating areas in the anthropomorphic phantom, such as behind the spine.Significance.The new antiscatter grid design provided higher system efficiency compared to the standard grid for the parameters explored in this work. |
Author | Dehairs, Michiel Verhoeven, Hannelore Bosmans, Hilde Marshall, Nicholas Massera, Rodrigo T |
Author_xml | – sequence: 1 givenname: Rodrigo T orcidid: 0000-0002-9078-080X surname: Massera fullname: Massera, Rodrigo T organization: Medical Imaging Research Centre, Medical Physics and Quality Assessment , KU Leuven, 3000 Leuven, Belgium – sequence: 2 givenname: Michiel surname: Dehairs fullname: Dehairs, Michiel organization: Institute Jules Bordet Instituut Department of Medical Physics, Rue Meylemeersch 90, Bruxelles 1070, Belgium – sequence: 3 givenname: Hannelore surname: Verhoeven fullname: Verhoeven, Hannelore organization: Competentiecentrum medische stralingsfysica, UZ Gasthuisberg , Herestraat 49, 3000 Leuven, Belgium – sequence: 4 givenname: Hilde surname: Bosmans fullname: Bosmans, Hilde organization: Competentiecentrum medische stralingsfysica, UZ Gasthuisberg , Herestraat 49, 3000 Leuven, Belgium – sequence: 5 givenname: Nicholas orcidid: 0000-0001-5549-5133 surname: Marshall fullname: Marshall, Nicholas organization: Competentiecentrum medische stralingsfysica, UZ Gasthuisberg , Herestraat 49, 3000 Leuven, Belgium |
BackLink | https://www.ncbi.nlm.nih.gov/pubmed/38862002$$D View this record in MEDLINE/PubMed |
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Keywords | interventional cardiology Antiscatter grid Monte Carlo simulation |
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Snippet | To assess the performance of a new antiscatter grid design in interventional cardiology for image quality improvement and dose reduction using experimental... Objective . To assess the performance of a new antiscatter grid design in interventional cardiology for image quality improvement and dose reduction using... Objective. To assess the performance of a new antiscatter grid design in interventional cardiology for image quality improvement and dose reduction using... |
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Title | A comprehensive assessment of a prototype high ratio antiscatter grid in interventional cardiology using experimental measurements and Monte Carlo simulations |
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