Shape estimation of bowtie filters based on the luminescence from polyethylene terephthalate resin by x-ray irradiation

C. Yamauchi-Kawaura; K. Fujii; M. Yamauchi; S. Yamamoto; M. Kozuka; N. Ohzawa; N. Suga; N. Ito

doi:10.1093/rpd/ncz031

Shape estimation of bowtie filters based on the luminescence from polyethylene terephthalate resin by x-ray irradiation

C. Yamauchi-Kawaura^*, K. Fujii, M. Yamauchi, S. Yamamoto, M. Kozuka, N. Ohzawa, N. Suga, N. Ito

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

In this study, we devised a novel method estimating the bowtie filter shapes by imaging luminescence from a polyethylene terephthalate (PET) resin with X-ray irradiation in a computed tomography (CT) scanner. The luminescence distribution of the PET resin corresponding to the thickness of bowtie filter was imaged using a charge-coupled device camera. On the assumption that the material of bowtie filter is aluminium (Al), the shape of bowtie filters was estimated from the correlation between Al attenuation curves and the angular-dependent luminance attenuation profiles according to the thickness of bowtie filters. Dose simulations based on the estimated bowtie filter shapes were performed using head and body PMMA phantoms with 16 and 32 cm in diameter. The simulated values of head and body weighted CT dose index (CTDI_w) based on bowtie filter shape by the luminescence imaging method agreed within ∼9% with the measured values by a dosemeter.

Original language	English
Pages (from-to)	432-439
Number of pages	8
Journal	Radiation Protection Dosimetry
Volume	185
Issue number	4
DOIs	https://doi.org/10.1093/rpd/ncz031
Publication status	Published - 2019 Dec 31
Externally published	Yes

ASJC Scopus subject areas

Radiation
Radiological and Ultrasound Technology
Radiology Nuclear Medicine and imaging
Public Health, Environmental and Occupational Health

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1093/rpd/ncz031

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title = "Shape estimation of bowtie filters based on the luminescence from polyethylene terephthalate resin by x-ray irradiation",

abstract = "In this study, we devised a novel method estimating the bowtie filter shapes by imaging luminescence from a polyethylene terephthalate (PET) resin with X-ray irradiation in a computed tomography (CT) scanner. The luminescence distribution of the PET resin corresponding to the thickness of bowtie filter was imaged using a charge-coupled device camera. On the assumption that the material of bowtie filter is aluminium (Al), the shape of bowtie filters was estimated from the correlation between Al attenuation curves and the angular-dependent luminance attenuation profiles according to the thickness of bowtie filters. Dose simulations based on the estimated bowtie filter shapes were performed using head and body PMMA phantoms with 16 and 32 cm in diameter. The simulated values of head and body weighted CT dose index (CTDIw) based on bowtie filter shape by the luminescence imaging method agreed within ∼9% with the measured values by a dosemeter.",

author = "C. Yamauchi-Kawaura and K. Fujii and M. Yamauchi and S. Yamamoto and M. Kozuka and N. Ohzawa and N. Suga and N. Ito",

note = "Funding Information: This work was supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI (Grant number JP16K09014). Publisher Copyright: {\textcopyright} 2019 The Author(s).",

year = "2019",

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doi = "10.1093/rpd/ncz031",

language = "English",

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T1 - Shape estimation of bowtie filters based on the luminescence from polyethylene terephthalate resin by x-ray irradiation

AU - Yamauchi-Kawaura, C.

AU - Fujii, K.

AU - Yamauchi, M.

AU - Yamamoto, S.

AU - Kozuka, M.

AU - Ohzawa, N.

AU - Suga, N.

AU - Ito, N.

PY - 2019/12/31

Y1 - 2019/12/31

N2 - In this study, we devised a novel method estimating the bowtie filter shapes by imaging luminescence from a polyethylene terephthalate (PET) resin with X-ray irradiation in a computed tomography (CT) scanner. The luminescence distribution of the PET resin corresponding to the thickness of bowtie filter was imaged using a charge-coupled device camera. On the assumption that the material of bowtie filter is aluminium (Al), the shape of bowtie filters was estimated from the correlation between Al attenuation curves and the angular-dependent luminance attenuation profiles according to the thickness of bowtie filters. Dose simulations based on the estimated bowtie filter shapes were performed using head and body PMMA phantoms with 16 and 32 cm in diameter. The simulated values of head and body weighted CT dose index (CTDIw) based on bowtie filter shape by the luminescence imaging method agreed within ∼9% with the measured values by a dosemeter.

AB - In this study, we devised a novel method estimating the bowtie filter shapes by imaging luminescence from a polyethylene terephthalate (PET) resin with X-ray irradiation in a computed tomography (CT) scanner. The luminescence distribution of the PET resin corresponding to the thickness of bowtie filter was imaged using a charge-coupled device camera. On the assumption that the material of bowtie filter is aluminium (Al), the shape of bowtie filters was estimated from the correlation between Al attenuation curves and the angular-dependent luminance attenuation profiles according to the thickness of bowtie filters. Dose simulations based on the estimated bowtie filter shapes were performed using head and body PMMA phantoms with 16 and 32 cm in diameter. The simulated values of head and body weighted CT dose index (CTDIw) based on bowtie filter shape by the luminescence imaging method agreed within ∼9% with the measured values by a dosemeter.

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JF - Radiation Protection Dosimetry

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ER -

Shape estimation of bowtie filters based on the luminescence from polyethylene terephthalate resin by x-ray irradiation

Abstract

ASJC Scopus subject areas

UN SDGs

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