Attenuation properties of common 3D printed FFF plastics for mammographic applications

Oliveira, Marcus; Savi, Matheus Brum Marques Bianchi; Andrade, M. A. B.; Villani, D.; Potiens, M.P.A.; Stuani, Hector; Ubeda, Carlos; Mdletshe, Sibusiso

doi:10.15392/bjrs.v10i1.1732

Braz. J. Rad. Sci.

2022

DOI: 10.15392/bjrs.v10i1.1732

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Attenuation properties of common 3D printed FFF plastics for mammographic applications

Marcus Oliveira

Matheus Brum Marques Bianchi Savi²,

M. A. B. Andrade³

et al.

Abstract: The aim of this study was to evaluate the feasibility of using acrylonitrile butadiene styrene (ABS) and polylactic acid (PLA) 3D printing filaments as materials for mammography phantom construction, comparing their attenuation properties at two different set-ups: at a Calibration Laboratory and directly to a mammography unit. The attenuation of 3D printed test phantoms of two types of common 3D printing Fused Filament Fabrication (FFF) filaments (ABS and PLA) were characterized in comparison with polymethylme… Show more

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2024

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Cited by 3 publications

References 27 publications

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Step-by-step of 3D printing a head-and-neck phantom: Proposal of a methodology using fused filament fabrication (FFF) technology

Savi,

Villani,

Andrade

et al. 2024

Radiation Physics and Chemistry

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Step-by-step of 3D printing a head-and-neck phantom: Proposal of a methodology using fused filament fabrication (FFF) technology

Savi,

Villani,

Andrade

et al. 2024

Radiation Physics and Chemistry

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Optimisation of cone beam CT radiotherapy imaging protocols using a novel 3D printed head and neck anthropomorphic phantom

Alzahrani,

O’Hara,

Bird

et al. 2024

Phys. Med. Biol.

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Objective:This study aimed to optimise Cone Beam Computed Tomography (CBCT) protocols for head and neck (H&N) radiotherapy treatments using a 3D printed anthropomorphic phantom. It focused on precise patient positioning in conventional treatment and adaptive radiotherapy (ART).Approach:Ten CBCT protocols were evaluated with the 3D-printed H&N anthropomorphic phantom, including one baseline protocol currently used at our center and nine new protocols. Adjustments were made to milliamperage and exposure time to explore their impact on radiation dose and image quality. Additionally, the effect on image quality of varying the scatter correction parameter for each of the protocols was assessed. Each protocol was compared against a reference CT scan. Usability was assessed by three Clinical Scientists using a Likert scale, and statistical validation was performed on the findings.Main Results:The work revealed variability in the effectiveness of protocols. Protocols optimised for lower radiation exposure maintained sufficient image quality for patient setup in a conventional radiotherapy pathway, suggesting the potential for reducing patient radiation dose by over 50% without compromising efficacy. Optimising ART protocols involves balancing accuracy across brain, bone, and soft tissue, as no single protocol or scatter correction parameter achieves optimal results for all simultaneously.Significance:This study underscores the importance of optimising CBCT protocols in H&N radiotherapy. Our findings highlight the potential to maintain the usability of CBCT for bony registration in patient setup while significantly reducing the radiation dose, emphasizing the significance of optimising imaging protocols for the task in hand (registering to soft tissue or bone) and aligning with the as low as reasonably achievable (ALARA) principle. More studies are needed to assess these protocols for ART, including CBCT dose measurements and CT comparisons. Furthermore, the novel 3D printed anthropomorphic phantom demonstrated to be a useful tool when optimising CBCT protocols.

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Material imaging study of 3D printing materials for diagnostic radiology phantom development

Oliveira,

Savi,

Vitor

et al. 2024

Braz. J. Rad. Sci.

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The 3D printing techniques have found applications across diverse fields, significantly enhancing design and manufacturing processes. The impact of this growth is particularly notable in radiology, where 3D printing has been applied to developing quality control tools and advancing dosimetry techniques. 3D printing has the advantage of having a wide variety of plastic materials which can be used in the manufacturing process; there is a scarcity of work developed to evaluate the attenuation of the x-ray beam of the materials used in printing 3D models for phantom development. This paper aims to show our results on the imaging characteristics investigation of 15 3D printable materials. 3D objects were printed as cubes of 20 x 20 x 20 mm3 with a 100% infill and 45°/45° rectilinear structural pattern, and images acquired in a DR X-ray unit were analyzed with ImageJ software. Imaging pixel values, Signal-to-Noise Ratio – SNR and Contrast-to-Noise Ratio – CNR were evaluated and compared between the 3D-printed cubes and a standard chest phantom. When comparing the SNR for plastic materials and chest structures, significant differences were found. Similar results were found for the CNR. The differences were noted for both plastic materials, Tungsten and Bismuth, that demonstrated statistically significant values of SNR compared to the lung (p < 0.0001) and right rib (p < 0.0001). Tungsten and Bismuth filaments were found to have the potential to represent the SNR for intermediary and high-density structures. Scapula was the only anatomical structure with no statistically significant difference of the CNR for SILK (p ≥ 0.074), ABS (p ≥ 0.086), PVA (p ≥ 0.917) and ABSpremium (p ≥ 0.955). The study of potential radiological 3D printing materials for diagnostic radiology phantom development revealed important imaging characteristics for the plastic materials using the Fused Filament Fabrication technique.

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Attenuation properties of common 3D printed FFF plastics for mammographic applications

Cited by 3 publications

References 27 publications

Step-by-step of 3D printing a head-and-neck phantom: Proposal of a methodology using fused filament fabrication (FFF) technology

Step-by-step of 3D printing a head-and-neck phantom: Proposal of a methodology using fused filament fabrication (FFF) technology

Optimisation of cone beam CT radiotherapy imaging protocols using a novel 3D printed head and neck anthropomorphic phantom

Material imaging study of 3D printing materials for diagnostic radiology phantom development

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