Computed tomography tissue equivalence of 3D printing materials

Jusufbegović, Merim; Pandžić, Adi; Šehić, Adnan; Jašić, Rahima; Julardžija, Fuad; Vegar-Zubović, Sandra; Beganović, Adnan

doi:10.1016/j.radi.2022.02.008

Cited by 10 publications

(13 citation statements)

References 15 publications

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“…Due to its physical properties (mass density, ρ = 1.20 g/cm 3 ), radiological properties (CT number 50-300 HU) and chemical composition, PLA material has good characteristics in simulating soft tissues and spongious bone. 49,50 The choice of substitute tissues for the phantom production was roughly based according to a published article by Winslow et al but with materials that are currently available on the market. 37 This has led to the use of different component ratios than those used in the work of Winslow et al, but similar to what was reported by Hoerner et al in their work.…”

Section: Discussionmentioning

confidence: 99%

“…The molds for the Tena phantom were 3D printed on two different FDM/FFF—based 3D printers using affordable PLA (lactic acid polymer) material. Due to its physical properties (mass density, ρ = 1.20 g/cm 3 ), radiological properties (CT number 50–300 HU) and chemical composition, PLA material has good characteristics in simulating soft tissues and spongious bone 49,50 …”

Section: Discussionmentioning

confidence: 99%

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Development and validation of the low‐cost pregnant female physical phantom for fetal dosimetry in MV photon radiotherapy

Kopačin,

Brkić,

Ivković

et al. 2023

J Applied Clin Med Phys

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BackgroundMonte Carlo (MC) simulations or measurements in anthropomorphic phantoms are recommended for estimating fetal dose in pregnant patients in radiotherapy. Among the many existing phantoms, there is no commercially available physical phantom representing the entire pregnant woman.PurposeIn this study, the development of a low‐cost, physical pregnant female phantom was demonstrated using commercially available materials. This phantom is based on the previously published computational phantom.MethodsThree tissue substitution materials (soft tissue, lung and bone tissue substitution) were developed. To verify Tena's substitution tissue materials, their radiation properties were assessed and compared to ICRP and ICRU materials using MC simulations in MV radiotherapy beams. Validation of the physical phantom was performed by comparing fetal doses obtained by measurements in the phantom with fetal doses obtained by MC simulations in computational phantom, during an MV photon breast radiotherapy treatment.ResultsMaterials used for building Tena phantom are matched to ICRU materials using physical density, radiation absorption properties and effective atomic number. MC simulations showed that percentage depth doses of Tena and ICRU material comply within 5% for soft and lung tissue, up to 25 cm depth. In the bone tissue, the discrepancy is higher, but again within 5% up to the depth of 5 cm. When the phantom was used for fetal dose measurements in MV photon breast radiotherapy, measured fetal doses complied with fetal doses calculated using MC simulation within 15%.ConclusionsPhysical anthropomorphic phantom of pregnant patient can be manufactured using commercial materials and with low expenses. The files needed for 3D printing are now freely available. This enables further studies and comparison of numerical and physical experiments in diagnostic radiology or radiotherapy.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Development and validation of the low‐cost pregnant female physical phantom for fetal dosimetry in MV photon radiotherapy

Kopačin,

Brkić,

Ivković

et al. 2023

J Applied Clin Med Phys

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“…The linear correlation of Hounsfield values with printing material mass density has been demonstrated. 19,20 Suitable materials should thus be between 1.20 and 1.25 g/cm 3 in density, according to Solc et al 20 The "FilamentPM PLAþ" (Plasty Mladec, Czech Republic) was found suitable, according to manufacturer datasheets. Using a Fused Deposition Modeling (FDM) 3Dprinter (Creality CR6-SE, Shenzhen Creality 3D Technology, China) the two halves were printed, with a resolution of 0.2 mm and 100% infill.…”

Section: Methodsmentioning

confidence: 99%

Low-cost 3D-printed anthropomorphic cardiac phantom, for computed tomography automatic left ventricle segmentation and volumetry – A pilot study

et al. 2023

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“…The mechanical properties of resins used to make the anthropomorphic phantom were tested before and after printing. Results from examining radiographic characterization of 3D printing materials, which include CT number characteristics of additive manufacturing (AM) materials and data that gave an indication of the uniformity of the material by density on the macro-scale, were detailed previously [20]. The skull was 3D printed with Grey V4 material for high-resolution rapid prototyping.…”

Section: Fabrication Of the 3d Modelmentioning

confidence: 99%

“…Information stored in the pixels or voxels of radiological images, such as Hounsfield units (HU), pixel values (PV), or gray values (GV), as well as their size, provide data that could be utilized in the production of phantoms mimicking the human body [17][18][19]. Obtaining this information is the starting point in the analysis of materials used for the printing process [20]. Generally, it is expected for materials to be tissue equivalent, or as close to equivalent as possible.…”

Section: Introductionmentioning

confidence: 99%

Utilisation of 3D Printing in the Manufacturing of an Anthropomorphic Paediatric Head Phantom for the Optimisation of Scanning Parameters in CT

et al. 2023

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Computed tomography (CT) is a diagnostic imaging process that uses ionising radiation to obtain information about the interior anatomic structure of the human body. Considering that the medical use of ionising radiation implies exposing patients to radiation that may lead to unwanted stochastic effects and that those effects are less probable at lower doses, optimising imaging protocols is of great importance. In this paper, we used an assembled 3D-printed infant head phantom and matched its image quality parameters with those obtained for a commercially available adult head phantom using the imaging protocol dedicated for adult patients. In accordance with the results, an optimised scanning protocol was designed which resulted in dose reductions for paediatric patients while keeping image quality at an adequate level.

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Computed tomography tissue equivalence of 3D printing materials

Cited by 10 publications

References 15 publications

Development and validation of the low‐cost pregnant female physical phantom for fetal dosimetry in MV photon radiotherapy

Development and validation of the low‐cost pregnant female physical phantom for fetal dosimetry in MV photon radiotherapy

Low-cost 3D-printed anthropomorphic cardiac phantom, for computed tomography automatic left ventricle segmentation and volumetry – A pilot study

Utilisation of 3D Printing in the Manufacturing of an Anthropomorphic Paediatric Head Phantom for the Optimisation of Scanning Parameters in CT

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