Construction and verification of a physical chest phantom from suitable tissue equivalent materials for computed tomography examinations

amini, iman; Akhlaghi, Parisa; Sarbakhsh, Parvin

doi:10.1016/j.radphyschem.2018.04.020

Cited by 18 publications

(14 citation statements)

References 26 publications

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“…A needle‐puncture wound model contaminated with U and Pu was prepared using a polyethylene block (~15 mm × 15 mm × 15 mm) with a hole of 1‐mm diameter and 0.5‐mm depth. Polyethylene is commonly used as a human tissue substrate . We dropped 2 μl of 150‐ppm uranyl acetate solution produced from uranyl acetate dehydrate (Fulka stock no.…”

Section: Methodsmentioning

confidence: 99%

Optimization of a primary X‐ray filter for X‐ray fluorescence analysis of uranium and plutonium

et al. 2019

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When workers are wounded at a nuclear fuel handling facility, it is difficult to quantify actinide contamination through α‐particle counting because these particles are shielded by blood. To overcome this problem, we used X‐ray fluorescence (XRF) analysis with a handheld‐type device that is useful in cases where sampling is not allowed, such as in this study. In XRF analysis, a primary X‐ray filter made of metal foil is generally inserted between the X‐ray tube and the sample to attenuate the incident X‐ray at the energy region of the XRF signal for the target element. Doing so can reduce the background signal originating from the scattered radiation of the incident X‐ray. In this study, we aimed to optimize a primary X‐ray filter that facilitates simultaneous high‐sensitivity analysis of uranium and plutonium in a wound. For this purpose, XRF measurements were performed for a needle‐puncture wound model contaminated by U and Pu, and the relationship between the filter material/thickness and the detection limit was investigated. Optimizing the filter material/thickness of a given target element was found to improve the detection limit of the measurement by ~10%.

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Section: Methodsmentioning

confidence: 99%

Optimization of a primary X‐ray filter for X‐ray fluorescence analysis of uranium and plutonium

et al. 2019

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“…According to the physical properties (mass density, electron density and effective atomic number) of real tissues in chest region, water, Polyurethane foam, Polypropylene, Polyethylene, Acrylonitrile butadiene styrene, Polyurethane, Polyamide and Polyoxymethylene were selected and prepared for replacement of water, lungs (in both inhale and exhale modes), adipose, breasts, muscle, liver, cartilage and ribs, respectively ( Fig. 1) (Amini et al, 2018).…”

Section: Physical Phantommentioning

confidence: 99%

“…Each ROI was considered in the middle of each material away from the edges to avoid partial volume effects influencing the results (Inness et al, 2014). Given that two locations were assigned for each material, the average HUs of these two sites was considered as final HU of that material (Amini et al, 2018).…”

Section: Measurement Of Ct Numbermentioning

confidence: 99%

“…http://www.cirsinc.com/products/all/24/ electron-density-phantom, and http://www.rsdphantoms.com). In this regard, Amini et al (2018) was designed and fabricated a physical phantom of adult chest region that could be used for dosimetry and calibration purposes (Amini et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Considering the importance of calibration curves in treatment planning systems, the purpose of this paper is investigating both stoichiometric and tissue substitute methods for a specific CT scanner (Siemens SOMATOM sensation 64slice scanner) at common tube voltage of chest scan (120 kVp) using of a homemade physical chest phantom (Amini et al, 2018). The calibration curves for other tube voltages (80, 100, and 140 kVp) were also obtained.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of CT calibration curves from stoichiometric and tissue substitute methods according to tissue characteristics

amini

Akhlaghi

2019

Radioprotection

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In order to optimize and increase the precision of dose determination, it is important to obtain the relationship between CT Hounsfield units and electron densities, as the basic inputs for radiotherapy planning systems. Therefore, the aim of this study was to plot and compare the CT calibration curves resulted from both tissue substitute calibration (based on the tissue equivalent materials) and stoichiometric calibration (based on biological tissues) methods for a specific CT scanner at tube voltage of 120 kVp by applying a precise homemade physical phantom. Hence, the Hounsfield units of all phantom materials were measured experimentally and also calculated by related formulas. Considering the CT numbers and the electron densities of various tissue equivalent materials and real tissues, the calibration curves were plotted. According to the results, the higher accuracy of the stoichiometric method relative to tissue substitute method was confirmed in this study. On the other hand, since estimating Hounsfield unit of each human tissue strongly depends on the physical properties of tissue substitutes of the physical phantom, the high precision of this phantom led to increase the accuracy of the calibration curves obtained based on the stoichiometric method.

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Evaluating polyester resin as a viable substitute for PMMA in computed tomography dosimetry phantoms

Khallouqi,

Halimi,

El rhazouani

2024

Nuclear Engineering and Technology

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Construction and verification of a physical chest phantom from suitable tissue equivalent materials for computed tomography examinations

Cited by 18 publications

References 26 publications

Optimization of a primary X‐ray filter for X‐ray fluorescence analysis of uranium and plutonium

Optimization of a primary X‐ray filter for X‐ray fluorescence analysis of uranium and plutonium

Evaluation of CT calibration curves from stoichiometric and tissue substitute methods according to tissue characteristics

Evaluating polyester resin as a viable substitute for PMMA in computed tomography dosimetry phantoms

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