Designing and Fabricating Nano-Structured and Micro-Structured Radiation Shields for Protection against CBCT Exposure

Nikeghbal, Kiana; Zamanian, Zahra; Shahidi, Shoaleh; Spagnuolo, Gianrico; Soltani, Parisa

doi:10.3390/ma13194371

Cited by 19 publications

(9 citation statements)

References 29 publications

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“…However, the radiation dose caused by CBCT scan cannot be ignored, and a large number of CBCT‐assisted position setup may lead to a significant increase in the incidence of secondary cancer in patients. 2 Magnetic resonance guidance has advantages, such as high soft tissue resolution and no ionizing radiation but has disadvantages, such as high equipment cost, long imaging time, 3 and no real‐time monitoring. SGRT projects a speckle pattern on the patient by using optical light and cameras with separate camera pods are used to detect the pattern and map the patient's surface.…”

Section: Introductionmentioning

confidence: 99%

“…It can provide three‐dimensional (3D) anatomical structure information of patients, and it is easy to register with planning CT images. However, the radiation dose caused by CBCT scan cannot be ignored, and a large number of CBCT‐assisted position setup may lead to a significant increase in the incidence of secondary cancer in patients 2 . Magnetic resonance guidance has advantages, such as high soft tissue resolution and no ionizing radiation but has disadvantages, such as high equipment cost, long imaging time, 3 and no real‐time monitoring.…”

Section: Introductionmentioning

confidence: 99%

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Augmented reality‐guided positioning system for radiotherapy patients

et al. 2022

J Applied Clin Med Phys

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In modern radiotherapy, error reduction in the patients’ daily setup error is important for achieving accuracy. In our study, we proposed a new approach for the development of an assist system for the radiotherapy position setup by using augmented reality (AR). We aimed to improve the accuracy of the position setup of patients undergoing radiotherapy and to evaluate the error of the position setup of patients who were diagnosed with head and neck cancer, and that of patients diagnosed with chest and abdomen cancer. We acquired the patient's simulation CT data for the three‐dimensional (3D) reconstruction of the external surface and organs. The AR tracking software detected the calibration module and loaded the 3D virtual model. The calibration module was aligned with the Linac isocenter by using room lasers. And then aligned the virtual cube with the calibration module to complete the calibration of the 3D virtual model and Linac isocenter. Then, the patient position setup was carried out, and point cloud registration was performed between the patient and the 3D virtual model, such the patient's posture was consistent with the 3D virtual model. Twenty patients diagnosed with head and neck cancer and 20 patients diagnosed with chest and abdomen cancer in the supine position setup were analyzed for the residual errors of the conventional laser and AR‐guided position setup. Results show that for patients diagnosed with head and neck cancer, the difference between the two positioning methods was not statistically significant (P > 0.05). For patients diagnosed with chest and abdomen cancer, the residual errors of the two positioning methods in the superior and inferior direction and anterior and posterior direction were statistically significant (t = −5.80, −4.98, P < 0.05). The residual errors in the three rotation directions were statistically significant (t = −2.29 to −3.22, P < 0.05). The experimental results showed that the AR technology can effectively assist in the position setup of patients undergoing radiotherapy, significantly reduce the position setup errors in patients diagnosed with chest and abdomen cancer, and improve the accuracy of radiotherapy.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Augmented reality‐guided positioning system for radiotherapy patients

et al. 2022

J Applied Clin Med Phys

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“…Among these is the possibility of the existence of image artifacts especially following metal restoration, the lack of ability to precisely depict the soft tissue’s internal structure, and reduced accuracy of the assigned Hounsfield unit (HU) used for standardized quantification of bone density [ 37 ]. It is worth mentioning that nano-structured radiation shielding materials are effective in the attenuation of X-ray energy [ 38 ].…”

Section: Discussionmentioning

confidence: 99%

Morphometric Analysis of the Mandibular Canal, Anterior Loop, and Mental Foramen: A Cone-Beam Computed Tomography Evaluation

Ahmed

Jamleh

et al. 2021

IJERPH

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This study investigated the cone-beam computed tomography (CBCT)-based features of the mandibular canal, mental foramen, anterior loop, and accessory mental foramina with respect to age and sex. A total of 306 CBCT mandibular images were included in this retrospective study to measure the mandibular canal location and extension, the mental foramen position, the presence of the anterior loop, and the accessory mental foramina. The measurements were obtained in sagittal, coronal, and axial views. Descriptive statistics are presented. Sex-related differences, correlations, and comparisons were calculated using SPSS at 5% significance level. The mandibular canal was located more coronal and medial in male patients. The majority of cases had the mental foramen located just apical to the mandibular second premolar with a mean height of 2.94 mm and a mean length of 3.28 mm. Age affected the size of the mental foramen. The mental canal in all cases tended to show a coronal direction. Mesial extension of the anterior loop was found in 66.01% of the images while accessory mental foramina were detected in 2.6%. The complexity of the mandibular canal, mental foramen, anterior loop, and accessory mental foramina among Sudanese patients with respect to age and sex was confirmed.

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“…In addition, working long hours with heavy equipment is inconvenient for technicians. Inhalation is another risk factor, as floating microparticles in the air has been reported [13,14]. Lead exposure may also induce several biological complications depending on the level and the duration of exposure.…”

Section: Introductionmentioning

confidence: 99%

“…Several nanomaterials, such as tungsten, bismuth, phthalonitrile, molybdenum, carbon allotropes (graphene, graphene oxide, etc.) and their composites, have been used as an effective radiation-shielding material [14,[21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Evaluating the X-ray-Shielding Performance of Graphene-Oxide-Coated Nanocomposite Fabric

et al. 2022

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Exposure to ionizing radiation (IR) during diagnostic medical procedures brings certain risks, especially when experiencing recurrent exposures. The fabrication of nano-based composites, doped with different nanoparticles, have been suggested as effective shielding materials to replace conventional lead-based ones in material sciences and nanotechnology. In this study, commercially available fabrics, used to produce scrubs and gowns for clinical staff, are modified utilizing graphene oxide (GO) nanoparticles using a layer-by-layer (LBL) technique. GO was obtained from graphite through environmentally friendly technology by using a modified–improved Hummers’ method without NaNO3. Lightweight, flexible, air- and water-permeable shielding materials are produced that are wearable in all-day clinical practice. The nanoparticles are kept to a minimum at 1 wt%; however, utilizing the LBL technique they are distributed evenly along the fibers of the fabrics to achieve as much shielding effect as possible. The evaluation of samples is accomplished by simulating real-time routine clinical procedures and the radiographic programs and devices used daily. The GO-coated nanocomposite fabrics demonstrated promising results for X-ray shielding.

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Designing and Fabricating Nano-Structured and Micro-Structured Radiation Shields for Protection against CBCT Exposure

Cited by 19 publications

References 29 publications

Augmented reality‐guided positioning system for radiotherapy patients

Augmented reality‐guided positioning system for radiotherapy patients

Morphometric Analysis of the Mandibular Canal, Anterior Loop, and Mental Foramen: A Cone-Beam Computed Tomography Evaluation

Evaluating the X-ray-Shielding Performance of Graphene-Oxide-Coated Nanocomposite Fabric

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