Impact of acquisition parameters on dose and image quality optimisation in paediatric pelvis radiography—A phantom study

Ali, Ali Mohammed; Hogg, Peter; Abuzaid, Mohamed M.; England, Andrew

doi:10.1016/j.ejrad.2019.07.014

Cited by 7 publications

(3 citation statements)

References 22 publications

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“…The issue with identifying tissue using this method is that it’s specific to a particular energy(6). The Hounsfield Unit (HU) values for human tissues have been extensively studied, with muscular tissue ranging from 40 to 44 according to White et al 1989 (5), 60 (±) 30 according to Sirtoli et al 2017 (7) y 54 (±) 7 according to Niebuhr et al 2019(8); For cancellous bone tissue according to Mohammed et al, 2019, of 262(9) and 265 according to Sirtoli et al, 2017(7); For cortical bone tissue, 1454 according to Abdullah et al, 2018(10) and 819 (±) 211 according to Niebuhr et al, 2016(11); For adipose tissue, from -95 to -55 according to Woodard & White, 1986. (12) and Niebuhr et al, 2016(11).…”

Section: Introductionmentioning

confidence: 99%

Low-Cost Pelvic Phantom Prototype With Materials Resembling Human Tissues

Coya,

Meier,

Herrera

et al. 2024

Preprint

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Introduction: Phantoms are elements used in radiological services for quality control tests. In the case of equipment with ionizing radiation, quality control tests focus on image quality and dosimetry. These phantoms are made with materials that resemble human tissues internally but are high-cost and difficult to access for radiology services. Objectives: To design a methodology for creating an anthropomorphic radiology phantom with materials correlating to human tissues of the pelvis for various uses, using Hounsfield Units (HU) as a comparison. Methodology: Data from 34 female patients with bone pelvis exams were collected. HU was measured in bone, muscle, and adipose tissue of the hip. Simultaneously, HU of different material mixtures was measured to correlate data between patients and materials for the creation of a right hip phantom. Results: HU values of the materials match human tissues except for adipose tissue, which is slightly increased. The costs for phantom creation were low. Discussion and Conclusion: HU estimates of materials and human tissue mostly align with those estimated in the sample and reported in the literature, achieving the creation of a low-cost phantom easily accessible for institutions or educational centers requiring quality, dosimetry, or educational tests. Keywords: Dosimetry, Ionizing Radiation, Radiology, Radiology Phantoms.

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Section: Introductionmentioning

confidence: 99%

Low-Cost Pelvic Phantom Prototype With Materials Resembling Human Tissues

Coya,

Meier,

Herrera

et al. 2024

Preprint

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“…Moreover, their higher cost puts some limitations on their wider availability in the hospital environment. Previous radiography dose optimisation studies used different phantom types including anthropomorphic phantoms [13,14], in-house developed phantoms [10][11][12][13][14][15] and quality control phantoms (e.g. CDRAD phantom and Primus-L phantom) [16,17].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the performance of digital x-ray systems in pelvis radiography

Jreije,

Krynke,

Gricienė

et al. 2024

J. Radiol. Prot.

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The aim of this study was to investigate the performance of eight digital radiography systems and to optimise the dose-image quality relationship for digital pelvis radiography. The study involved eight digital radiography systems used for general examinations at Vilnius University Hospital Santaros Klinikos. An anthropomorphic pelvic phantom (CIRS, US) was used to simulate a patient undergoing clinical pelvis radiography. Dose quantities entrance surface dose, dose area product (DAP) and exposure parameters (kVp, mA, mAs) were measured and the effects on the images were evaluated, considering physical contrast to noise ratio (CNR) and observer-based evaluations as image quality metrics. Increasing the tube voltage by 5 kVp from standard protocol led to a reduction in radiation dose (DAP) by 12%–20% with a slight impact on image quality (CNR decreases by 2%–10%). There was an inter-observer variability in image rating across different equipment (kappa value between 0 and 0.3); however, both observers agreed that increasing kVp up to 85–90 kV had no effect on perceived image quality. The results indicate that optimisation strategies should be tailored specifically for each x-ray system since significant performance differences and wide variations in radiation dose exist across various digital radiography systems used in clinical settings. The use of high kVp can be used for dose optimisation in digital pelvis radiography without compromising image diagnostic accuracy.

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“…Children were used in studies on dose optimization and image quality by altering parameters, one of which was tube current-time. Radiation exposure is monitored with a dosimeter [25] and used to conduct an assessment of image quality together with the AEC variation [26].…”

Section: Introductionmentioning

confidence: 99%

The Influence of X-Ray Tube Current-Time Variations Toward Signal to Noise Ratio (SNR) in Digital Radiography: A Phantom Study

Utami¹,

Istiqomah²

2023

AMM

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Several image enhancement applications can be used to increase SNR and brightness. However, if the setting of tube current-time is too high, the application can not reduce the radiation dose. So, It is necessary to test tube current-time variations on the SNR value and image quality to determine the effect on body organs and radiation dose. This study aims to determine the influence of tube current-time on SNR and with this research is expected to be an input for radiographers in the field to pay attention to parameter settings for patients. We compared five tube current-time variations on the Antebrachii examination by using Phantom (58 kV, 32 mA, 50 mSec), (58 kV, 100 mA, 50 mSec), (58 kV, 32 mA, 5 mAs), (58 kV , 32 mA, 5 mAs) and (58kV, 100 mA, 5 mAs). Then we made a circle of ROI with a diameter of 0.2 cm2 on the Bone, Soft-tissue and Air sections in that four tube current-time variations, each of which has 7 ROI points tocalculate the SNR and the radiation dose is seen from the image. There is a difference in SNR on tube current-time changes and affects the image quality with an Adjusted R square value of 0.003 and 0.865. It shows that there is a change in tube current that affects the Signal to Noise Ratio between organs. Since it is proven that changes in tube current-time affect image quality, further research can formulate an ideal parameter for the examination of each organ.

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Impact of acquisition parameters on dose and image quality optimisation in paediatric pelvis radiography—A phantom study

Cited by 7 publications

References 22 publications

Low-Cost Pelvic Phantom Prototype With Materials Resembling Human Tissues

Low-Cost Pelvic Phantom Prototype With Materials Resembling Human Tissues

Evaluation of the performance of digital x-ray systems in pelvis radiography

The Influence of X-Ray Tube Current-Time Variations Toward Signal to Noise Ratio (SNR) in Digital Radiography: A Phantom Study

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