Patient Dose Assessment and Optimisation of Pelvic Radiography With Computed Radiography Systems

Abbeyquaye, D.; Inkoom, Stephen; Hammond, N B; Fletcher, J. J.; Botwe, Benard Ohene

doi:10.1093/rpd/ncab111

Cited by 4 publications

(3 citation statements)

References 26 publications

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“…We evaluated three physical image quality parameters that are widely used in publications related to practice optimization in radiology [ [27] , [28] , [29] ]: Signal-to-noise ratio (SNR) that relates the useful information of the structure of interest (signal) to the variation in brightness level within a ROI (noise) [ 30 ]. We calculated SNR using Equation (1) [ 27 ].…”

Section: Methodsmentioning

confidence: 99%

Radiation dose reduction and image quality evaluation for lateral lumbar spine projection

Nocetti,

Villalobos,

Marín

et al. 2023

Heliyon

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Section: Methodsmentioning

confidence: 99%

Radiation dose reduction and image quality evaluation for lateral lumbar spine projection

Nocetti,

Villalobos,

Marín

et al. 2023

Heliyon

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“…Additionally, information on paediatric imaging practices, equipment performance, and paediatric patient dose parameters are available, hence national DRLs for commonly used paediatric imaging procedures can be proposed. Furthermore, it also provides a clear path to establish guidelines for imaging paediatric patients and to recommend the use of appropriate and sound clinical justi cation before imaging paediatric and unborn child using high dose imaging modality such as CT imaging [2, 3,4]. Consequently, this will enable further analysis of the risk factors associated with paediatric CT examination, especially with the commonly used paediatric imaging procedures which account for approximately 90% of CT examinations in Ghana, that is head, abdomen, and chest examinations [4,5].…”

Section: Introductionmentioning

confidence: 99%

Paediatric National Diagnostic Reference Levels of Computed Tomography Examination in Ghana

Shirazu

Sackey

Edziah

et al. 2023

Preprint

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Introduction: The aim of the study was to establish and propose the utilisation of National Diagnostic Reference Levels (DRLs) for DLP (dose length product) and CTDIvol (volume weighted computed tomography dose index) for routine computed tomography (CT) for paediatric examinations. Additionally, the study estimated signal-to-noise ratio and lifetime attributable radiation risk. The materials used include multi-detector computed tomography machine, quality control equipment, Head and Body phantoms and MeVisLab workstation. Methods: The methodology involved estimation of CTDIVOL, DLP, using a minimum of 20 patients per CT facility, imaging parameters for the head, chest, and abdomen-pelvis CT examinations. In all 300 images of randomly selected paediatric patients undergoing CT scans of head, chest, and abdomen-Pelvis from five centres. 200 images which met the selection criterion were used for the analysis. Results: The measured median and upper quartile CTDIvol for head were 6.86 and 7.33 mGy, chest was 6.98 and 6.70 mGy, abdomen-pelvis were 4.71 and 5.28 mGy respectively. While DLP for head was 1103.00 and 1249.58 mGy-cm, chest was 978.86 and 1250.42 mGy-cm, abdomen-pelvis were 565.85 and 787.05 mGy-cm. Conclusion: The results of the CTDI and DLP values were comparable to international standard values. It also recommends the use of the established CTDI and DLP as reference values for future intercomparison of data from similar studies.

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“…Abbeyquaye et al [3] studies emphasized the importance of optimizing radiographic examinations of the pelvic region, as they concluded that the patient may be exposed to an effective dose (ED) 20 times higher when compared to an examination of the chest. Although the average ED per examination in all plain radiographs is relatively low, for pelvic region examinations, it still represents higher values compared to other sites [4].…”

Section: Introductionmentioning

confidence: 99%

Experimental Evaluation of Optimization in Cr and Dr Digital Radiography Systems: A Study with Anthropomorphic Phantom

S. T.,

S. C.,

V. T.

2023

CJAST

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Place and Duration of Study: Sample: The experimental optimization study was conducted at a radiology clinic in Santa Maria, RS, Brazil between June 2022 and December 2022. In this study, we verified the efficiency of two digital radiography image acquisition systems (CR and DR) for a radiographic system. Methodology: We used an anthropomorphic phantom that represents the anatomy of the pelvis region of an adult patient. For image acquisition and dosimetric measurements, the radiographic system and two clinical use image digitization systems were used, and the dosimetric measurements were obtained through a radiation detector. For optimization of the exam, five different exposure techniques were used. With ImageJ software it was possible to obtain the signal and noise values for image quality (IQ) from regions of interest (ROI) defined in the image anatomy. The signal-to-noise ratio (SNR) was calculated. The percentage deviation (D%) was chosen to compare the readings against the reference technique, which is used by radiology professionals in the clinic for pelvic examination. Results: The results obtained in this study point out that the DR system offers a constant SNR and a better visualization of tissues at low contrast when compared to the CR system. It was found that by raising the X-ray tube voltage and reducing the current product by time (70 kV and 32 mAs) to (100 kV and 5 mAs) one can optimize the pelvis radiographic examination for DR system, i.e., the KERMA in the incident air (KAR) was reduced from 2.9 mGy to 0.5 mGy (-76.3%) at the patient's pelvis surface. Average dose reduction in organs from 3.07 to 0.94 mGy (-69.5%) in the testes, 0.69 to 0.33 mGy (-52.2%) in the ovaries, 1.20 to 0.51 mGy (-57.3%) in the prostate, 0.14 to 0.07% (-46.4%) mGy in the bone marrow and 35.3% and 62.2% reduction (0.45 to 0.17) mSv the total effective dose of the exam with IQ higher by 11%.

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Patient Dose Assessment and Optimisation of Pelvic Radiography With Computed Radiography Systems

Cited by 4 publications

References 26 publications

Radiation dose reduction and image quality evaluation for lateral lumbar spine projection

Radiation dose reduction and image quality evaluation for lateral lumbar spine projection

Paediatric National Diagnostic Reference Levels of Computed Tomography Examination in Ghana

Experimental Evaluation of Optimization in Cr and Dr Digital Radiography Systems: A Study with Anthropomorphic Phantom

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