Evaluation of the dose reduction capabilities in digital radiography of the chest using contrast-detail phantom
Assessment of the quality of the images obtained using optimized (low-dose) protocols is the inherent part of the optimization in X-ray diagnostics. To perform the objective quantitative image quality assessment one can use dedicated test-objects, including several components for the simultaneous me...
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| Format: | Article |
| Language: | English |
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Saint-Petersburg Research Institute of Radiation Hygiene after Professor P.V. Ramzaev
2019-03-01
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| Series: | Радиационная гигиена |
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| Online Access: | https://www.radhyg.ru/jour/article/view/596 |
| _version_ | 1797873815763550208 |
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| author | A. V. Vodovatov |
| author_facet | A. V. Vodovatov |
| author_sort | A. V. Vodovatov |
| collection | DOAJ |
| description | Assessment of the quality of the images obtained using optimized (low-dose) protocols is the inherent part of the optimization in X-ray diagnostics. To perform the objective quantitative image quality assessment one can use dedicated test-objects, including several components for the simultaneous measurement of the different physical image characteristics (contrast and spatial resolution). The use of such test objects allows estimating and assessing the relations between the patient dose, parameter of the X-ray examination and image quality. That is especially important for the optimization of the digital radiographic examinations performed with automated exposure control. The aim of the current study was to evaluate the possibilities of the patient dose reduction using “contrast-detail” test-object for the digital radiography of the chest in posterior-anterior projection performed with automated exposure control. The study was performed in St-Petersburg Mariinsky hospital on a digital X-ray unit “ARC-Electron” with a flat-panel detector. The combination of a test-object and a tissue-equivalent phantom were imaged on a range of chest X-ray protocols: on a 60–150 kV tube voltage range with automated exposure control; and using fixed 90 kV tube voltage on a range of 2–100 mAs tube current-exposure time product. Dose-area product (cGy×cm2) was measured for each exposure; effective dose (mSv) was estimated for each exposure based on dose-area product. A dedicated software was developed for the automated image quality assessment. The results of the study indicate that the use of a high tube voltage (140–150 kV) with current automated exposure control settings would lead to 60% and 95% reduction of the dose-area product and effective dose, respectively, compared to the standard protocol. The adjustment of the current automated exposure control settings with the reduction of the tube current-exposure time product from 11,2 mAs to the 4,2 mAs for the tube voltage of 90 kV would lead to the reduction of both the dose-area product and effective dose up to a factor of three, compared to the standard protocol. For both scenarios image quality characteristics decreased by less than 15%. The proposed low-dose protocols are under the clinical approbation at Mariinsky hospital. The proposed method of image quality assessment and development of low-dose protocols is recommended for inclusion in the quality assurance program for the radiography examinations. |
| first_indexed | 2024-04-10T01:22:13Z |
| format | Article |
| id | doaj.art-ce7bebefd3974c1099cd39e5d674f29c |
| institution | Directory Open Access Journal |
| issn | 1998-426X |
| language | English |
| last_indexed | 2024-04-10T01:22:13Z |
| publishDate | 2019-03-01 |
| publisher | Saint-Petersburg Research Institute of Radiation Hygiene after Professor P.V. Ramzaev |
| record_format | Article |
| series | Радиационная гигиена |
| spelling | doaj.art-ce7bebefd3974c1099cd39e5d674f29c2023-03-13T09:47:09ZengSaint-Petersburg Research Institute of Radiation Hygiene after Professor P.V. RamzaevРадиационная гигиена1998-426X2019-03-01121627310.21514/1998-426X-2019-12-1-62-73569Evaluation of the dose reduction capabilities in digital radiography of the chest using contrast-detail phantomA. V. Vodovatov0Санкт-Петербургский научно-исследовательский институт радиационной гигиены имени профессора П.В. Рамзаева, Федеральная служба по надзору в сфере защиты прав потребителей и благополучия человекаAssessment of the quality of the images obtained using optimized (low-dose) protocols is the inherent part of the optimization in X-ray diagnostics. To perform the objective quantitative image quality assessment one can use dedicated test-objects, including several components for the simultaneous measurement of the different physical image characteristics (contrast and spatial resolution). The use of such test objects allows estimating and assessing the relations between the patient dose, parameter of the X-ray examination and image quality. That is especially important for the optimization of the digital radiographic examinations performed with automated exposure control. The aim of the current study was to evaluate the possibilities of the patient dose reduction using “contrast-detail” test-object for the digital radiography of the chest in posterior-anterior projection performed with automated exposure control. The study was performed in St-Petersburg Mariinsky hospital on a digital X-ray unit “ARC-Electron” with a flat-panel detector. The combination of a test-object and a tissue-equivalent phantom were imaged on a range of chest X-ray protocols: on a 60–150 kV tube voltage range with automated exposure control; and using fixed 90 kV tube voltage on a range of 2–100 mAs tube current-exposure time product. Dose-area product (cGy×cm2) was measured for each exposure; effective dose (mSv) was estimated for each exposure based on dose-area product. A dedicated software was developed for the automated image quality assessment. The results of the study indicate that the use of a high tube voltage (140–150 kV) with current automated exposure control settings would lead to 60% and 95% reduction of the dose-area product and effective dose, respectively, compared to the standard protocol. The adjustment of the current automated exposure control settings with the reduction of the tube current-exposure time product from 11,2 mAs to the 4,2 mAs for the tube voltage of 90 kV would lead to the reduction of both the dose-area product and effective dose up to a factor of three, compared to the standard protocol. For both scenarios image quality characteristics decreased by less than 15%. The proposed low-dose protocols are under the clinical approbation at Mariinsky hospital. The proposed method of image quality assessment and development of low-dose protocols is recommended for inclusion in the quality assurance program for the radiography examinations.https://www.radhyg.ru/jour/article/view/596медицинское облучениеконтроль качества изображениятест-объект «контраст-деталь»пространственное разрешениеконтрастоптимизация |
| spellingShingle | A. V. Vodovatov Evaluation of the dose reduction capabilities in digital radiography of the chest using contrast-detail phantom Радиационная гигиена медицинское облучение контроль качества изображения тест-объект «контраст-деталь» пространственное разрешение контраст оптимизация |
| title | Evaluation of the dose reduction capabilities in digital radiography of the chest using contrast-detail phantom |
| title_full | Evaluation of the dose reduction capabilities in digital radiography of the chest using contrast-detail phantom |
| title_fullStr | Evaluation of the dose reduction capabilities in digital radiography of the chest using contrast-detail phantom |
| title_full_unstemmed | Evaluation of the dose reduction capabilities in digital radiography of the chest using contrast-detail phantom |
| title_short | Evaluation of the dose reduction capabilities in digital radiography of the chest using contrast-detail phantom |
| title_sort | evaluation of the dose reduction capabilities in digital radiography of the chest using contrast detail phantom |
| topic | медицинское облучение контроль качества изображения тест-объект «контраст-деталь» пространственное разрешение контраст оптимизация |
| url | https://www.radhyg.ru/jour/article/view/596 |
| work_keys_str_mv | AT avvodovatov evaluationofthedosereductioncapabilitiesindigitalradiographyofthechestusingcontrastdetailphantom |