Imaging science in dentistry · 2026
Evaluation of image quality in conventional intraoral radiographs acquired with a stationary intraoral tomosynthesis system.
СтатьяНазвание и аннотация: Перевод пока не подготовлен
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
Ruiz Débora Costa, Réa Marcela Tarosso, Hadid Gabriela Gavilan, Scarfe William C, Santaella Gustavo Machado, de Oliveira-Santos Christiano, Freitas Deborah Queiroz, de-Azevedo-Vaz Sergio Lins
Аннотация
PURPOSE: To objectively evaluate the image quality of conventional two-dimensional intraoral radiographs acquired with a stationary intraoral tomosynthesis (s-IOT) system under different tube voltage settings and post-processing adjustments.
MATERIALS AND METHODS: Twenty-four radiographs of an acrylic-block phantom were obtained using a s-IOT system coupled to a size-2 CMOS sensor, with standardized exposure parameters (7 mA and 0.16 seconds of exposure) under two conditions: two tube voltages (60 and 70 kVp) and, with ("current image") and without ("current frame") post-processing image export modes. Brightness, noise, and uniformity were quantitatively assessed using ImageJ (U.S National Institutes of Health, Bethesda, MD, USA) software. Twenty-four radiographs of a dental digital quality assurance phantom were obtained under the same conditions to evaluate spatial and contrast resolution, and percentage of radiographic contrast. All image quality parameters were compared between export modes and tube voltages using two-way repeated-measures Analysis of Variance followed by Sidak post-hoc tests (P<0.05).
RESULTS: Current image radiographs had higher brightness and uniformity, lower percentage of radiographic contrast and noise compared with current frame radiographs. Spatial resolution ranged from 9 lp/mm at 60 kVp to 10 lp/mm at 70 kVp, irrespective of post-processing adjustments. Contrast resolution was superior in radiographs without post-processing adjustments, regardless of the kVp.
CONCLUSION: Radiographs acquired with the s-IOT system without post-processing adjustments show lower brightness and higher contrast, but increased noise and reduced uniformity compared with post processed images. Spatial resolution was unaffected by post-processing adjustments but was improved by increasing exposure to 70 kVp.
MATERIALS AND METHODS: Twenty-four radiographs of an acrylic-block phantom were obtained using a s-IOT system coupled to a size-2 CMOS sensor, with standardized exposure parameters (7 mA and 0.16 seconds of exposure) under two conditions: two tube voltages (60 and 70 kVp) and, with ("current image") and without ("current frame") post-processing image export modes. Brightness, noise, and uniformity were quantitatively assessed using ImageJ (U.S National Institutes of Health, Bethesda, MD, USA) software. Twenty-four radiographs of a dental digital quality assurance phantom were obtained under the same conditions to evaluate spatial and contrast resolution, and percentage of radiographic contrast. All image quality parameters were compared between export modes and tube voltages using two-way repeated-measures Analysis of Variance followed by Sidak post-hoc tests (P<0.05).
RESULTS: Current image radiographs had higher brightness and uniformity, lower percentage of radiographic contrast and noise compared with current frame radiographs. Spatial resolution ranged from 9 lp/mm at 60 kVp to 10 lp/mm at 70 kVp, irrespective of post-processing adjustments. Contrast resolution was superior in radiographs without post-processing adjustments, regardless of the kVp.
CONCLUSION: Radiographs acquired with the s-IOT system without post-processing adjustments show lower brightness and higher contrast, but increased noise and reduced uniformity compared with post processed images. Spatial resolution was unaffected by post-processing adjustments but was improved by increasing exposure to 70 kVp.