10/11/2023 0 Comments Yamada masahiro 2004 terTheoretically, X-ray translucency changes depending on the volume of air and lung vessel/blood per unit volume in the image ( Fig. Furthermore, researchers have tried to visualize pulmonary ventilation and perfusion based on changes in X-ray translucency in digital fluoroscopic images using subtraction techniques ( 15, 16, 17, 18, 19, 20). Several studies have evaluated diaphragmatic motion using fluoroscopy and demonstrated its usefulness ( 13, 14). In addition, attempts have been made to use X-ray-based techniques, including fluoroscopy and dynamic X-ray (DXR), for cardiopulmonary functional imaging ( 1, 2, 12). CT and MRI are also utilized in lung functional imaging ( 6, 7, 8, 9, 10, 11). In recent clinical practice, scintigraphy has been shown to play an essential role in these evaluations ( 3, 4, 5). Further investigations are needed to utilize DXR more effectively and to establish it as a valuable diagnostic tool.Įvaluation of respiratory physiology and circulation is essential for management of patients with cardiopulmonary diseases ( 1, 2). Thus, DXR has a great potential to play an important role in the clinical setting. DXR may serve as an alternative to pulmonary function tests in patients requiring contact inhibition, including patients with suspected or confirmed coronavirus disease 2019 or other infectious diseases. Many clinical studies have reported the feasibility of DXR and its characteristic findings in pulmonary diseases. It offers many advantages such as a high temporal resolution and flexibility in body positioning. ![]() DXR analyzes dynamic changes on the basis of X-ray translucency and can be used for analysis of diaphragmatic kinetics, ventilation, and lung perfusion. ![]() This article aims to describe the mechanism of DXR and the analysis methods used as well as review the clinical evidence for its use. Dynamic X-ray (DXR) is a functional imaging technique that uses sequential images obtained by a flat-panel detector (FPD).
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