Background Although chest radiography is a useful examination tool,it has limitations.Because not all chest conditions can be detected on a radiograph,radiography cannot necessarily rule out all irregularities in the ...Background Although chest radiography is a useful examination tool,it has limitations.Because not all chest conditions can be detected on a radiograph,radiography cannot necessarily rule out all irregularities in the chest.Therefore,further imaging studies may be required to clarify the results of a chest radiograph,or to identify abnormalities that are not readily visible.The aim of this study was to compare traditional chest radiography with acoustic-based imaging （vibration response imaging） for the detection of lung abnormalities in patients with acute dyspnea.Methods The current investigation was a pilot study.Respiratory sounds throughout the respiratory cycle were captured using an acoustic-based imaging technique.Consecutive patients who presented to the emergency department with acute dyspnea and a normal chest radiograph on admission were enrolled and underwent imaging at the time of presentation.Dynamic and static images of vibration （breath sounds） and a dynamic image score were generated,and assessments were made using an evaluation form.Results In healthy volunteer controls （n=61）,the mean dynamic image score was 6.3±1.9.In dyspneic patients with normal chest radiographs （n=51） and abnormal chest radiographs （n=48）,the dynamic image scores were 4.7±2.7 and 5.1±2.5,respectively （P ＜0.05）.The final assessment of the vibration images indicated abnormal findings in 15％,86％ and 90％ of the participants in the above groups,respectively （P ＜0.05）.Conclusions In patients with acute dyspnea who present with normal chest radiographs,respiratory sound analyses often showed abnormal values.Hence,the ability of acoustic-based recordings to offer objective and noninvasive measurements of abnormal sound transmission may be useful in the clinical setting for patients presenting with acute dyspnea.展开更多
文摘Background Although chest radiography is a useful examination tool,it has limitations.Because not all chest conditions can be detected on a radiograph,radiography cannot necessarily rule out all irregularities in the chest.Therefore,further imaging studies may be required to clarify the results of a chest radiograph,or to identify abnormalities that are not readily visible.The aim of this study was to compare traditional chest radiography with acoustic-based imaging （vibration response imaging） for the detection of lung abnormalities in patients with acute dyspnea.Methods The current investigation was a pilot study.Respiratory sounds throughout the respiratory cycle were captured using an acoustic-based imaging technique.Consecutive patients who presented to the emergency department with acute dyspnea and a normal chest radiograph on admission were enrolled and underwent imaging at the time of presentation.Dynamic and static images of vibration （breath sounds） and a dynamic image score were generated,and assessments were made using an evaluation form.Results In healthy volunteer controls （n=61）,the mean dynamic image score was 6.3±1.9.In dyspneic patients with normal chest radiographs （n=51） and abnormal chest radiographs （n=48）,the dynamic image scores were 4.7±2.7 and 5.1±2.5,respectively （P ＜0.05）.The final assessment of the vibration images indicated abnormal findings in 15％,86％ and 90％ of the participants in the above groups,respectively （P ＜0.05）.Conclusions In patients with acute dyspnea who present with normal chest radiographs,respiratory sound analyses often showed abnormal values.Hence,the ability of acoustic-based recordings to offer objective and noninvasive measurements of abnormal sound transmission may be useful in the clinical setting for patients presenting with acute dyspnea.
