Objective      To explore the value of vibration response imaging (VRI) in the diagnosis of bronchial asthma and chronic obstructive pulmonary diseases (COPD).       Methods      A retrospective study was performed on 10 bronchial asthma patients

10 COPD patients and 10 healthy volunteers who undergoing VRI in our hospital from June 2012 to January 2015. Their VRI including maximum energy frame (MEF)

dynamic image

respiratory curve

envelope of acoustic signal (EVP)

total scores of dynamic imaging

the highest value of vibrational energy and the total quantitative lung data (QLD) value of right lung among bronchial asthma

COPD and healthy controls were analyzed.       Results      Compared with the healthy controls

MEF

dynamic image

respiratory curve

EVP curve and total scores of dynamic imaging were significantly higher in bronchial asthma patients (P0.05)

but the highest value of vibrational energy and the total QLD value of right lung were higher

but without significant difference (P0.05). MEF

dynamic image

respiratory curve

EVP curve and total scores of dynamic imaging were significantly higher in COPD patients (P0.05)

but the highest value of vibrational energy was increased and the total QLD value of right lung was decreased though both having no  statistical significance (P0.05). The bronchial asthma group had obviously higher dynamic image

respiratory curve

the highest value of vibrational energy and total scores of dynamic imaging than the COPD group (P0.05). But no significant difference was seen in the EVP curve and the total QLD of right lung between the 2 groups (P0.05).       Conclusion      Dynamic imaging

respiratory curve

the highest value of vibrational energy and total scores of dynamic imaging from VRI are helpful in the diagnosis and differential diagnosis between bronchial asthma and COPD.