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27 July 2015 : Clinical Research  

Evaluation of Vibration Response Imaging (VRI) Technique and Difference in VRI Indices Among Non-Smokers, Active Smokers and Passive Smokers

Hongying JiangABCDEFG, Jichao ChenABCDEF, Jinying CaoBCD, Lan MuBDF, Zhenyu HuBDE, Jian HeCDF

DOI: 10.12659/MSM.894335

Med Sci Monit 2015; 21:2170-2177

Abstract

BACKGROUND: Vibration response imaging (VRI) is a new technology for lung imaging. Active smokers and non-smokers show differences in VRI findings, but no data are available for passive smokers. The aim of this study was to evaluate the use of VRI and to assess the differences in VRI findings among non-smokers, active smokers, and passive smokers.

MATERIAL AND METHODS: Healthy subjects (n=165: 63 non-smokers, 56 active smokers, and 46 passive smokers) with normal lung function were enrolled. Medical history, physical examination, lung function test, and VRI were performed for all subjects. Correlation between smoking index and VRI scores (VRIS) were performed.

RESULTS: VRI images showed progressive and regressive stages representing the inspiratory and expiratory phases bilaterally in a vertical and synchronized manner in non-smokers. Vibration energy curves with low expiratory phase and plateau were present in 6.35% and 3.17%, respectively, of healthy non-smokers, 41.07% and 28.60% of smokers, and 39.13% and 30.43% of passive smokers, respectively. The massive energy peak in the non-smokers, smokers, and passive-smokers was 1.77±0.27, 1.57±0.29, and 1.66±0.33, respectively (all P<0.001). A weak but positive correlation was observed between VRIS and smoking index.

CONCLUSIONS: VRI can intuitively show the differences between non-smokers and smokers. VRI revealed that passive smoking can also harm the lungs. VRI could be used to visually persuade smokers to give up smoking.

Keywords: Diagnostic Imaging - methods, Lung - pathology, Prospective Studies, Respiratory Function Tests, Smoking - pathology, Tobacco Smoke Pollution, Vibration

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750