Journal of Hebei Medical University

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The value of diffusion weighted imaging in differential diagnosis of pulmonary tuberculosis and pneumonia

  

  1. Department of radiology, Hebei province thorax hospital of Hebei province, Shijiazhuang 050041, China
  • Online:2018-11-25 Published:2018-11-21

Abstract: [Abstract] Objective〖HTSS〗〓To explore the value of MRI diffusion weighted imaging(DWI) in the differential diagnosis of tuberculosis and pneumonia.
〖HTH〗〖WTHZ〗Methods〖HTSS〗〓A total of 47 pneumonia or pulmonary tuberculosis patients were collected, and all of them were received CT and MRI examination. The tuberculosis group included three types: consolidation, tuberculosis cavity and tuberculoma. The pneumonia group mainly manifested as consolidation. In DWI examination, b value was set as 0, 500 s and 800 s/mm2,and the best examination b value was chosen according to signal noise ratio and contrast to noise ratio of the image. Under the best b value, MRI signal character and apparent diffusion coefficient(ADC) values between the three types of tuberculosis and pneumonia was interpreted.
〖HTH〗〖WTHZ〗Results〖HTSS〗〓The difference between pneumonia consolidation phase and pulmonary tuberculosis consolidation in T1WI was not significant statistically. In T2WI, signal/spinal cord of tuberculosis consolidation was higher than that of pneumonia consolidation phase, which had statistical difference(P<005). The ADC value comparison between pulmonary tuberculosis types and pneumonia consolidation: ADC value of pneumonia group was higher than that of the tuberculosis consolidation group, the ADC value of tuberculosis consolidation and tuberculoma were higher than that of tuberculosis cavity wall, and they had statistical difference(P<005). There was not statistically different between tuberculosis consolidation and tuberculoma(P>005). There was not statistically different between pneumonia consolidation and tuberculoma(P>005).
〖HTH〗〖WTHZ〗Conclusion〖HTSS〗〓ADC value of pneumonia group is higher than that of the tuberculosis consolidation, tuberculoma and tuberculosis cavity wall. DWI can be used as an important way to identify tuberculosis and pneumonia besides CT.

Key words: tuberculosis, pulmonary, pneumonia, magnetic resonance diffusionweighted imaging