Imaging Science and Photochemistry ›› 2020, Vol. 38 ›› Issue (3): 503-507.DOI: 10.7517/issn.1674-0475.191118

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Application Value of Big-pitch Low-dose Pulmonary CT in COPD Patients

LU Wei, KE Ronghu, CAI Jun   

  1. Department of Radiology, The Fifth Hospital of Huangshi, Huangshi 435005, Hubei, P. R. China
  • Received:2019-11-29 Online:2020-05-15 Published:2020-05-15

Abstract: The 270 patients with chronic obstructive pulmonary disease(COPD)who were admitted to respiratory medicine department of our hospital from January 2014 to December 2018 were selected as the study subjects.According to different pitch and radiation dose, patients were divided into big-pitch low-dose group, small-pitch low-dose group and big-pitch conventional-dose group.To investigate the application value of big-pitch and low-dose pulmonary CT in patients with COPD. The results showed,lung parenchyma CT average deviation density values and artifacts of big-pitch low-dose group were decreased obviously while compared with small-pitch low-dose group, SNR, CNR and image quality were increased significantly while compared with small-pitch low-dose group (P<0.05).The scanning time of big-pitch low-dose group was significantly shorter than the other groups (P<0.05).CTDIvol, DLP and ED of big-pitch low-dose group were significantly lower than big-pitch conventional-dose group (P<0.05). Thus,the application value of big-pitch low-dose pulmonary CT in COPD patients is satisfying, which can significantly improve the image quality and reduce the radiation dose.

Key words: chronic obstructive pulmonary disease(COPD), pulmonary CT, big-pitch, low-dose, diagnosis