1.Application of dual-energy subtraction technique in diagnosis of occupational pneumoconiosis
xie yuanlin ; huang liming ; deng xuening
China Occupational Medicine 2022;49(2):206-210
Objective To explore the application value of chest dual-energy subtraction (DES) technology in the diagnosis of
occupational pneumoconiosis. Methods A total of 86 patients with suspected pneumoconiosis and 21 dust-exposure workers
were selected as the research subjects using random sampling method. The posterior and anterior chest radiographs were taken
by digital radiography (DR) and DES technology, and the difference of chest radiographs of DR, DES and combined groups were
compared. Results The positive rate of superior chest radiographs in DR group was higher than that in DES group (72.9% vs
56.1%, P<0.05). The determination of shadow shape and size, total density and stage of pneumoconiosis on chest radiographs in
DES group and combined group were consistent with those in DR group (all Kappa values >0.75, all P<0.01). However, the
judgment of small shadow intensity, small shadow aggregation and large shadow distribution in the two groups were not superior
to those in the DR group (Kappa value was 0.67, 0.74, both P<0.01). There was no significant difference between DES group and
DR group in the determination of small shadow intensity, small shadow aggregation and large shadow distribution (P>0.05).
However, there were statistically significant difference in this index between the combined group and DES group and DR group
(all P<0.01). There was no statistically significant difference in shadow shape and size, total density and stage of pneumoconiosis
in chest radiographs among these three groups (all P>0.05). Conclusion There was no difference between DES alone and DES
combined with DR for the diagnosis of pneumoconiosis in terms of shadow shape and size, total density and stage of
pneumoconiosis when compared with the gold standard DR. The value of DES in the diagnosis of pneumoconiosis needs further
study.