ABSTRACT
Objective To investigate the value of chest CT in the early diagnosis of mycoplasma pneumonia (MP) complicated with streptococcus pneumonia (SP) in children. Methods Seventy- eight children with pneumonia were selected, among them pneumonia mycoplasma IgM positive but pneumonia streptococcus hemoculture negative was in 45 cases (control group), and pneumonia mycoplasma IgM and pneumonia streptococcus hemoculture positive was in 33 cases (observation group). The chest CT performance was compared between 2 groups. Results The incidences of ground- glass opacity, bronchial wall thickening, branch pipe bundle thickening and reticular shadow in observation group were significantly lower than those in control group: 15.15% (5/33) vs. 73.33% (33/45), 42.42% (14/33) vs. 100.00%(45/45), 33.33%(11/33) vs. 86.67%(39/45) and 36.36%(12/33) vs. 80.00%(36/45), and there were statistical differences (P0.05). The pleural effusion incidences, pleural effusion thickness and lymph node transverse diameter in observation group were significantly higher than those in control group:42.42%(14/33) vs. 15.56%(7/45), (13.50 ± 6.81) mm vs. (3.22 ± 1.14) mm and (11.18 ± 2.43) mm vs. (2.91 ± 0.84) mm, and there were statistical differences (P<0.01 or<0.05). The incidences of lymph node shadow in 2 groups were 100.00% (33/33 and 45/45). The incidence of irregular pulmonary real change shadow in observation group was significantly higher than that in control group: 81.82%(27/33) vs. 26.67% (12/45), and there was statistical difference (P<0.01). Conclusions Simple MP and MP complicated with SP in children has different CT manifestations, and the chest CT examination has certain value in the differential diagnosis.
ABSTRACT
Objective To evaluate the value of low dose multilayer spiral CT (MSCT) threedimensional reconstruction in diagnosis of children tracheobronchial foreign body.Methods Forty-three children with tracheobronchial foreign body which was confirmed by fiberoptic bronchoscopy were enrolled,and all of the children underwent low dose MSCT three-dimensional reconstruction.The volume data were reconstructed on work station (Siemens) with the techniques of multiple plane reformation (MPR),curved planar reconstruction (CPR),minimum intensity projection (MinIP),volume rendering (VR),CT virtual bronchoscopy (CTVB),and the results of MSCT were compared with fiberoptic bronchoscopy.Results The fiberoptic bronchoscopy results were used as the localization and qualitative diagnosis results.Locations of the foreign body were trachea and bifurcation of trachea (6 cases),right bronchus (23 cases) and left bronchus (14 cases),and the coincidence rate of localization diagnosis of MSCT was 100％ (43/43).Natures of the foreign body were nuts in 21 cases,beans in 5 cases,corn in 2 cases,fruits and vegetables in 6 cases,and other kinds in 4 cases.Qualitative diagnosis by MSCT was medium density foreign body,and the coincidence rate was 100％ (38/38).Five cases had bone mass,qualitative diagnosis by MSCT was high density bony foreign body,and the coincidence rate was 5/5.In 43 children,MPR (CPR) showed 41 cases (95.3％),CTVB showed 33 cases (76.7％),MinIP showed 34 cases (79.1％),VR showed 23 cases (53.5％),and axial scan showed 21 cases (48.8％).MPR (CPR) in showing foreign body rate was higher than other several postprocessing methods,and there were statistical differences (P ＜ 0.05).There was no statistical difference in the showing of foreign body between CTVB and MinIP (P ＞ 0.05),but CTVB and MinIP were higher than VR and axial scan,and there were statistical differences (P ＜ 0.05).Conclusions Low dose MSCT three-dimensional reconstruction is satisfactory in the diagnosis of children tracheobronchial foreign body.It can accurately evaluate the exact size,location,shape and pulmonary complications of foreign body,thus it plays an important role in the diagnosis of suspicious tracheobronchial foreign body.
