Keywords:
Digital radiography, CT-High Resolution, Conventional radiography, Lung
Authors:
S. Yun, J. W. Kim, S. S. Kim, J. E. Lee; Daejeon/KR
DOI:
10.1594/ecr2011/C-0724
Results
Among 46 patients.
9 patients (9/46,
20%) had no abnormality in their CT scans.
The group 3 was predominant group including 21 patients (21/46,
46%),
followed by group 2 (10/46,
22%),
and group 1 (6/46,
13%) (table 1).
- Bronchial wall thickening,
often associated with consolidation or ground-glass opacities,
are predominant CT findings.
Even though in patients who have abnormal chest CT findings,
13 patients were normal in their chest radiographs (13/37,
35%).
All of 6 patients in group 1 were predominant (46%,
6/13) compared with 15% (2/13) in group 2 and 38% (5/13) in group 3 (table 2).
- If the lesion is limited to airway,
initial chest radiographs are often normal.
Lymphadenopathy were also seen in 24% (11/37%).
Pleural effusion were seen on CT in 24% (11/37).
Diffuse lung involvement was seen in 65% (24/37),
followed by focal (9/37,
24%),
and multifocal (4/37,
11%) (table 3).
Table 1.
Pattern of CT findings
pattern of CT findings
|
NO.patients = 46
|
Percent
|
normal
|
9
|
20
|
abnormal
|
|
|
A.
airway involvement
|
6
|
13
|
bronchial wall thickening
|
6
|
13
|
B.
airspace involvement
|
10
|
22
|
ground-glass opacities (GGO)
|
5
|
11
|
consolidation + GGO
|
5
|
11
|
C.
both airway and airspace involvement
|
21
|
46
|
bronchial wall thickening + consolidation
|
4
|
9
|
bronchial wall thickening + GGO
|
3
|
7
|
bronchial wall thickening + consolidation + GGO
|
6
|
13
|
bronchial wall thickening + GGO + centrilobular nodules
|
3
|
7
|
bronchial wall thickening + GGO + consolidation + centrilobular nodules
|
5
|
11
|
Table 2. Abnormality of first chest radiograph within each groups
finding
|
abnormal CT finding
|
Group 1
|
Group 2
|
Group 3
|
total
|
normal CXR
|
6
|
2
|
5
|
13(35)
|
abnormal CXR
|
0
|
8
|
16
|
24(65)
|
total
|
37
|
37
|
P= 0.001
CXR,
chest radiograph
Numbers in parentheses represent percentage
Table 3. Associated CT findings and extent
|
NO.
patients = 37
|
Percent
|
associated CT findings
|
|
|
pleural effusion
|
|
|
unilateral
|
5
|
14
|
bilateral
|
6
|
16
|
absent
|
26
|
70
|
lymphadenopathy
|
|
|
present
|
11
|
30
|
absent
|
26
|
70
|
extent
|
|
|
focal
|
9
|
24
|
multifocal
|
4
|
11
|
diffuse
|
24
|
65
|