Low-Dose High-Resolution CT of the Chest in Children and Young Adults
Dose, Cooperation, Artifact Incidence, and Image Quality
Javier Lucaya1,2,
Joaquim Piqueras1,
Pilar García-Peña1,
Goya Enríquez1,
Maribel García-Macías1 and
Jesús Sotil3
1
Radiology Department, HMI-Vall d'Hebron Hospitals, ps. Vall d'Hebron 119-129,
08035 Barcelona, Spain.
2
Institute of Diagnostic Imaging, Vall d'Hebron Hospitals, 08035 Barcelona,
Spain.
3
Radiation Protection Department, Vall d'Hebron Hospitals, 08035 Barcelona,
Spain.
View larger version (134K):
[in a new window]
|
Fig. 1A. —3-month-old female infant with bronchopulmonary dysplasia.
High-resolution CT scans of chest obtained with 50 mAs (A) (average
image quality score, 2.36) and with 180 mAs (B) (average image quality
score, 2.57) reveal no significant difference in image quality between
A and B. Interstitial thickening and areas of hyperlucent lung
(arrows) producing pseudocystic appearance are clearly visible on
both images.
|
|
View larger version (132K):
[in a new window]
|
Fig. 1B. —3-month-old female infant with bronchopulmonary dysplasia.
High-resolution CT scans of chest obtained with 50 mAs (A) (average
image quality score, 2.36) and with 180 mAs (B) (average image quality
score, 2.57) reveal no significant difference in image quality between
A and B. Interstitial thickening and areas of hyperlucent lung
(arrows) producing pseudocystic appearance are clearly visible on
both images.
|
|
View larger version (128K):
[in a new window]
|
Fig. 2A. —11-year-old boy with pulmonary histiocytosis X. High-resolution CT
scans of chest obtained with 34 mAs (A) (average image quality score,
4.07) and 180 mAs (B) (average image quality score, 4.01) show
widespread thin-walled, air-filled cysts (arrows). Fissures appear
sharper in B than in A.
|
|
View larger version (120K):
[in a new window]
|
Fig. 2B. —11-year-old boy with pulmonary histiocytosis X. High-resolution CT
scans of chest obtained with 34 mAs (A) (average image quality score,
4.07) and 180 mAs (B) (average image quality score, 4.01) show
widespread thin-walled, air-filled cysts (arrows). Fissures appear
sharper in B than in A.
|
|
View larger version (134K):
[in a new window]
|
Fig. 3A. —12-year-old boy with cystic fibrosis. High-resolution CT scans of
chest obtained with 34 mAs (A) (image quality average score, 4.40) and
180 mAs (B) (average image quality score, 4.33) show peribronchial
thickening (curved arrows), bronchiectasis, and tree-in-bud
appearance of peripheral bronchi (straight arrows).
|
|
View larger version (130K):
[in a new window]
|
Fig. 3B. —12-year-old boy with cystic fibrosis. High-resolution CT scans of
chest obtained with 34 mAs (A) (image quality average score, 4.40) and
180 mAs (B) (average image quality score, 4.33) show peribronchial
thickening (curved arrows), bronchiectasis, and tree-in-bud
appearance of peripheral bronchi (straight arrows).
|
|
View larger version (131K):
[in a new window]
|
Fig. 4A. —13-year-old boy who was examined to rule out bronchiectases. Images
show normal findings. High-resolution CT scan of chest obtained with 34 mAs
(average image quality score, 4.58) shows that depiction and sharpness of lung
structures are good. Noise, best identified in low-contrast structures of
mediastinum and chest wall, is more evident in this image than in
B.
|
|
View larger version (120K):
[in a new window]
|
Fig. 4B. —13-year-old boy who was examined to rule out bronchiectases. Images
show normal findings. High-resolution CT scan of chest obtained with 180 mAs
(average image quality score, 4.50) shows several streak artifacts
(arrows).
|
|
CiteULike 
Complore 
Connotea 
Del.icio.us 
Digg 
Reddit 
Technorati What's this?
Copyright © 2000 by the American Roentgen Ray Society.
