BJR
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
This Article
Right arrow Abstract Freely available
Right arrow Full Text
Right arrow Full Text (PDF)
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Yang, Z-G
Right arrow Articles by Hasegawa, M
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Yang, Z-G
Right arrow Articles by Hasegawa, M

Visibility of small peripheral lung cancers on chest radiographs: influence of densitometric parameters, CT values and tumour type

Z-G Yang, MD 1 S Sone, MD 1 F Li, MD 1 S Takashima, MD 1 Y Maruyama, MD 1 T Honda, MD 2 and M Hasegawa, MD 1

1 Departments of Radiology 2 Laboratory Medicine, Shinshu University School of Medicine, Asahi, Matsumoto, 390 8621, Japan



View larger version (80K):

[in a new window]
  		Figure 1. 67-year-old male smoker with squamous cell carcinoma (16 mmx16 mm) in the apical segment of the right lower lobe, with hilic growth pattern. (a) Low dose CT shows a small nodule (arrow). (b) High resolution CT shows a homogeneous solid tissue density nodule (arrow). (c) Histopathological examination of the tumour shows hilic (solid) tumour growth (H&E stain; original magnificationx1.25). (d) Close-up view of the posteroanterior chest radiograph shows the lung nodule (arrow). (e) Optical densitometric measurement of visible tumour on the chest radiograph. The contrast and gradient values are 0.21 OD and 0.11 OD mm-1, respectively, which corresponds to the histopathological findings of hilic tumour growth.

 


View larger version (119K):

[in a new window]
  		Figure 2. 56-year-old male smoker with a well differentiated type A adenocarcinoma (11 mmx12 mm) in the apical segment of the right lower lobe, with lepidic growth pattern. (a) Low dose CT shows a small faint lesion (arrow). (b) High resolution CT shows a ground-glass attenuation nodule through which the small vessels are visible (arrow). (c) Histopathological examination shows alveolar lining tumour growth without alveolar collapse (H&E stain; original magnificationx1.25). (d) Close-up view of the posteroanterior chest radiograph shows no evidence of the nodule in the middle zone of the right lung field.

 


View larger version (90K):

[in a new window]
  		Figure 3. 33-year-old male non-smoker with a well differentiated type B adenocarcinoma (8 mmx9 mm) in the apical segment of the left lower lobe, with lepidic growth pattern. (a) Low dose CT shows a small, faint lesion (arrow). (b) High resolution CT shows a heterogeneous, low attenuation nodule (arrow). (c) Histopathological examination shows alveolar lining tumour growth with scattered foci of alveolar collapse (H&E stain; original magnificationx1.25). (d) Close-up view of the posteroanterior chest radiograph shows no evidence of the nodule in the middle zone of the left lung field.

 


View larger version (11K):

[in a new window]
  		Figure 4. Relationship between tumour size and the difference in CT values between the tumour and its surrounding lung parenchyma ({Delta}CT) in visible and invisible tumours in cases detected on CT screening and those detected clinically. The detection rates onchest radiographs were 18% (4/22) for tumours <=10 mm in diameter and 66% (27/41) for tumours 11–20 mm in diameter, and 8% (2/24) fortumours <=400 HU {Delta}CT and 74% (29/39) fortumours >400 HU {Delta}CT. {triangleup}, Invisible tumour in CT screening group; {blacktriangleup}, visible tumour in CT screening group; {circ}, invisible tumour in clinical group; •, visible tumour in clinical group.

 




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
BJR DMFR IMAGING  ALL BIR JOURNALS 
Copyright © 2001 by the British Institute of Radiology.