Published online before print May 30, 2002, 10.1148/radiol.2241001445
Detection of Lung Cancer on Chest Radiographs: Analysis on the Basis of Size and Extent of Ground-Glass Opacity at Thin-Section CT1
Mitsuko Tsubamoto, MD,
Keiko Kuriyama, MD,
Shoji Kido, MD,
Jun Arisawa, MD,
Nobuaki Kohno, MD,
Takeshi Johkoh, MD,
Noriyuki Tomiyama, MD,
Osamu Honda, MD and
Chikazumi Kuroda, MD
1 From the Department of Diagnostic Radiology, Osaka Medical Center for Cancer and Cardiovascular Diseases, Japan (M.T., K.K., J.A., C.K.); Department of Computer Science and Systems Engineering, Yamaguchi University, Japan (S.K.); Department of Radiology, Osaka Chuo Hospital, Japan (N.K.); and Department of Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan (M.T., T.J., N.T., O.H.). Received August 25, 2000; revision requested October 14; final revision received September 20, 2001; accepted December 11. Address correspondence to M.T. (e-mail: tubamoto@radiol.med.osaka-u.ac.jp).
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Figure 1a. (a) Posteroanterior chest radiograph of a tumor in group 1. In this case, the tumor (arrows) was visible on the chest radiograph because although it had low opacity it was large enough to be seen. (b) Transverse thin-section CT image of the same tumor. The tumor was BAC. The size of the tumor (arrow) was 20 mm, and the extent of GGO was 90%.
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Figure 1b. (a) Posteroanterior chest radiograph of a tumor in group 1. In this case, the tumor (arrows) was visible on the chest radiograph because although it had low opacity it was large enough to be seen. (b) Transverse thin-section CT image of the same tumor. The tumor was BAC. The size of the tumor (arrow) was 20 mm, and the extent of GGO was 90%.
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Figure 2a. (a) Posteroanterior chest radiograph of a tumor in group 2. In this case, the tumor (arrows) was visible on the chest radiograph because it was opaque and large. (b) Transverse thin-section CT image of the same tumor. The tumor (arrow) was BAC. The size of the tumor was 18 mm, and the extent of GGO was 12%.
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Figure 2b. (a) Posteroanterior chest radiograph of a tumor in group 2. In this case, the tumor (arrows) was visible on the chest radiograph because it was opaque and large. (b) Transverse thin-section CT image of the same tumor. The tumor (arrow) was BAC. The size of the tumor was 18 mm, and the extent of GGO was 12%.
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Figure 3a. (a) Posteroanterior chest radiograph of a tumor in group 3. The tumor was difficult to detect on the radiograph because the lesion was small and faint. The arrow indicates the location where the lesion is thought to lie. (b) Transverse thin-section CT image of the same tumor. The tumor (arrow) was BAC. The size of the tumor was 12 mm, and the extent of GGO was 95%.
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Figure 3b. (a) Posteroanterior chest radiograph of a tumor in group 3. The tumor was difficult to detect on the radiograph because the lesion was small and faint. The arrow indicates the location where the lesion is thought to lie. (b) Transverse thin-section CT image of the same tumor. The tumor (arrow) was BAC. The size of the tumor was 12 mm, and the extent of GGO was 95%.
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Figure 4a. (a) Posteroanterior chest radiograph of a tumor in group 4. In this case, the tumor (arrows) was visible on the chest radiograph because it was small but opaque. (b) Transverse thin-section CT image of the same tumor. The tumor (arrow) was BAC. The size of the tumor was 8 mm, and the extent of GGO was 50%.
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Figure 4b. (a) Posteroanterior chest radiograph of a tumor in group 4. In this case, the tumor (arrows) was visible on the chest radiograph because it was small but opaque. (b) Transverse thin-section CT image of the same tumor. The tumor (arrow) was BAC. The size of the tumor was 8 mm, and the extent of GGO was 50%.
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Copyright © 2002 by the Radiological Society of North America.
