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3-T MRI: Usefulness for Evaluating Primary Lung Cancer and Small Nodules in Lobes Not Containing Primary Tumors

¹ Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Gangnam-gu, Seoul 135-710, Korea.
² Department of Radiology and Medical Imaging Laboratory, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.

View larger version (100K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 1A —68-year-old man with pleomorphic carcinoma in lower lobe of right lung and calcified small nodules in lobe not containing primary tumor. Transverse enhanced CT scan (5.0-mm thickness) at level of great vessels shows diffusely calcified (arrows) and noncalcified (arrowhead) nodules in right upper lobe, which proved to be benign granuloma on serial CT scans.

View larger version (122K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 1B —68-year-old man with pleomorphic carcinoma in lower lobe of right lung and calcified small nodules in lobe not containing primary tumor. Transverse T1-weighted 3D turbo field-echo image at same level as A clearly shows diffusely calcified (arrows) and noncalcified (arrowhead) nodules with slightly higher signal intensity than chest wall muscle.

View larger version (131K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 1C —68-year-old man with pleomorphic carcinoma in lower lobe of right lung and calcified small nodules in lobe not containing primary tumor. T2-weighted triple inversion black blood turbo spin-echo image shows diffusely calcified nodules (arrows) are not clearly delineated; one calcified nodule is not identifiable. Noncalcified nodule (arrowhead) has higher signal intensity than chest wall muscle.

View larger version (142K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 2A —46-year-old man with adenocarcinoma in upper lobe of right lung and biopsy-proven metastatic nodule in lower lobe of right lung. Transverse lung-window CT scan at level of right upper lobar bronchus shows 5-mm nodule (arrow) in superior segment of right lower lobe. Nodule was pathologically proven metastatic adenocarcinoma. Bottom portion of primary lung adenocarcinoma (arrowheads) is evident in right upper lobe.

View larger version (107K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 2B —46-year-old man with adenocarcinoma in upper lobe of right lung and biopsy-proven metastatic nodule in lower lobe of right lung. T1-weighted 3D turbo field-echo (B) and T2-weighted triple inversion black blood turbo spin-echo (C) images show 5-mm nodule (straight arrow) in superior segment of right lower lobe. Nodule in C appears to have higher signal intensity than nodule in B. Primary adenocarcinoma (arrowheads) is present in right upper lobe. New triangular lesion (curved arrow) posterior to primary malignant nodule is result of hemorrhage caused by percutaneous needle aspiration biopsy.

View larger version (115K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 2C —46-year-old man with adenocarcinoma in upper lobe of right lung and biopsy-proven metastatic nodule in lower lobe of right lung. T1-weighted 3D turbo field-echo (B) and T2-weighted triple inversion black blood turbo spin-echo (C) images show 5-mm nodule (straight arrow) in superior segment of right lower lobe. Nodule in C appears to have higher signal intensity than nodule in B. Primary adenocarcinoma (arrowheads) is present in right upper lobe. New triangular lesion (curved arrow) posterior to primary malignant nodule is result of hemorrhage caused by percutaneous needle aspiration biopsy.

View larger version (127K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 3A —58-year-old man with squamous cell carcinoma in right upper lobe and biopsy-proven anthracofibrotic nodule in lobe not containing primary tumor. Transverse lung-window CT scan at level of basal segmental bronchus shows 9-mm subpleural nodule (arrow) in right middle lobe. Nodule was pathologically proven anthracofibrotic nodule.

View larger version (107K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 3B —58-year-old man with squamous cell carcinoma in right upper lobe and biopsy-proven anthracofibrotic nodule in lobe not containing primary tumor. T1-weighted 3D turbo field-echo (B) and T2-weighted triple inversion black blood turbo spin-echo (C) images show 9-mm nodule (arrow) in right middle lobe. Nodule is subtle in C and not easily visualized.

View larger version (88K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 3C —58-year-old man with squamous cell carcinoma in right upper lobe and biopsy-proven anthracofibrotic nodule in lobe not containing primary tumor. T1-weighted 3D turbo field-echo (B) and T2-weighted triple inversion black blood turbo spin-echo (C) images show 9-mm nodule (arrow) in right middle lobe. Nodule is subtle in C and not easily visualized.

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