Published online before print September 19, 2002, 10.1148/radiol.2252011568
PET Diagnostic Accuracy: Improvement with In-Line PET-CT System: Initial Results1
Thomas F. Hany, MD,
Hans C. Steinert, MD,
Gerhard W. Goerres, MD,
Alfred Buck, MD and
Gustav K. von Schulthess, MD, PhD
1 From the Department of Medical Radiology, Division of Nuclear Medicine, University Hospital Zurich, Rämistrasse 100, 8091 Zurich, Switzerland. Received September 21, 2001; revision requested December 3; final revision received March 14, 2002; accepted April 10. Supported in part by GE Medical Systems, Buc, France, and the Radium Foundation, University of Zurich, Switzerland. Address correspondence to T.F.H. (e-mail: thomas.hany@dmr.usz.ch).
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Figure 1a. Left-sided intrapulmonary mass (sarcomatoid tumor) in a 76-year-old male patient. (a) Transverse FDG PET image shows pathologic uptake of FDG (arrow in a-e) in the infracarinal region and physiologic uptake of FDG (arrowhead in a-e) in the heart. (b) Transverse PET-10-mA CT scan at the same level as a shows the tumor to be in the left atrium. (c) PET-40-mA CT, (d) PET-80-mA CT, and (e) PET-120-mA CT images at the same level as a and b do not give additional information.
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Figure 1b. Left-sided intrapulmonary mass (sarcomatoid tumor) in a 76-year-old male patient. (a) Transverse FDG PET image shows pathologic uptake of FDG (arrow in a-e) in the infracarinal region and physiologic uptake of FDG (arrowhead in a-e) in the heart. (b) Transverse PET-10-mA CT scan at the same level as a shows the tumor to be in the left atrium. (c) PET-40-mA CT, (d) PET-80-mA CT, and (e) PET-120-mA CT images at the same level as a and b do not give additional information.
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Figure 1c. Left-sided intrapulmonary mass (sarcomatoid tumor) in a 76-year-old male patient. (a) Transverse FDG PET image shows pathologic uptake of FDG (arrow in a-e) in the infracarinal region and physiologic uptake of FDG (arrowhead in a-e) in the heart. (b) Transverse PET-10-mA CT scan at the same level as a shows the tumor to be in the left atrium. (c) PET-40-mA CT, (d) PET-80-mA CT, and (e) PET-120-mA CT images at the same level as a and b do not give additional information.
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Figure 1d. Left-sided intrapulmonary mass (sarcomatoid tumor) in a 76-year-old male patient. (a) Transverse FDG PET image shows pathologic uptake of FDG (arrow in a-e) in the infracarinal region and physiologic uptake of FDG (arrowhead in a-e) in the heart. (b) Transverse PET-10-mA CT scan at the same level as a shows the tumor to be in the left atrium. (c) PET-40-mA CT, (d) PET-80-mA CT, and (e) PET-120-mA CT images at the same level as a and b do not give additional information.
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Figure 1e. Left-sided intrapulmonary mass (sarcomatoid tumor) in a 76-year-old male patient. (a) Transverse FDG PET image shows pathologic uptake of FDG (arrow in a-e) in the infracarinal region and physiologic uptake of FDG (arrowhead in a-e) in the heart. (b) Transverse PET-10-mA CT scan at the same level as a shows the tumor to be in the left atrium. (c) PET-40-mA CT, (d) PET-80-mA CT, and (e) PET-120-mA CT images at the same level as a and b do not give additional information.
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Figure 2. Right-sided bronchial carcinoma at initial staging examination in a 60-year-old female patient with a history of left-sided poliomyelitis as a child. A, Transverse FDG PET image shows two mediastinal lymph nodes (arrow in A-C and arrowhead in A) on the ipsilateral right side. B, Transverse PET-10-mA CT scan. C, Transverse PET-120-mA CT scan. D, Coronal PET-10-mA CT scan. In B and D, a contralateral lymph node (arrowhead in B-D) causes the disease stage to be changed from IIIA to IIIB. No additional information is provided in C.
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Figure 3a. Left-sided non-small cell lung cancer in a 65-year-old male patient was diagnosed at percutaneous biopsy. (a, b) Images obtained at two levels. Top: Transverse PET images. Middle: Transverse 10-mA CT images. Bottom: PET-10-mA CT images. PET images alone depicted possible bilateral rib metastases (arrows in a and long arrows in b). A mediastinal metastasis (short arrows in b) was also seen. With PET-10-mA CT, it became evident that the right-sided lesion (arrowheads in a) had an intrapulmonary location, and the left-sided lesion (arrows in a) was located within the scapula. The mediastinal metastasis was localized correctly (small arrows in b), as seen in the fusion images. In this case, staging with PET alone or with PET-CT did not change. Additional information at CT revealed a left-sided pleural effusion.
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Figure 3b. Left-sided non-small cell lung cancer in a 65-year-old male patient was diagnosed at percutaneous biopsy. (a, b) Images obtained at two levels. Top: Transverse PET images. Middle: Transverse 10-mA CT images. Bottom: PET-10-mA CT images. PET images alone depicted possible bilateral rib metastases (arrows in a and long arrows in b). A mediastinal metastasis (short arrows in b) was also seen. With PET-10-mA CT, it became evident that the right-sided lesion (arrowheads in a) had an intrapulmonary location, and the left-sided lesion (arrows in a) was located within the scapula. The mediastinal metastasis was localized correctly (small arrows in b), as seen in the fusion images. In this case, staging with PET alone or with PET-CT did not change. Additional information at CT revealed a left-sided pleural effusion.
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Copyright © 2002 by the Radiological Society of North America.
