Impact of computer-aided CT and PET analysis on non-invasive T staging in patients with lung cancer and atelectasis
PURPOSE: Tumor delineation within an atelectasis in lung cancer patients is not always accurate. When T staging is done by integrated 2-deoxy-2-[18F]fluoro-D-glucose ([18F]FDG)-positron emission tomography (PET)/X-ray computer tomography (CT), tumors of neuroendocrine differentiation and slowly grow...
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| Hauptverfasser: | , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
20 December 2018
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| In: |
Molecular imaging & biology
Year: 2018, Jahrgang: 20, Heft: 6, Pages: 1044-1052 |
| ISSN: | 1860-2002 |
| DOI: | 10.1007/s11307-018-1196-9 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1007/s11307-018-1196-9
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| Verfasserangaben: | Paul Flechsig, Ramin Rastgoo, Clemens Kratochwil, Ole Martin, Tim Holland-Letz, Alexander Harms, Hans-Ulrich Kauczor, Uwe Haberkorn & Frederik L. Giesel |
MARC
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| 245 | 1 | 0 | |a Impact of computer-aided CT and PET analysis on non-invasive T staging in patients with lung cancer and atelectasis |c Paul Flechsig, Ramin Rastgoo, Clemens Kratochwil, Ole Martin, Tim Holland-Letz, Alexander Harms, Hans-Ulrich Kauczor, Uwe Haberkorn & Frederik L. Giesel |
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| 520 | |a PURPOSE: Tumor delineation within an atelectasis in lung cancer patients is not always accurate. When T staging is done by integrated 2-deoxy-2-[18F]fluoro-D-glucose ([18F]FDG)-positron emission tomography (PET)/X-ray computer tomography (CT), tumors of neuroendocrine differentiation and slowly growing tumors can present with reduced FDG uptake, thus aggravating an exact T staging. In order to further exhaust information derived from [18F]FDG-PET/CT, we evaluated the impact of CT density and maximum standardized uptake value (SUVmax) for the classification of different tumor subtypes within a surrounding atelectasis, as well as possible cutoff values for the differentiation between the primary tumor and atelectatic lung tissue. - PROCEDURES: Seventy-two patients with histologically proven lung cancer and adjacent atelectasis were investigated. Non-contrast-enhanced [18F]FDG-PET/CT was performed within 2 weeks before surgery/biopsy. Boundaries of the primary within the atelectasis were determined visually on the basis of [18F]FDG uptake; CT density was quantified manually within each primary and each atelectasis. - RESULTS: CT density of the primary (36.4 Hounsfield units (HU) ± 6.2) was significantly higher compared to that of atelectatic lung (24.3 HU ± 8.3; p < 0.01), irrespective of the histological subtype. The discrimination between different malignant tumors using density analysis failed. SUVmax was increased in squamous cell carcinomas compared to adenocarcinomas. Irrespective of the malignant subtype, a possible cutoff value of 24 HU may help to exclude the presence of a primary in lesions below 24 HU, whereas a density above a threshold of 40 HU can help to exclude atelectatic lung. - CONCLUSION: Density measurements in patients with lung cancer and surrounding atelectasis may help to delineate the primary tumor, irrespective of the specific lung cancer subtype. This could improve T staging and radiation treatment planning (RTP) without additional application of a contrast agent in CT, or an additional magnetic resonance imaging (MRI), even in cases of lung tumors of neuroendocrine differentiation or in slowly growing tumors with less avidity to [18F]FDG. | ||
| 650 | 4 | |a Aged | |
| 650 | 4 | |a Area Under Curve | |
| 650 | 4 | |a Computed tomography | |
| 650 | 4 | |a FDG-PET/CT | |
| 650 | 4 | |a Female | |
| 650 | 4 | |a Fluorodeoxyglucose F18 | |
| 650 | 4 | |a Humans | |
| 650 | 4 | |a Lung cancer | |
| 650 | 4 | |a Lung Neoplasms | |
| 650 | 4 | |a Male | |
| 650 | 4 | |a Neoplasm Staging | |
| 650 | 4 | |a Positron Emission Tomography Computed Tomography | |
| 650 | 4 | |a Pulmonary Atelectasis | |
| 650 | 4 | |a ROC Curve | |
| 650 | 4 | |a Staging | |
| 650 | 4 | |a Tomography, X-Ray Computed | |
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