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| Hauptseite > Publikationsdatenbank > The usefulness of dynamic O-(2-18F-Fluoroethyl)-L-Tyrosine PET in the clinical evaluation of brain tumors in childrenand adolescents. > print |
| Hauptseite > Publikationsdatenbank > The usefulness of dynamic O-(2-18F-Fluoroethyl)-L-Tyrosine PET in the clinical evaluation of brain tumors in childrenand adolescents. > print |
| 001 | 186057 | ||
| 005 | 20210129214811.0 | ||
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| 245 | _ | _ | |a The usefulness of dynamic O-(2-18F-Fluoroethyl)-L-Tyrosine PET in the clinical evaluation of brain tumors in childrenand adolescents. |
| 260 | _ | _ | |a Reston, Va. |c 2015 |b SNM |
| 264 | _ | 1 | |3 online |2 Crossref |b Society of Nuclear Medicine |c 2014-12-18 |
| 264 | _ | 1 | |3 print |2 Crossref |b Society of Nuclear Medicine |c 2015-01-01 |
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| 520 | _ | _ | |a Experience regarding O-(2-18F-fluoroethyl)-l-tyrosine (18F-FET) PET in children and adolescents with brain tumors is limited. Methods: Sixty-nine 18F-FET PET scans of 48 children and adolescents (median age, 13 y; range, 1–18 y) were analyzed retrospectively. Twenty-six scans to assess newly diagnosed cerebral lesions, 24 scans for diagnosing tumor progression or recurrence, 8 scans for monitoring of chemotherapy effects, and 11 scans for the detection of residual tumor after resection were obtained. Maximum and mean tumor-to-brain ratios (TBRs) were determined at 20–40 min after injection, and time–activity curves of 18F-FET uptake were assigned to 3 different patterns: constant increase; peak at greater than 20–40 min after injection, followed by a plateau; and early peak (≤20 min), followed by a constant descent. The diagnostic accuracy of 18F-FET PET was assessed by receiver-operating-characteristic curve analyses using histology or clinical course as a reference. Results: In patients with newly diagnosed cerebral lesions, the highest accuracy (77%) to detect neoplastic tissue (19/26 patients) was obtained when the maximum TBR was 1.7 or greater (area under the curve, 0.80 ± 0.09; sensitivity, 79%; specificity, 71%; positive predictive value, 88%; P = 0.02). For diagnosing tumor progression or recurrence, the highest accuracy (82%) was obtained when curve patterns 2 or 3 were present (area under the curve, 0.80 ± 0.11; sensitivity, 75%; specificity, 90%; positive predictive value, 90%; P = 0.02). During chemotherapy, a decrease of TBRs was associated with a stable clinical course, and in 2 patients PET detected residual tumor after presumably complete tumor resection. Conclusion: Our findings suggest that 18F-FET PET can add valuable information for clinical decision making in pediatric brain tumor patients. |
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