| Title | Prognostic value of post-Yttrium 90 radioembolization therapy 18F-fluorodeoxyglucose positron emission tomography in patients with liver tumors. |
|---|---|
| Authors | Obrzut, S.; McCammack, K.; Badran, K.W.; Balistreri, A.; Ou, E.; Nguyen, B.J.; Hoh, C.K.; Rose, S.C. |
| Journal | Clin Imaging |
| DOI | 10.1016/j.clinimag.2016.11.009 |
| Abstract |
OBJECTIVE: This study assessed the benefit of post-therapy (18)F-FDG PET/CT versus CT alone in identifying malignant liver tumor progression following radioembolization with Y-90 microspheres. METHODS: 24 patients with 44 liver tumors underwent CT imaging pre-radioembolization and PET/CT post-radioembolization. Predictive value of Response Evaluation Criteria in Solid Tumors (RECIST 1.1), The World Health Organization (WHO), mRECIST and European Association for the Study of the Liver (EASL) with PET/CT versus CT alone was assessed. RESULTS: Prediction of liver malignancy progression was improved (p0.05) for tumors labeled as non-responding based on combined PET/CT with RECIST 1.1, WHO, mRECIST, and EASL criteria compared to assessment without PET. CONCLUSIONS: The addition of post-therapy PET to routine CT in patients with hepatic tumors undergoing radioembolization may improve identification of non-responding tumors. |
See more Yttrium products. Yttrium (atomic symbol: Y, atomic number: 39) is a Block D, Group 3, Period 5 element with an atomic weight of 88.90585. 
The number of electrons in each of yttrium's shells is [2, 8, 18, 9, 2] and its electron configuration is [Kr] 4d1 5s2. The yttrium atom has a radius of 180 pm and a Van der Waals radius of 219 pm. Yttrium was discovered by Johann Gadolin in 1794 and first isolated by Carl Gustav Mosander in 1840. In its elemental form, Yttrium has a silvery white metallic appearance. Yttrium has the highest thermodynamic affinity for oxygen of any element. 
Yttrium is not found in nature as a free element and is almost always found combined with the lanthanides in rare earth minerals. While not part of the rare earth series, it resembles the heavy rare earths which are sometimes referred to as the "yttrics" for this reason. Another unique characteristic derives from its ability to form crystals with useful properties. The name yttrium originated from a Swedish village near Vaxholm called Yttbery where it was discovered.