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- W2179604118 abstract "Tetraamine-[Tyr3]octreotate (Demotate) is a somatostatin (SST) analogue that can be easily labeled with 99mTc at high specific activities and showed promising preclinical properties for SST receptor scintigraphy. This study reports on the first intra-patient comparison of 99mTc-Demotate and another 99mTc-labeled SST analogue, 99mTc-EDDA/HYNIC-TOC (HYNIC-TOC). Five patients with carcinoid tumors (n = 2) and endocrine pancreatic tumors (n = 3) were investigated with both radiopharmaceuticals. 99mTc-Demotate rapidly visualized somatostatin receptor positive tumors as early as 15 minutes post-injection (p.i.) with maximum tumor uptake and tumor/organ ratios already 1 hour p.i. Organs of predominant physiological uptake were the spleen and the kidneys with no intestinal excretion detectable up to 24 hours. 99mTc-Demotate exhibited faster pharmacokinetic properties compared to HYNIC-TOC. Tumor/organ ratios at equivalent time points were higher or comparable for 99mTc-Demotate in three patients with a matching scan result. Equivocal findings were observed in two patients, i.e. comparable uptake behavior in larger lesions with differences in smaller ones. 99mTc-Demotate is a promising agent for somatostatin receptor scintigraphy providing images of excellent quality as early as 1 hour after injection." @default.
- W2179604118 created "2016-06-24" @default.
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- W2179604118 date "2004-02-01" @default.
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- W2179604118 title "<sup>99m</sup>Tc-N<sub>4</sub>-[Tyr<sup>3</sup>]Octreotate Versus <sup>99m</sup>Tc-EDDA/HYNIC-[Tyr<sup>3</sup>]Octreotide: An Intrapatient Comparison of Two Novel Technetium-99m Labeled Tracers for Somatostatin Receptor Scintigraphy" @default.
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- W2179604118 doi "https://doi.org/10.1089/108497804773391702" @default.
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