Following administration of 2.5-5.0 mCi f 9mTc]pertechnetate, several hundred microcuries may be present in the necks of hyperthyroid patients after 6 hr. Coincidence summing of Tc-99m photons may disturb 1-131 uptake measurements in such patients if an oral diagnostic dose of 1-131 is administered immediately after completion of a f 9mTc]pertechnetate scintigram. Using a lower discriminator le...

Introduction: This study was done to determine the site of obstruction in lacrimal drainage system in Asian patients suffering from epiphora and to determine the transit time taken for the tracer material to reach the lacrimal sac and the nasal cavity. Methods:Dacryoscintigraphy was performed using radionuclide technetium-99m pertechnetate (99m...

Abstract Pretreated silica sand labeling using varying concentrations of tin(II) fluoride and chloride as reducing agents different times was performed in order to develop a methodology for with 99m Tc solid radiotracer. Influence pretreatment parameters on the sorption yield (R ret% ) statistically evaluated. The effectiveness methods used reduce pertechnetate ( TcO 4 − by ascending paper chro...

This study investigated the microleakage of two different root canal obturation systems, using the nuclear medicine approach, with sodium pertechnetate Tc. Twenty six single-rooted extracted teeth were selected. The crowns were sectioned to obtain 15 mm long root segments and each tooth was prepared using rotary ProFile instruments. The roots were divided into 2 experimental groups and two cont...

Twelve patients with solitary autonomous thyroid nodules were scanned with [99mTc] pertechnetate and by fluorescent imaging. Nodular dimensions were essentially identical on the two types of scans, but the relative scan densities in the nodular versus extranodular areas demonstrated striking differences. In 11 of the 12 patients, the ratio of nodular-to-extranodular radiotracer accumulation was...

Objective: The purpose of this study was to determine if the presence of cyclosporine A (CsA) in whole-blood samples decreased labeling efficiency when an in vitro red blood cell labeling procedure is used. Methods: Red blood cells were labeled by an in vitro method which required sodium pertechnetate, disodium edetate (EDTA), stannous chloride and stopper down centrifugation. Labeling efficien...

UNLABELLED Salivary gland dysfunction is one of the common side effects of high-dose radioiodine therapy for thyroid cancer. The purpose of this study was to determine whether an early start of sucking lemon candy decreases salivary gland injury after radioiodine therapy. METHODS The incidence of the side effects of radioiodine therapy on the salivary glands was prospectively and longitudinal...

OBJECTIVE Symptoms of salivary gland dysfunction frequently develop after radioactive iodine (RAI) therapy, but have generally not been correlated with assessment of salivary gland functioning. The aim of this study was to determine whether there was a correlation between salivary symptoms and salivary functioning as assessed by salivary scan parameters. METHODS This was a non-randomized obse...