Introduction – The estimate of relative renal function (RRF) through scintigraphy with dimercaptosuccinic acid labeled with Technetium-99 metastable (99mTc-DMSA) may be influenced by kidney depth (KD), due to attenuation by soft tissue surrounded kidneys. Considering that rarely this KD is known, several methods for attenuation correction (AC) have been developed, namely those using empirical formulae, such as ...
Introdução – A estimativa da função renal relativa (FRR) através de cintigrafia renal (CR) com ácido dimercaptossuccínico marcado com tecnécio-99 metaestável (99mTc-DMSA) pode ser influenciada pela profundidade renal (PR), atendendo ao efeito de atenuação por parte dos tecidos moles que envolvem os rins. Dado que raramente é conhecida esta mesma PR, diferentes métodos de correção de atenuação (CA) foram desenvo...
In a wide range of medical fields, technological advancements have led to an increase in the average collective dose in national populations worldwide. Periodic estimations of the average collective population dose due to medical exposure is, therefore of utmost importance, and is now mandatory in countries within the European Union (article 12 of EURATOM directive 97/43). Presented in this work is a report on ...
Resumo da comunicação apresentado ao XII Congresso Nacional de Medicina Nuclear, 12-14 Novembro 2009, Mealhada
The Clear-PEM scanner for positron emission mammography under development is described. The detector is based on pixelized LYSO crystals optically coupled to avalanche photodiodes and readout by a fast low-noise electronic system. A dedicated digital trigger (TGR) and data acquisition (DAQ) system is used for on-line selection of coincidence events with high efficiency, large bandwidth and small dead-time. A sp...