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2007, Number 2

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Anales de Radiología México 2007; 6 (2)

Valor estandarizado de captación máximo, determinado con Tomografía por Emisión de Positrones y Tomografía Computarizada. “Primera experiencia en México”

Altamirano LJ, Acosta BG, Ochoa CFJ, Vásquez ER, Hernández RS, Estrada G

Language: Spanish
References: 20
Page: 113-119
PDF size: 93.47 Kb.


ABSTRACT

Introduction: The positrons emission tomography and computerized tomography, is the most modern innovation in the Nuclear Medicine and of Radiology that is able to provide in vivo biological processes imaging, prior administration of marked radio particles with positrons emission, besides being useful as an anatomical and diagnostic framework when contrast means are used. This has been primarily of great help within the oncology field, since it offers anatomical and functional information at the cellular level.
Objective: To determine the maximum standardized intake value of fluorodesoxiglucose (18FDG), in Mexican patients, in the different organs of normal concentration and to compare our cut level with that of the literature.
Material and methods: 136 oncological patients with an age range from 4 to 88 years were included, with a 50.6 year-old mean, from both genders, prevailing those of the masculine sex with a frequency of 51% and of 49% for the feminine sex that were referred to the service of PET-CT to be re-staged and whose result was negative for current illness. 18F-FDG was used administered through intravenous via, determining the dose based on the patient’s weight. All patients prior to the study had a fast of 6-8 hours. Once tracer was injected, the patient remained in silence and dimness during 60 minutes prior to the study, during which they took plenty of simple water and stayed in rest. To all the patients the study of thighs proximal third to the base of the skull was carried out. Once the study was processed, the standardized intake value was determined in each part of the organism that concentrated the 18FDG physiologically. Studies were obtained with a PET-CT equipment, which allows the acquisition of the metabolic and anatomical studies at the same time.
Results: Overall mean intake, for the different corporal structures was of: brownish fat 2.2, Waldeyer ring 1.9, lung 0.4, mediastinum 1.7, liver 1.8, spleen 1.8, kidneys 2.5, muscle 0.6, stomach 1.6, colon 1.8 and bone 0.4.
Conclusions: Minimum intake variations were observed from one patient to another, without exceeding normal ranges already stipulated by international standardizations. Neither statistically significant differences exist in the semi-quantification of SUVmax. So that our research agrees with that established in the literature.


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