Evaluación "a distancia" de calidad de imagen en Tomografía Computada: validación de una herramienta.

Computer tomography image quality control assessment take part of Cuban national legislation, which could be difficult to accomplish for many reasons. This work is part of the set-up verifications of "in house tool" (EvaCT) designed to calculate parameters of quality control of CT images (CCCT) in various manufacturer's phantoms, "at distance". For this, the behavior of the established parameters was studied in 17 studies of the stablished CCCT routine with the Mediso PET/SPECT/CT Anyscan Trio equipment, comparing the results using manufacture´s reference values, and/ or the international recommended parameter´s tolerances. The results of the system were compared numerically with those obtained by the manufacturer, for each available related parameter, in the corresponding protocol, and did not show significant differences (p≥0.05). In general, the system showed a satisfactory behavior, taking as reference the values and tolerances of the manufacturer, CECMED and IAEA. The correlation between quality descriptors established with different methodologies was analyzed. The tool showed correspondence with the manufacturer's results, making available a greater number of parameters and more operational conditions to be evaluated. The mean values ±SD characterize these parameters in the equipment and its phantom, and can be used for periodic, independent and remote CCCT verification. [ABSTRACT FROM AUTHOR]