Рентгенология & Радиология, 2012, LI 36-39

Is there any advantage from the Hybrid ImagingDiagnistics?
I. Kostadinova
Abstract.

The hybrid imaging methods- Single photon Emission Tomography-Computer Tomography / SPECT-CT/ and Positron Emission Tomography-Computer Tomography / PET-CT/ allow receiving of combined image of two different techniques. In such a way it is possible to superimpose detailed anatomical image of the multislice spiral computer tomography with specific and sensitive molecular images of the SPECT and PET in a single study, allowing utilization
of the full possibilities of the both techniques. They have advantages and disadvantages, which basically stem from the differences in the used radiopharmaceutiacls and their physical properties. In PET-CT – positron emitters are applied,most often 18F and 11C, while-in SPECT-CT – single photon emitters, most often 99mTc and 131I. A disadvantage ofPET is a high cost, which is produced in cyclotron and its logistics is complicated. The great advantage of PET is itsbetter spatial resolution, compared to SPECT, because of the possibility to for simultaneous detection of pared photons and better registration. These techniques, especially PETCT are nowadays the most increasing imaging methods in the world in making diagnosis, staging and following the effect of treatment in patients with oncological, neurological, cardiological, orthopedical diseases and infections. Recently, they are applied for the purposes of radiotherapy planning on the basis of the metabolically active tumour. As a final result, compared to the conventional tecniques- rentgenography, computertomography and magneticresonance imaging, it ispossible in many cases to make an early and more precise diagnosis and to safe time for the patient for adequate treatment. As a conclusion it is clear, that the hybrid imaging has future and its application will increase in future.

K ey words: HYBRID IMAGING. SPECT/CT. PET/CT