Continuous CT thorax, abdomen and pelvis follow-ups arecurrent cornerstone ofresponse assessment to therapy for oncologic patients. Every year number of such examinations rises. Guided by ALARA principles vendors and healthcare professionals always seek for new methods of dose reduction, especially dealing with patients falling under repetitive radiation exposure. Patient tailored protocols, automatic exposure control, tube voltage optimization and new reconstruction technics play the main role in state-of-the-art low dose imaging.
Development of machines with proper processing power enabled IR algorithms which contribute to image quality...
Description of activity and work performed
Predominant part of CT examinations in our institution are abdomen and thorax-abdomen-pelvis multiphasic scans. We have been using Siemens Somatom go.Up CT machine equipped with SAFIRE statistical iterative reconstruction for two years.
In our institution different SAFIRE strengths (levels of iteration) werecompared to filtered back projection (FBP) algorithm scanning patients with conventionalkV (110) andQuality Reference mAs (120) options (Tab.1). Than in 122 patients withnormal weight (body mass index between18.5 and24.9) we gradually reduced tube parameters and selected proper SAFIRE strength to maximally decrease radiation exposure...
Conclusion and recommendations
1. Radiation exposure decline is crucial in high dose multiphase CT studies, especially in the context of multiplefollow up examinations.
2. Noise reduction due to IR allows scanning with lower tube parameters maintaining image diagnostic efficiency and reducing dose up to 30%.
3. Every institution should develop IR-based protocols suitable for their multiple clinicalscenarios.
A. Fedusenko; Odessa/UA - nothing to disclose M. Takha; Odessa/UA - nothing to disclose O. Nikitina; Odessa/UA - nothing to disclose V. Novokhatchenko; Odessa/UA - nothing to disclose
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