Abstract
The purpose of the study is to find out the changes of the signal-to-noise ratio (SNR) of magnetic resonance imaging (MRI) when performing MRI, computed tomography (CT), and isotope examination using 99mTc. For the study, divide the phantoms into two groups: (1) saline, saline + different kinds of contrast agent without 99mTc administration; (2) 99mTc administration: saline, saline + different kinds of the contrast agent with 99mTc administration. The CT contrast agent was used for Iopamidol® and Dotarem. And MRI contrast agent was used for Primovist® and Gadovist®. To obtain image, we used 3.0 T MR System, and obtained T1 and T2 images. Using obtained image, we compared an average value of SNR of T1 and T2 before and after distributing 99mTc. As a result, SNR in T1 images had a significant difference before and after putting 99mTc to every contrast media except normal saline. Also SNR in T2 mages had a significant difference before and after putting 99mTc in every contrast media except Gadovist®.
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