TY - JOUR ID - 13925 TI - Comparing IDREAM as an Iterative Reconstruction Algorithm against In Filtered Back Projection in Computed Tomography JO - Iranian Journal of Medical Physics JA - IJMP LA - en SN - AU - Maamoun, Eslam AD - cairo ,egypt Y1 - 2020 PY - 2020 VL - 17 IS - 3 SP - 170 EP - 174 KW - Computed Tomography KW - FBP KW - IDREAM KW - image noise KW - Image Quality KW - Iterative Algorithm SNR DO - 10.22038/ijmp.2019.41872.1613 N2 - Introduction: Recent studies of Computed Tomography (CT) conducted on patient dose reduction have recommended using an iterative reconstruction algorithm and mA (mili-Ampere) dose modulation. The current study aimed to evaluate Iterative Dose Reduction Algorithm (IDREAM) as an iterative reconstruction algorithm. Material and Methods: Two CT protocols (i.e., A: 120 KV /150 mA, FBP; B: 120KV/ (20-150) mAs, IDREAM) to scan water and acrylic phantoms. A number of 40 patients were assigned to two CT protocols (C: n=20, 120KV/160 ±10 mAs, FBP and D: n=20, 120 KV/ (30-150 mAs, IDREAM), the two groups (C and D) were then referred to abdomen and pelvis CT scan (Sinovision, insitum 16) with contrast. Image quality parameters, dose calculations were measured for all groups (i.e., A, B, C, and D). Results: Group B had a highly significant SNR with less significant noise (P<0.05), in comparison with group A. In addition, uniformity was markedly higher for group B (P<0.05) in water phantom and insignificantly different (P>0.05) in acrylic phantom, as compared to group A.  CTDIvol (A: 13.94 mGy ; B: 6.91 mGy , P<0.05  ) and   DLP (A:501.76 mGy.cm ; B :248.88 mGy.cm). Noise and SNR were significantly different (P<0.05) in group D against C. CTDIvol (C: 30.3±5.2 mGy ; D : 15.4 ±2.7 mGy, P<0.05 ) ,   DLP (C:544±100 mGy.cm; D :272.3±50.3 mGy.cm ,P<0.05) and the effective dose (C:8.1±1.5 mSv; D :4.08±0.75 mSv,P<0.05) Conclusion: The results of the present study were indicative of the feasibility of IDREAMas an iterative reconstruction algorithm. UR - https://ijmp.mums.ac.ir/article_13925.html L1 - https://ijmp.mums.ac.ir/article_13925_cc10cc0edbb680540b14462da7acf61f.pdf ER -