• I.E. Saad (Evaluation of the Image Contrast with a New Depth-Dependent Collimator Resolution Iterative Reconstruction Method) Egyptian J. Nucl. Med.2010, Vol. 2, No. 1. • Fahima M. Hashem, Dalia S. Shaker, Mohamed Nasr, Ibrahim E. Saad, ReemRagaey (Guar gum and hydroxyl propyl methylcellulose compressed coated tablets for colonic drug delivery: in vitro and in vivo evaluation in healthy human volunteers) Drug Discoveries & Therapeutics. Japan – 2011; 5(2):90-95. • Mohamed Nasr, Ibrahim E. Saad (Formulation and evaluation of mastic gum as a compression coat for colonic delivery of 5-flurouracil) International Journal of Drug Delivery. 2011; (3) 481- 491 Saad I., Mattar E., Ashour A. (Contrast Evaluation for a Dual Head SPECT System with Different Energy Peaking-Drift) Egyptian J. Nucl. Med.2011, Vol. 4, No. 1. • Ibrahim E. Saad, Nadia L. Helal, HazemMohie El-Din, RizkA.Moneam (Evaluation Of Varying Acquisition Parameters On The Image Contrast In Spect Studies) International Journal of Research and reviews in applied Sciences.2012 Vol. (13) Issue (2( .Abdelhafez YG, Moustafa HM, Khalil HF, Saad IE, Liao CT, Yen TC (Optimum contouring method fornmetabolic tumor volume using PET/CT in patients with oral cavity squamous cell carcinoma) Egyptian Journal of Nuclear Medicine on Vol. 5, No. 1 June. 2012. • Ibrahim E. Saad (Performance Comparison between Three PET-CT Machines) The Egyptian Journal of Biophysics and Biomedical Engineering on 22-11-2012. • Ibrahim E. Saad (Analysis of the geometrical and physical fluctuations while performing intrinsic uniformity test for Philips Forte gamma camera) International Journal of Research and reviews in applied sciences, Vol.15, issue3, 2013. • T. Alsennawy, Wael Alonazy and I.E. Saad (Robotic Radioactive Doses Delivery System in Nuclear Medicine Facility) IOSR Journal of Applied Physics Volume 9, Issue 6 Ver. I (Nov. – Dec. 2017), PP 34-40. • Ibrahim E. Saad , Hossam M. Yassin (Finger Radiation Doses Received By Different Nuclear Medicine Working Professions in Three PET/ CT Centers) Egyptian J. Nucl. Med., Vol. 17, No. 2, December 2018. • Ibrahim E. Saad (Forensic Nuclear Medicine) Egyptian J. Nucl. Med., Vol. 17, No. 2, December 2018. • Ibrahim E. Saad, Abd E. Zamzam, and Ahmed A.Hasana (Assessment of the patient satisfaction for nuclear medicine services in Riyadh region) World J Nucl. Med. 2019 Jan-Mar; 18(1): 25-29. • Hazem m Tantawy, Yasser G Abdelhafez, Nadia Helal , Amr I Kany and Ibrahim E. Saad ( Effect of correction methods on image resolution of myocardial perfusion imaging using single photon emmison tomography combined with computed tomography hybrid systems) Journal of Physics communications Vol.4, No.1 17 January 2020. • Hazem m Tantawy, Yasser G Abdelhafez, Nadia Helal , and Ibrahim E. Saad ( Variation of contrast values for myocardial perfusion imaging in single- photon emmsion computed tomography hybrid systems with different correction methods) Journal of clinical imaging science, 2020;10:58. • Saad I E, Alawm K, Dogham R, Mohieeldin H, Mohsen D M, Preparedness for prevention and Mitigation guidelines of COVID -19 at Academic Medical institute. IP Int J Med Microbiol Trop Dis 2020;6(3):143-149 • Saad, I E, Mosaad, M, Qasem, H, Tantawy, H and Ibrahim, H, Personal Radiation Doses Monitoring For Nuclear Medicine Technology Students. Egyptian Journal Nuclear Medicine, 2021; 23(2): 91-100. doi: 10.21608/egyjnm.2021.217704 • Hiba Omer, H. Salah, N. Tamam, Omer Mahgoub, A. Sulieman, Rufida Ahmed, M. Abuzaid, Ibrahim E. Saad, Kholoud S. Almogren, D.A. Bradley, Assessment of occupational exposure from PET and PET/CT scanning in Saudi Arabia, Radiation Physics and Chemistry, Volume 204, 2023,110642, ISSN 0969-806X. doi.org/10.1016/j.radphyschem.2022.110642. • Nasr, H., Alsomali, H., Saad, I. et al. Association between glycated hemoglobin (HbA1c) level and cardiac perfusion and function on gated myocardial perfusion SPECT. Egypt J Radiol Nucl Med 54, 85 (2023). https://doi.org/10.1186/s43055-023-01036-7