eng Science and Education Publishing American Journal of Pharmacological Sciences 2327-672X 2024-04-08 12 1 8 16 10.12691/ajps-12-1-2 AJPS20241212 article Francis Akiana akianaf1876@gmail.com 1 Olivia Firmine Galiba Atipo Tsiba 2 Joel Bazoma 3 Abraham Mayoke 3 R¨¦gis Moyikoua 4 Guy Apollinaire Mensah 5 Daton Medenou 5 University of Abomey Calavi, Doctoral School of Engineering Sciences, Department of Radiobiology, BP2009. Cotonou, Benin Marien Ngouabi University, Faculty of Health Sciences, PO BOX 69. Brazzaville Congo Marien Ngouabi University, Faculty of Science and Techniques, PO BOX 69. Brazzaville, Congo Hospital center universal of Brazzaville and Imagery medical service Laboratoire de Zootechnie et Faune, Facult¨¦ des Sciences, Arts et Lettres du B¨¦nin, Universit¨¦ d'Abomey-Calavi, 01 B.P. 2359 Recette Principale, Cotonou Ionizing irradiations doses were delivered to paediatric and adults patients during CT scans examinations are caused various effects on tissues organs exposed. This can be induced various risks consequences including cancers if overdosed. Administered doses are regulated compared to international standards worldwide. The aim of this study was to evaluate dose delivered to patients during CT scans in four hospitals in the republic Congo. A total of 350 adult and 76 paediatric patients were surveyed especially cerebral chest, Pelvis-abdominal and thoracic abdomino-pelvis. We were obtained adult DPL mean values in adults ranging from 1896.04 ± 57.08 mGy.cm to 3018.45 ± 1917.13 mGy.cm with contrast product. Whereas, without a contrast product, value is varied from 1244.01 ± 694.18 mGy.cm when the highest in the skull is 1943.86 ± 72.05 mGy.cm. We were accessed high effective doses compared to ICPR 60 (4.08 ± 1.62 - 42.88 ± 25.53) and ICPR 103 (03.69 ± 1.47 - 40.02 ± 23.83). Paediatric patients were received doses ranging between 193.00 to 347.55mG.cm in the skull in hospital A. In the age-group of < 1- 15 years, all centers were received from 6.46 to 19.84 mGy.cm. The highest is meant for adults in the cerebral were 133.35 mSv whereas others organs were received between 39.58 to 73.81 mSv with contrast. The paediatric patients are reached 347.55 mSv in the cerebral with contrast product and other organs were received up to 19.84 mSv. Our studies were revealed that doses were delivered to patients during CT scans in the republic of the Congo are all higher than the standard. This is due to be unregulated, administered to patients, the vestuosity of the equipment used, and the lack of technical training for technician¡¯s radiologists¡¯ on dose reduction. These results were raised an alarm to establish a dose level reduction and national regulatory body to be convened international standards on doses reduction countrywide. https://pubs.sciepub.com/ajps/12/1/2/ajps-12-1-2.pdf ionizing radiation tomodensimetry parameters patient no reglementary