Ying Wang, Fakhra Yasmin, Ahsan Akbar
Impact of the internet on English language learning among university students: mediating role of academic self-efficacy
Frontiers in psychology
xray computed tomography dose levels varying among modalities scanning body regions due absence incessant routine followup thus study aimed compute dose index discrepancies ethiopia recurring scan protocols head chest abdomen pelvis purposive sampling method employed select hospitals due rare existence functional ct scanners ethiopia selected hospitals total 1385 249 heads 804 chests 132 abdomens 200 pelvis collected terms standard dose metric values period december 2019march 2020 patients dlp computed mean value using ibm spss statistics 20 software mean dlp compute effective dose patients dose level disparity observed study though icrp standard level body regions except pelvis dlp 59337 mgycm black lion dose level head chest computed within recommended level hospitals effective doses pelvis four hospitals teklehaimanot black lion alert pauls ayder hospitals computed 645 890 508 654 684 msv respectively effective doses abdomen ayder hospital obtained 890 msv recommended value xray ct scanners somewhat properly functioning although sort justification optimization pelvis abdomen examinations strongly recommended implement low reasonably achievable principle