Sari, G. and Wahyuni, G. 2017. Efficiency Test Of Colimator Shutter At The X Ray Tube In Radiodiagnostic Laboratory Of Poltekkes Jakarta 2 And Two Clinical Hospitals In Jakarta. SANITAS: Jurnal Teknologi dan Seni Kesehatan. 8, 1 (Jun. 2017), 16-20. DOI:https://doi.org/10.36525/sanitas.2017.3.