Differentiation Image Quality of MRI Shoulder Joint with Variation RF Coils Sri Mulyati, Luthfi Rusyadi, Ika Mentari Putri Rahmawati, Fatimah, Ardi Soesilo Wibowo, Rini Indrati and Rasyid E3S Web Conf., 125 (2019) 18001 Published online: 28 October 2019 DOI: 10.1051/e3sconf/201912518001