title: Central dot sign.
authors.affiliation: Medical Imaging Department, College of Medicine, Al-Qassim University, Buraydah, Kingdom of Saudi Arabia.
authors.forename: Alghofaily Ali
authors.initials: AA
authors.lastname: Khalefa
authors.affiliation: Department of Radiology, King Faisal Specialist Hospital and Research Center, MBC-28, P.O Box 3354, Riyadh, 11211, Kingdom of Saudi Arabia.
authors.forename: Mohannad
authors.initials: M
authors.lastname: Alrasheed
authors.affiliation: Department of Radiology, King Faisal Specialist Hospital and Research Center, MBC-28, P.O Box 3354, Riyadh, 11211, Kingdom of Saudi Arabia. Mbinsaeedan@gmail.com.
authors.forename: Mnahi Bin
authors.identifier: http://orcid.org/0000-0002-6231-7914
authors.initials: MB
authors.lastname: Saeedan