title: [Studies on echo level of ultrasonic diagnostic equipment; physical characteristic on echo level].
authors: Department of Oral Radiology, Showa University.
authors: C
authors: C
authors: Maki
authors: T
authors: T
authors: Okano
authors: Y
authors: Y
authors: Shibasaki
authors: T
authors: T
authors: Fukuhara
mesh_terms: D003748:Dental Equipment; D014463:Ultrasonography / Q000295:instrumentation*