Higashi, Y Lens effect artifact in ultrasonography as produced by rectus abdominis muscle. [electronic resource] - Nihon Igaku Hoshasen Gakkai zasshi. Nippon acta radiologica Jun 1986 - 825-38 p. digital Publication Type: Journal Article ISSN: 0048-0428 Subjects--Topical Terms: Abdominal MusclesHumansUltrasonography