PARKER AQUASONIC 100 ULTRASOUND GEL (01-50). The World Standard for Medical Ultrasound Transmission, AQUASONIC 100 is the most widely used gel for diagnostic and therapeutic medical ultrasound. Recommended for all procedures where a viscous gel is required. 5-LITER SONICPAC™ with refillable dispenser. 1/BX 4BX/CS. Price per box.