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1. AU1998089902 - Improvements in or relating to contrast agents

Office
Australia
Application Number 89902/98
Application Date 19.08.1998
Publication Number 1998089902
Publication Date 06.05.1999
Publication Kind A
IPC
A61K 49/00
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
49Preparations for testing in vivo
A61K 49/22
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
49Preparations for testing in vivo
22Echographic preparations; Ultrasound imaging preparations
CPC
A61K 49/223
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
49Preparations for testing in vivo
22Echographic preparations; Ultrasound imaging preparation ; Optoacoustic imaging preparations
222characterised by a special physical form, e.g. emulsions, liposomes
223Microbubbles, hollow microspheres, free gas bubbles, gas microspheres
Applicants Nycomed Imaging AS
Inventors Eriksen, Morten
Frigstad, Sigmund
Tornes, Audun
Priority Data 9717588 19.08.1997 GB
Title
(EN) Improvements in or relating to contrast agents
Abstract
(EN) Ultrasound imaging using gas microbubble-containing contrast agents may be performed in the recirculating phase following admixture of the contrast agent with the blood pool, thereby prolonging the useful imaging time window compared to that conventionally obtained during the backscatter signal peak resulting from first pass of a contrast agent bolus. The length of the time window may further be increased by imaging at ultrasound frequencies of 2 MHz or less, particularly by harmonic imaging at transmit frequencies less than the resonance frequencies of the gas microbubbles.
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