NDLI: Investigation of twinkling artifact by controlling oscillating disturbance

Content Provider	IEEE Xplore Digital Library
Author	Naito, Yu. Tanabe, M. Nishimoto, M. Hashimoto, H. Jibiki, T. Shimazaki, T.
Copyright Year	2015
Description	Author affiliation: Grad. Sch. of Sci. & Technol., Kumamoto Univ., Kumamoto, Japan (Naito, Yu.; Tanabe, M.; Nishimoto, M.) \|\| Ultrasound Eng., GE Healthcare Japan Corp., Tokyo, Japan (Hashimoto, H.; Jibiki, T.; Shimazaki, T.)
Abstract	Twinkling artifact (TA) is a phenomenon that rapidly alternating color pixels behind a stationary strongly reflecting medium where a comet tail artifact is expected in Doppler mode. Although this phenomenon has a potential in clinical diagnosis for example early detection of microcalcification in dense breast, the occurrence mechanism has not been clarified yet. There have been several hypotheses for underlying mechanism of this phenomenon: surface roughness of calcification, phase jitter noise of the ultrasound machine, and oscillation of reflecting medium. In this study, in-vitro experiments were conducted, and the effects of the oscillating disturbance on a microcalcification embedded in soft tissue were investigated. A transparent poly (vinyl alcohol) hydro (PVA-H) gel with 7 wt% concentration and graphite power with 7 wt% concentration were used. Glass beads were embedded in the phantom. Each diameter is approximately 569 and 213 μm, respectively. All scanning were performed using a medical ultrasound machine (LOGIQ S8 pilot unit, GE Healthcare) with a linear array probe (ML6-15, GE Healthcare). The probe and the phantom were fixed in several ways for the purpose of determining the factor of the TA. As results, when the probe and the phantom were fixed with a stage and the stage was placed on the same table with the ultrasound machine, the twinkling artifact appeared, and stable Doppler shift components appeared in the peak values of the amplitude of successive I/Q signals. When the stage was isolated from the external disturbance including the US machine, the twinkling artifact and Doppler shift components were suppressed. Suppression of the twinkling artifact by control of oscillating environment demonstrated that the twinkling artifact generates from variability among the acoustic signals, not phase jitter or surface roughness of microcalcification. Furthermore, the variability was caused by acoustical oscillation with the speaker.
Starting Page	1
Ending Page	3
File Size	939873
Page Count	3
File Format	PDF
e-ISBN	9781479981823
DOI	10.1109/ULTSYM.2015.0332
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-10-21
Publisher Place	Taiwan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Phantoms Ultrasonic imaging Probes Glass Doppler effect Indexes Oscillators
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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