scholarly journals Compliant joint echogenicity in ultrasound images: towards highly visible steerable needles

2018 ◽  
Author(s):  
Nick J. van de Berg ◽  
Juan A. Sánchez-Margallo ◽  
Thomas Lango ◽  
John J. van den Dobbelsteen
Keyword(s):  
Ultrasound Images ◽  
Compliant Joint ◽  
Steerable Needles

Automated Characterization of Atheromatous Plaque in Intravascular Ultrasound Images Using Neuro Fuzzy Classifier

2012 ◽  
Vol 58 (4) ◽  
pp. 425-431 ◽  
Author(s):  
D. Selvathi ◽  
N. Emimal ◽  
Henry Selvaraj
Keyword(s):  
Intravascular Ultrasound ◽  
Human Error ◽  
Human Life ◽  
Classification Performance ◽  
Atheromatous Plaque ◽  
Ultrasound Images ◽  
Fuzzy Classifier ◽  
Neuro Fuzzy ◽  
Calcified Tissues

Abstract The medical imaging field has grown significantly in recent years and demands high accuracy since it deals with human life. The idea is to reduce human error as much as possible by assisting physicians and radiologists with some automatic techniques. The use of artificial intelligent techniques has shown great potential in this field. Hence, in this paper the neuro fuzzy classifier is applied for the automated characterization of atheromatous plaque to identify the fibrotic, lipidic and calcified tissues in Intravascular Ultrasound images (IVUS) which is designed using sixteen inputs, corresponds to sixteen pixels of instantaneous scanning matrix, one output that tells whether the pixel under consideration is Fibrotic, Lipidic, Calcified or Normal pixel. The classification performance was evaluated in terms of sensitivity, specificity and accuracy and the results confirmed that the proposed system has potential in detecting the respective plaque with the average accuracy of 98.9%.

A Modular Robotic Catheter Driver for Programmable Bevel-tip Steerable Needles

2018 ◽  
Author(s):  
R Secoli ◽  
◽  
E Matheson ◽  
F Rodriguez y Baena
Keyword(s):  
Steerable Needles

Temporal changes of ultrasound images in acute cholecystitis

Choonpa Igaku ◽  
2016 ◽  
Vol 43 (1) ◽  
pp. 103-113
Author(s):  
Satoshi KAWABATA ◽  
Nobuko TAGAMI ◽  
Norikazu OBANE ◽  
Kyoko TSUMURA ◽  
Nanae SENZAKI ◽  
...  
Keyword(s):  
Acute Cholecystitis ◽  
Temporal Changes ◽  
Ultrasound Images

AN ULTRASOUND SURVEY ON THE PLACENTA AND AMNIOTIC CHARACTERISTICS IN THE SINGLE POSTTERM PREGNANCY

2011 ◽  
pp. 20-24
Author(s):  
Thi My Dung Ha ◽  
Ngoc Thanh Cao ◽  
Thi Song Huong Tran
Keyword(s):  
Amniotic Fluid ◽  
Ultrasound Images ◽  
Ultrasound Scanning ◽  
Amniotic Fluid Index ◽  
Postterm Pregnancy ◽  
Fluid Properties ◽  
Labor Transfer ◽  
The Relationship ◽  
Obstetric Department ◽  
Singleton Pregnancies

Objective: To characterize ultrasound images of placenta and amniotic fluid in cases of singleton pregnancies beyond term predictions, and also explore the relationship between placenta, amniotic fluid and labor transfer status, postpartum child status. Image properties of prenatal placenta and amniotic fluid are immediately examined with ultrasound in 267 cases of postterm pregnancy beyond prediction at Obstetric Department, Hue Central Hospital. Results: In postterm pregnancy, placenta thickness decreases gradually according to gestational age. Oligohydramnios is 30.3%. There is a correlation between amniotic fluid index and birth method with r = 0.41. Sensitivity is 89.15%. Specificity is 48.55%. There is also a correlation between amniotic fluid echogenicity and method of birth: r = 0.478. Sensitivity is 97.67%. Specificity is 42.75%. Amniotic fluid index and baby Clifford's syndrome are also relevant, with r=0.466. Sensitivity is 83.78%. Specificity is 78.26%. Conclusions: Ultrasound scanning of amniotic fluid properties should be noted in the case of postterm pregnancy.

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