Semi-automatic Algorithms for Estimation and Tracking of AP-diameter of the IVC in Ultrasound Images

Medical research has suggested that the anterior-posterior (AP)-diameter of the inferior vena cava (IVC) and its associated temporal variation as imaged by bedside ultrasound is useful in guiding fluid resuscitation of the critically-ill patients. This paper develops semi-automatic active ellipse and rectangle algorithms for measurement and tracking of the AP-diameter. The proposed algorithms are compared with an expert manual measurement and the previous work based on active circle model. It is shown that regardless of the shape of the IVC, the rectangle model always outperforms the two other models and performs very close to manual measurement.

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Semi-Automatic Algorithms for Estimation and Tracking of AP-Diameter of the IVC in Ultrasound Images

Journal of Imaging ◽

10.3390/jimaging5010012 ◽

2019 ◽

Vol 5 (1) ◽

pp. 12

Author(s):

Ebrahim Karami ◽

Mohamed S. Shehata ◽

Andrew Smith

Keyword(s):

Heart Failure ◽

Inferior Vena ◽

Vena Cava ◽

Expert Assessment ◽

Ultrasound Images ◽

Circulating Blood Volume ◽

Portable Ultrasound ◽

Manual Measurement ◽

Circle Model ◽

Anterior Posterior

Acutely ill patients presenting with conditions such as sepsis, trauma, and congestive heart failure require judicious resuscitation in order to achieve and maintain optimal circulating blood volume. Increasingly, emergency and critical care physicians are using portable ultrasound to approximate the temporal changes of the anterior–posterior (AP)-diameter of the inferior vena cava (IVC) in order to guide fluid administration or removal. This paper proposes semi-automatic active ellipse and rectangle algorithms capable of improved and quantified measurement of the AP-diameter. The proposed algorithms are compared to manual measurement and a previously published active circle model. Results demonstrate that the rectangle model outperforms both active circle and ellipse irrespective of IVC shape and closely approximates tedious expert assessment.

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Predicting and measuring fluid responsiveness with echocardiography

Echo Research and Practice ◽

10.1530/erp-16-0008 ◽

2016 ◽

Vol 3 (2) ◽

pp. G1-G12 ◽

Cited By ~ 32

Author(s):

Ashley Miller ◽

Justin Mandeville

Keyword(s):

Left Ventricle ◽

Inferior Vena Cava ◽

Right Ventricle ◽

Fluid Responsiveness ◽

Fluid Resuscitation ◽

Critically Ill Patients ◽

Inferior Vena ◽

Vena Cava ◽

Clinical Judgement ◽

Dynamic Variables

Echocardiography is ideally suited to guide fluid resuscitation in critically ill patients. It can be used to assess fluid responsiveness by looking at the left ventricle, aortic outflow, inferior vena cava and right ventricle. Static measurements and dynamic variables based on heart–lung interactions all combine to predict and measure fluid responsiveness and assess response to intravenous fluid resuscitation. Thorough knowledge of these variables, the physiology behind them and the pitfalls in their use allows the echocardiographer to confidently assess these patients and in combination with clinical judgement manage them appropriately.

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