Towards a thoracic conductive phantom for EIT

Gelidi, Serena de; Seifnaraghi, Nima; Bardill, Andy; Wu, Yu; Frerichs, Inéz; Demosthenous, Andreas; Tizzard, Andrew; Bayford, Richard

doi:10.1016/j.medengphy.2019.10.008

Cited by 5 publications

(2 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several examples already exist of EIT phantoms made using 3D printed components. Zhang et al 17 proposed a skull phantom for EIT partly made from 3D printed conductive material, and de Gelidi et al 18 proposed a phantom of the neonatal torso made up of several parts that could be removed to produce a change in internal resistivity. 3D printed parts have good spatial resolution with respect to their manufacturing.…”

Section: Introductionmentioning

confidence: 99%

A novel two-dimensional phantom for electrical impedance tomography using 3D printing

Creegan,

Nielsen,

Tawhai

2024

Sci Rep

View full text Add to dashboard Cite

Electrical impedance tomography (EIT) is an imaging method that can be used to image electrical impedance contrasts within various tissues of the body. To support development of EIT measurement systems, a phantom is required that represents the electrical characteristics of the imaging domain. No existing type of EIT phantom combines good performance in all three characteristics of resistivity resolution, spatial resolution, and stability. Here, a novel EIT phantom concept is proposed that uses 3D printed conductive material. Resistivity is controlled using the 3D printing infill percentage parameter, allowing arbitrary resistivity contrasts within the domain to be manufactured automatically. The concept of controlling resistivity through infill percentage is validated, and the manufacturing accuracy is quantified. A method for making electrical connections to the 3D printed material is developed. Finally, a prototype phantom is printed, and a sample EIT analysis is performed. The resulting phantom, printed with an Ultimaker S3, has high reported spatial resolution of 6.9 µm, 6.9 µm, and 2.5 µm for X, Y, and Z axis directions, respectively (X and Y being the horizontal axes, and Z the vertical). The number of resistivity levels that are manufacturable by varying infill percentage is 15 (calculated by dividing the available range of resistivities by two times the standard deviation of the manufacturing accuracy). This phantom construction technique will allow assessment of the performance of EIT devices under realistic physiological scenarios.

show abstract

Section: Introductionmentioning

confidence: 99%

A novel two-dimensional phantom for electrical impedance tomography using 3D printing

Creegan,

Nielsen,

Tawhai

2024

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Few phantoms for electrical impedance have been reported. They reproduce head [ 32 , 33 ] breast [ 34 , 35 , 36 ] or thorax [ 37 ].…”

Section: Introductionmentioning

confidence: 99%

Proposal of a Lab Bench for the Unobtrusive Monitoring of the Bladder Fullness with Bioimpedance Measurements

Gaubert

Gidik

Končar

2020

Sensors

View full text Add to dashboard Cite

(1) Background: millions of people, from children to the elderly, suffer from bladder dysfunctions all over the world. Monitoring bladder fullness with appropriate miniaturized textile devices can improve, significantly, their daily life quality, or even cure them. Amongst the existing bladder sensing technologies, bioimpedance spectroscopy seems to be the most appropriate one to be integrated into textiles. (2) Methods: to assess the feasibility of monitoring the bladder fullness with textile-based bioimpedance spectroscopy; an innovative lab-bench has been designed and fabricated. As a step towards obtaining a more realistic pelvic phantom, ex vivo pig’s bladder and skin were used. The electrical properties of the fabricated pelvic phantom have been compared to those of two individuals with tetrapolar impedance measurements. The measurements’ reproducibility on the lab bench has been evaluated and discussed. Moreover, its suitability for the continuous monitoring of the bladder filling has been investigated. (3) Results: although the pelvic phantom failed in reproducing the frequency-dependent electrical properties of human tissues, it was found to be suitable at 5 kHz to record bladder volume change. The resistance variations recorded are proportional to the conductivity of the liquid filling the bladder. A 350 mL filling with artificial urine corresponds to a decrease in resistance of 7.2%, which was found to be in the same range as in humans. (4) Conclusions: based on that resistance variation; the instantaneous bladder fullness can be extrapolated. The presented lab-bench will be used to evaluate the ability of textiles electrodes to unobtrusively monitor the bladder volume.

show abstract

A Three-dimensional Phantom for Evaluating the Performance of Electrical Impedance Tomography System

Zhang

et al. 2022

2022 IEEE MTT-S International Microwave Biomedical Conference (IMBioC)

View full text Add to dashboard Cite

Towards a thoracic conductive phantom for EIT

Cited by 5 publications

References 27 publications

A novel two-dimensional phantom for electrical impedance tomography using 3D printing

A novel two-dimensional phantom for electrical impedance tomography using 3D printing

Proposal of a Lab Bench for the Unobtrusive Monitoring of the Bladder Fullness with Bioimpedance Measurements

A Three-dimensional Phantom for Evaluating the Performance of Electrical Impedance Tomography System

Contact Info

Product

Resources

About