Journal of Electrical Bioimpedance最新文献_第2页

Prototype analysis of a low-power, small-scale wearable medical device. 低功耗、小型可穿戴医疗设备的原型分析。

Journal of Electrical Bioimpedance Pub Date : 2025-01-04 eCollection Date: 2024-01-01 DOI: 10.2478/joeb-2024-0020

Pablo Dutra da Silva, Pedro Bertemes Filho

{"title":"Prototype analysis of a low-power, small-scale wearable medical device.","authors":"Pablo Dutra da Silva, Pedro Bertemes Filho","doi":"10.2478/joeb-2024-0020","DOIUrl":"10.2478/joeb-2024-0020","url":null,"abstract":"Wearable and portable devices are gaining significant popularity across consumer electronics as well as in medical and industrial fields. To ensure that these devices are both comfortable and appealing to users, they need to have low battery consumption and be compact in both size and weight. The EGluco project is focused on developing a wearable device for non-invasive blood glucose monitoring. This multi-sensor device incorporates electrical bioimpedance spectroscopy as one of its measurement techniques. One of the earlier versions of the device was deemed unsuitable as a wearable due to its large size and high power consumption. To make the device more suitable for wearability, the previous hardware was assessed, and a new design was proposed that simplified the system's power supply and reduced the operating voltage. This article presents two of these designs: an improved Howland current source with a supply voltage of 3.3 V, an output current of 250 μA, and the ability to conduct bioimpedance analysis up to 1 MHz using pulsed DIBS (Discrete Interval Binary Sequence) signals, and an instrumentation amplifier with the same supply voltage as the current source, a voltage gain of four, and a slew rate of 150 V/μs. By simplifying the power supply and implementing other changes, the device's size was reduced to a single 5 × 5 cm circuit board, compared to the previous configuration of four separate boards connected by cables.","PeriodicalId":38125,"journal":{"name":"Journal of Electrical Bioimpedance","volume":"15 1","pages":"169-176"},"PeriodicalIF":0.0,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11699846/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142932958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Differential phase angle spectrum for liquid detection in functionalized surface roughness polymeric electrode. 功能化表面粗糙度聚合物电极液体检测的微分相角谱。

Journal of Electrical Bioimpedance Pub Date : 2024-12-23 eCollection Date: 2024-01-01 DOI: 10.2478/joeb-1024-0019

John Alexander Gomez-Sanchez, Luciano de Souza Ribero Bueno

{"title":"Differential phase angle spectrum for liquid detection in functionalized surface roughness polymeric electrode.","authors":"John Alexander Gomez-Sanchez, Luciano de Souza Ribero Bueno","doi":"10.2478/joeb-1024-0019","DOIUrl":"10.2478/joeb-1024-0019","url":null,"abstract":"The conductive polymeric electrodes using 3D printing are an innovative material development with the advantage of the flexibility of integrating isolated polymers with a higher electrical conductivity of carbon-based materials, generating new possibilities in environmental, healthcare, and food monitoring. Based on the morphology, geometric arrangement, and dielectric properties of the composites, the performance of the electrodes is improved. Structural designs are optimized to enhance functionalities such as adhesion, catalytic activity, and the reduction of interface energy. With these concepts, a functionalized carbon-based polymeric electrode was fabricated using 3D printing. The Differential Impedance Spectrum (DIS) was employed to analyze the response of functionalized electrodes to solutions of acetic acid and calcium chloride (CaCl2 ). DIS data extract the differential phase angle and indicate the interactions between the functionalized surface with acetic acid and CaCl2 solutions, showing noticeable peaks in three zones: at lower frequencies (< 10 kHz), medium frequencies range of 10 kHz to 100 kHz, and higher frequencies (> 100 kHz). In the three cases analyzed, the CaCl2 solution presented the highest frequency compared with acetic acid. When the sensor was doubled functionalized, the peaks were shifted between the range of 220 kHz to 280 kHz. A conclusion is that the carbon-based polymer electrode not only reduces manufacturing costs but also enables faster functionalization to detect specific chemical compounds in liquids quickly and portable without the need for higher-level equipment. These electrodes could be applied to make measurements in aqueous media such as ponds, pools, lakes, rivers, and oceans to detect contaminants, as well as in human fluids to recognize metabolites in sweat, urine, saliva, and blood.","PeriodicalId":38125,"journal":{"name":"Journal of Electrical Bioimpedance","volume":"15 1","pages":"162-168"},"PeriodicalIF":0.0,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11665877/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142882373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Methodology for integrated analysis of vector- and spectroscopic bioimpedance methods. 矢量和光谱生物阻抗方法的综合分析方法。

Journal of Electrical Bioimpedance Pub Date : 2024-12-17 eCollection Date: 2024-01-01 DOI: 10.2478/joeb-2024-0018

José Luis García Bello, Alcibiades Lara Lafargue, Héctor Camué Ciria, Taira Batista Luna, Yohandys Zulueta Leyva

{"title":"Methodology for integrated analysis of vector- and spectroscopic bioimpedance methods.","authors":"José Luis García Bello, Alcibiades Lara Lafargue, Héctor Camué Ciria, Taira Batista Luna, Yohandys Zulueta Leyva","doi":"10.2478/joeb-2024-0018","DOIUrl":"10.2478/joeb-2024-0018","url":null,"abstract":"Electrical bioimpedance is based on the opposition exerted by body tissues to the passage of an electrical current. This characteristic allows the assessment of the individual's body composition, nutritional status, and hydration status. Electrical bioimpedance can be used to estimate body composition, health-related markers, general health status, diagnosis and prognostic of diseases, evaluation of treatment progress, and others. The aim of this study is to propose a methodology that allows us to integrate two methods of electrical bioimpedance analysis: bioelectrical impedance vector analysis, and bioelectrical impedance spectroscopy to evaluate the health of individuals. For methodology validation a retrospective clinical investigation was carried out where the data of healthy individuals and cancer patients included in the Database of the characterization of bioelectrical parameters by electrical Bioimpedance methods were analyzed. The values of electrical resistance and electrical reactance are higher in cancer patients compared to healthy individuals. However, the phase angle is lower in these patients. In the advanced stages of the disease, patients are located outside the tolerance ellipses. All these results are obtained at the characteristic frequency. The integration of bioelectrical impedance vector analysis, and bioelectrical impedance spectroscopy can be a sensitive complementary tool, capable of establishing differences between healthy individuals and cancer patients. Enrichment could be achieved by including the analysis of different physiological parameters through estimation equations validated by BIS parameters.","PeriodicalId":38125,"journal":{"name":"Journal of Electrical Bioimpedance","volume":"15 1","pages":"154-161"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11665879/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142882678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bioimpedance assessment of body composition in the first adulthood period of somatic types residing in highland. 对居住在高原地区的体质类型人群成年初期的身体成分进行生物阻抗评估。

Journal of Electrical Bioimpedance Pub Date : 2024-10-05 eCollection Date: 2024-01-01 DOI: 10.2478/joeb-2024-0014

Kadyr Kozuev, Toktogazy Tulekeev, Sagynbek Dzholdubaev, Zarina Toichieva, Zhypargul Abdullaeva

{"title":"Bioimpedance assessment of body composition in the first adulthood period of somatic types residing in highland.","authors":"Kadyr Kozuev, Toktogazy Tulekeev, Sagynbek Dzholdubaev, Zarina Toichieva, Zhypargul Abdullaeva","doi":"10.2478/joeb-2024-0014","DOIUrl":"10.2478/joeb-2024-0014","url":null,"abstract":"The current stage of development of medical science is characterized by growing interest in constitutional typology and clinical anthropology. The anatomical-anthropological approach is an integrative technique of biology and medicine that allows us to determine the criteria for normality and pathology of a person. Purpose of the study: comparative bioimpedance assessment of somatic types of body component composition among the first mature age period people residing in highland. Study design: a comparative bioimpedance assessment of body types according to the Heath and Carter's scheme was performed to identify somatic types and body weight composition in healthy men of the 1st adulthood period living in high mountains (2469-3325 m above sea level). Somatotypical features of body composition have been established. An intertype and correlation analysis of body composition was conducted in individuals with different body types. Results: comparative bioimpedance and correlation analyses revealed differences in body composition indicators depending on population, age, body types and living conditions. Conclusion: mesoectomorphy, balanced ectomorphic, central and meso-endo types prevailed among the somatotype subgroups.","PeriodicalId":38125,"journal":{"name":"Journal of Electrical Bioimpedance","volume":"15 1","pages":"125-129"},"PeriodicalIF":0.0,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11452782/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142381889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Switched CMOS current source compared to enhanced Howland circuit for bio-impedance applications. 用于生物阻抗应用的开关式 CMOS 电流源与增强型 Howland 电路的比较。

Journal of Electrical Bioimpedance Pub Date : 2024-10-05 eCollection Date: 2024-01-01 DOI: 10.2478/joeb-2024-0017

Pablo Dutra da Silva, Pedro Bertemes Filho

{"title":"Switched CMOS current source compared to enhanced Howland circuit for bio-impedance applications.","authors":"Pablo Dutra da Silva, Pedro Bertemes Filho","doi":"10.2478/joeb-2024-0017","DOIUrl":"10.2478/joeb-2024-0017","url":null,"abstract":"Bio-impedance Spectroscopy (BIS) is a technique that allows tissue analysis to diagnose a variety of diseases, such as medical imaging, cancer diagnosis, muscle fatigue detection, glucose measurement, and others under research. The development of CMOS integrated circuit front-ends for bioimpedance analysis is required by the increasing use of wearable devices in the healthcare field, as they offer key features for battery-powered wearable devices. These features include high miniaturization, low power consumption, and low voltage power supply. A key circuit in BIS systems is the current source, and one of the most common topology is the Enhanced Howland Current Source (EHCS). EHCS is also used when the current driver is driven by a pseudo-random signal like discrete interval binary sequences (DIBS), which, due to its broadband nature, requires high performance operational amplifiers. These facts lead to the need for a current source more compatible with DIBS signals, ultra-low power supply, standard CMOS integrated circuit, output current amplitude independent of input voltage amplitude, high output impedance, high load capability, high output voltage swing, and the possibility of tetra-polar BIS analysis, that is a pseudotetra-polar in the case of EHCS. The objective of this work is to evaluate the performance of the Switching CMOS Current Source (SCMOSCS) over EHCS using a Cole-skin model as a load using SPICE simulations (DC and AC sweeps and transient analysis). The SCMOSCS demonstrated an output impedance of more than 20 MΩ, a ± 2.5 V output voltage swing from a +3.3 V supply, a 275 μA current consumption, and a 10 kΩ load capacity. These results contrast with the + 1.5 V output voltage swing, the 3 kΩ load capacity, and the 4.9 mA current of the EHCS case.","PeriodicalId":38125,"journal":{"name":"Journal of Electrical Bioimpedance","volume":"15 1","pages":"145-153"},"PeriodicalIF":0.0,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11452781/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142381891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Time-variant left ventricle models for intracardiac impedance analysis. 用于心内阻抗分析的时变左心室模型

Journal of Electrical Bioimpedance Pub Date : 2024-10-05 eCollection Date: 2024-01-01 DOI: 10.2478/joeb-2024-0015

Daniel Voss, Clara Wemmer, Steffen Leonhardt, Marian Walter

{"title":"Time-variant left ventricle models for intracardiac impedance analysis.","authors":"Daniel Voss, Clara Wemmer, Steffen Leonhardt, Marian Walter","doi":"10.2478/joeb-2024-0015","DOIUrl":"10.2478/joeb-2024-0015","url":null,"abstract":"Cardiovascular diseases are a leading cause of mortality worldwide. Thus, critically ill patients require continuous monitoring of cardiovascular indicators, such as the left ventricular volume (LVV). Although continuous hemodynamic monitoring of patients is desirable, due to technical limitations, current measurement technologies either require manual intervention of the physician or only provide inaccurate results. Intracardiac impedance measurements are a promising approach for continuous assessment of cardiac function. However, developing and evaluating these methods requires a simulation model of the left ventricle with cardiac motion during an entire cardiac cycle. While many models exist for a fixed ventricle size, to date, no freely available models incorporate time and represent the cardiac motion during a complete cardiac cycle. Therefore, we developed four cardiacmechanical left ventricular models with varying ventricle sizes and complexities. Each model focuses on a different aspect of the geometric shape, thus allowing an isolated analysis of the different influences. This paper presents the development of the models and initial results of the impedance analysis. All measured admittances exhibit a high resemblance for all models and a strong, non-linear correlation with the LVV. A comparison between the models shows how the different geometries affect the impedance. The models, thus, provide a useful basis for the development of LVV estimation algorithms.","PeriodicalId":38125,"journal":{"name":"Journal of Electrical Bioimpedance","volume":"15 1","pages":"130-136"},"PeriodicalIF":0.0,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11452780/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142381892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of body orientation and joint movement on local bioimpedance measurements. 身体方向和关节运动对局部生物阻抗测量的影响。

Journal of Electrical Bioimpedance Pub Date : 2024-10-05 eCollection Date: 2024-01-01 DOI: 10.2478/joeb-2024-0016

Sisay Mebre Abie, Alejandro Ortega de Román, Jie Hou

{"title":"Effect of body orientation and joint movement on local bioimpedance measurements.","authors":"Sisay Mebre Abie, Alejandro Ortega de Román, Jie Hou","doi":"10.2478/joeb-2024-0016","DOIUrl":"10.2478/joeb-2024-0016","url":null,"abstract":"The purpose of this pilot study was to determine if body orientation, skin treatment, joint angle, and shoulder arch movements affect localized bioimpedance spectroscopy (BIS) measurement. Nowadays, there are various wearable and portable impedance measurement tools in different shapes and sizes. Therefore, the body position and orientation of the subject during measurement may be of great importance for the comparability of the results. Ultrasound machine was used to measure the thickness of the skin layers and then bioimpedance measurements were performed for ten young men (age=23 ± 5) at room temperature (22°C) for different body orientations, skin treatments, joint angle, and shoulder arch movements. The results were analyzed using statistical methods and graphical presentation using Python and MatLab. Our observations indicate that there is a significant difference between standing straight up, supine and sitting positions. The results show that there is a significant difference between the two skin treatments (alcohol vs tape stripping). Moreover, joint angle and shoulder arch movements also have an impact on the impedance data. Therefore, to be able to control these factors can potentially improve the quality and comparability of the measured impedance data.","PeriodicalId":38125,"journal":{"name":"Journal of Electrical Bioimpedance","volume":"15 1","pages":"137-144"},"PeriodicalIF":0.0,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11452779/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142381890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of temperature on electrical impedance of biological tissues: ex-vivo measurements. 温度对生物组织电阻抗的影响：体外测量。

Journal of Electrical Bioimpedance Pub Date : 2024-09-17 eCollection Date: 2024-01-01 DOI: 10.2478/joeb-2024-0013

Safia Aktar Dipa, Muralee Monohara Pramanik, Mamun Rabbani, Muhammad Abdul Kadir

{"title":"Effects of temperature on electrical impedance of biological tissues: ex-vivo measurements.","authors":"Safia Aktar Dipa, Muralee Monohara Pramanik, Mamun Rabbani, Muhammad Abdul Kadir","doi":"10.2478/joeb-2024-0013","DOIUrl":"10.2478/joeb-2024-0013","url":null,"abstract":"Bioelectrical impedance techniques have been useful in various applications, including body composition analysis, impedance plethysmography, impedance cardiography, lung ventilation, perfusion, and tissue characterization. Electrical impedance methods have also been useful in characterizing different foods like meat, fruits, and beverages. However, the temperature of tissue samples can change their dielectric properties, affecting their impedance. This research investigated the effects of temperature on the impedance of various biological tissues over the frequency range of 10 Hz to 5 MHz. Freshly excised animal tissues (lamb, cow, chicken), fish, fruits, and plants were considered as biological samples. The samples were placed in a test cell and submerged in a water bath heated by a hot plate to vary the temperature. Impedance measurements were conducted using a bioimpedance spectrometer in 2 °C steps within the temperature range of 20 °C to 50 °C. Impedance values decreased with increased temperature across all measurement frequencies for all biological samples. Curve fitting indicated that impedance decreased linearly with temperature, with a mean correlation coefficient of 0.972 for all samples. For all biological samples under investigation, the relative impedance change ranged from -0.58% to -2.27% per °C, with a mean and standard deviation of (-1.42±0.34) %/°C. On average, animal samples exhibited a higher relative temperature coefficient of -1.56% per °C (±0.41) across the frequency range, compared to -1.31% per °C (±0.26) for fruit and vegetable samples. Additionally, the relative temperature coefficient values were generally higher at lower frequencies than at higher frequencies. The findings of this research can be valuable for studies or biomedical applications involving variable tissue temperatures.","PeriodicalId":38125,"journal":{"name":"Journal of Electrical Bioimpedance","volume":"15 1","pages":"116-124"},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11406437/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142297531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving sensitivity in the deep regions of a volume conductor using electrical focused impedance methods. 利用电聚焦阻抗法提高体积导体深部区域的灵敏度。

Journal of Electrical Bioimpedance Pub Date : 2024-09-06 eCollection Date: 2024-01-01 DOI: 10.2478/joeb-2024-0012

Mahjabin Mobarak, K Siddique-E Rabbani

{"title":"Improving sensitivity in the deep regions of a volume conductor using electrical focused impedance methods.","authors":"Mahjabin Mobarak, K Siddique-E Rabbani","doi":"10.2478/joeb-2024-0012","DOIUrl":"https://doi.org/10.2478/joeb-2024-0012","url":null,"abstract":"Bioimpedance measurements are becoming important in probing the human body for diagnosis and monitoring. An age old 4-electrode technique called tetrapolar impedance measurement (TPIM), giving transfer impedance, cannot localize a specific zone besides having large zones of negative sensitivity. A new technique named the focused impedance method (FIM) from Dhaka University (DU), Bangladesh used the algebraic average of two concentric and orthogonal TPIMs, localizing a zone of interest and having reduced magnitudes of negative sensitivity. Earlier, this was implemented with electrodes applied from one side of the human body giving information to shallow depths only. To get information from deeper regions, specifically, of the thorax, the same DU group placed two electrodes of a 4-electrode version of FIM at the front and two at the back in a horizontal plane of the thorax, using physics-based visualization. This was followed by a few quantitative studies using point sensitivity, which supported the concept. However, more quantitative studies still need to be performed, particularly using objects of finite sizes, in order to establish the technique on a stronger footing. The present study was taken up with this objective. A simplified approach was used in which the volume conductor was a rectangular non-conducting container filled with saline of uniform conductivity with an embedded spherical object - first an insulator and then a conductor. Electrodes were placed at specific chosen positions following the above visualization. Percentage change in transfer impedance with the object placed at different internal positions, compared to that without the object was obtained first using COMSOL simulation and then through experimental measurements. These were performed for both TPIM and FIM. The new configuration of 4-electrode FIM gave good depth sensitivity supporting the effectiveness of the new placement of electrodes.","PeriodicalId":38125,"journal":{"name":"Journal of Electrical Bioimpedance","volume":"15 1","pages":"107-115"},"PeriodicalIF":0.0,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11381942/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142297532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Breast cancer recognition by electrical impedance tomography implemented with Gaussian relaxation-time distribution (EIT-GRTD). 利用高斯弛豫时间分布电阻抗断层扫描（EIT-GRTD）识别乳腺癌。

Journal of Electrical Bioimpedance Pub Date : 2024-08-12 eCollection Date: 2024-01-01 DOI: 10.2478/joeb-2024-0011

Galih Setyawan, Prima Asmara Sejati, Kiagus Aufa Ibrahim, Masahiro Takei

{"title":"Breast cancer recognition by electrical impedance tomography implemented with Gaussian relaxation-time distribution (EIT-GRTD).","authors":"Galih Setyawan, Prima Asmara Sejati, Kiagus Aufa Ibrahim, Masahiro Takei","doi":"10.2478/joeb-2024-0011","DOIUrl":"10.2478/joeb-2024-0011","url":null,"abstract":"The comparison between breast cancer recognition by electrical impedance tomography implemented with Gaussian relaxation time distribution (EIT-GRTD) and conventional EIT has been conducted to evaluate the optimal frequency for cancer detection f cancer. The EIT-GRTD has two steps, which are 1) the determination of the f cancer and 2) the refinement of breast reconstruction through time-constant enhancement. This paper employs two-dimensional numerical simulations by a finite element method (FEM) software to replicate the process of breast cancer recognition. The simulation is constructed based on two distinct electrical properties, which are conductivity σ and permitivitty ε, inherent to two major breast tissues: adipose tissues, and breast cancer tissues. In this case, the σ and ε of breast cancer σ cancer, ε cancer are higher than adipose tissues σ adipose, ε adipose. The simulation results indicate that the most effective frequency for breast cancer detection based on EIT-GRTD is f cancer = 56,234 Hz. Meanwhile, conventional EIT requires more processing to determine the f cancer based on image results or spatial conductivity analysis. Quantitatively, both EIT-GRTD and conventional EIT can clearly show the position of the cancer in layers 1 and 2 for EIT-GRTD and only layer 1 for conventional EIT.","PeriodicalId":38125,"journal":{"name":"Journal of Electrical Bioimpedance","volume":"15 1","pages":"99-106"},"PeriodicalIF":0.0,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11387985/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142297530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0