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1

Medical image measurement and characterization: extracting mechanical and thermal stresses for surgery

Lay-Ekuakille Aimé, Ugwiri Moise Avoci, Liguori Consolatina, Singh Satya P., Rahman Md Zia Uhr, Veneziano Domenico

Metrology and Measurement Systems

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2021

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Vol. 28, nr 1

3--21

EN

Whatever the type of surgery related to inner organs, traditional or robotic, the contact with them during surgery is a key moment for pursuing the intervention. Contacts by means of surgery instruments namely scalpels, staples, clamps, graspers, etc. are decisive moments. False, and erroneous touching and manoeuvring of organs operated on can cause irreversible damage as regard morphological aspects (outer impact) and physiological aspects (inner impact). The topic is a great challenge in the effort to measure and characterize damages. In general, electrical instruments for surgery employ the following technologies: ultrasound, radiofrequency (monopolar, and bipolar), and laser. They all result in thermal damages difficult to evaluate. The article proposes a method for a pre-screening of organ features during robotic surgery sessions by pointing out mechanical and thermal stresses. A dedicated modelling has been developed based on experimental activities during surgery session. The idea is to model tissue behaviour from real images to help surgeons to be aware of handling during surgery. This is the first step for generalization by considering the type of organ. The measurement acquisitions have been performed by means of an advanced external camera located over the surgery quadrant. The modelling and testing have been carried out on kidneys. The modelling, carried out through Comsol Multiphysics, is based on the bioheat approach. A further comparative technique has been implemented. It is based on computer vision for robotics. The findings of human tissue behavior exhibit reliable results.

2

Towards big data solutions for industrial tomography data processing

Kowalska Aleksandra, Łuczak Piotr, Sielski Dawid, Kowalski Tomasz, Romanowski Andrzej, Sankowski Dominik

Annals of Computer Science and Information Systems

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2019

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Vol. 18

427--431

EN

This paper presents an overview of what Big Data can bring to the modern industry. Through following the history of contemporary Big Data frameworks the authors observe that the tools available have reached sufficient maturity so as to be usable in an industrial setting. The authors propose the concept of a system for collecting, organising, processing and analysing experimental data obtained from measurements using process tomography. Process tomography is used for noninvasive flow monitoring and data acquisition. The measurement data are collected, stored and processed to identify process regimes and process threats. Further general examples of solutions that aim to take advantage of the existence of such tools are presented as proof of viability of such approach. As the first step in the process of creating the proposed system, a scalable, distributed, containerisation-based cluster has been constructed, with consumer-grade hardware.

3

Predicting blood glucose using an LSTM neural network

El Idrissi Touria, Idri Ali, Abnane Ibtissam, Bakkoury Zohra

Annals of Computer Science and Information Systems

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2019

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Vol. 18

35--41

EN

Diabetes self-management relies on the blood glucose prediction as it allows taking suitable actions to prevent low or high blood glucose level. In this paper, we propose a deep learning neural network model for blood glucose prediction. The model is a sequential one using a Long- Short-Term Memory (LSTM) layer with two fully connected layers. Several experiments were carried out over data of 10 diabetic patients to decide on the model's parameters in order to identify the best variant of the model. The performance of the proposed model measured in terms of root mean square error (RMSE) was compared with the ones of an existing LSTM model and an autoregressive (AR) model. The results show that our model is significantly more accurate; in fact, our LSTM model outperforms the existing LSTM model for all patients and outperforms the AR model in 9 over 10 patients, besides, the performance differences were assessed by thWilcoxon statistical test. Furthermore, the mean of the RMSE of our model was 12.38 mg/dl while it was 28.84 mg/dl and 50.69 mg/dl for AR and the existing LSTM respectively.

4

Stanowisko do badania zdolności koordynacyjnych kończyn dolnych osób uprawiających piłkę nożną

Antosiak-Cyrak K., Kowalski M., Michalski M., Wiczyński G.

Pomiary Automatyka Kontrola

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2013

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R. 59, nr 5

489--492

PL

W artykule opisano stanowisko badawcze zdolności koordynacyjnych kończyn dolnych składające się z układu sterowania oraz z dwóch przyrządów: jednego przeznaczonego do przeprowadzania próby różnicowania ruchów i drugiego do badania równowagi statycznej, częstotliwości ruchów lokalnych i globalnych. Omówiono przebieg poszczególnych prób oraz określono końcowe wyniki pomiaru. Zwrócono uwagę na specyficzne cechy tego typu układów pomiarowych. Przedstawiono przykładowe wyniki badań.

EN

Football is one of the sports that requires proper coordination capabilities of the lower limbs. The evaluation of such capabilities, which must include limb asymmetry, is required at each stage of the training. The evaluation is a basis on which the load, intensity, and training means are selected. So far, such studies have been performed using a stopwatch, a ruler, and a wooden stand, the so-called t-bar. To facilitate the research and improve the reliability of the results, a specialized test stand was built. The design process was aimed at simplicity of the resulting instruments. There were also taken into account available financial resources. This paper describes the research test stand for lower limb coordination capabilities. It consists of a control system and two devices, one for trial of movement differentiation and the other for trials of static balance, as well as local and global movement rate. The operator manages the course of attempts using a PC with dedicated software. The paper discusses the course of each trial task and describes the measurement results. Some of the specific features of this type of measurement systems, visible only during the actual tests, are also mentioned. The basic functions of trials managing software are outlined. Moreover, the paper presents the measurement results obtained from tests of lower limb coordination capabilities.

5

Pulsoksymetr - system pomiarowy z mikrokontrolerem ARM7

Papierz K., Skubis Ł.

Elektrotechnika i Elektronika

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2009

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T. 28, z. 1--2

20-25

PL

W artykule zaprezentowany został zaprojektowany i wykonany przez autorów pulsoksymetr, czyli przyrząd pomiarowy służący do nieinwazyjnego pomiaru natlenienia krwi tętniczej oraz częstości pracy serca. Przedstawione zostały w skrócie teoretyczne podstawy pomiaru oraz zastosowany w skonstruowanym przyrządzie analogowy tor kondycjonowania. Autorzy skoncentrowali się na omówieniu algorytmu obliczania natlenienia krwi na podstawie rejestrowanych sygnałów. Algorytm ten został zaimplementowany na mikrokontrolerze AT91SAM7S256 z rdzeniem ARM7, a także w środowisku LabVlEW, w którym napisane zostało oprogramowanie zwiększające funkcjonalność skonstruowanego pulsoksymetru. Na koniec przedstawione zostało porównanie wyników pomiarów pulsoksymetru komercyjnego oraz skonstruowanego przez autorów przyrządu.

EN

In the paper is presented the pulse oximeter designed and implemented by authors. It is a measurement instrument to non-invasive measure of arterial blood oxygen and pulse rate. Short theoretical basis and circuits of analog signals processing applied in instrument also are shown. Authors focused at algorithm calculating blood's oxigenation based on registered signals. This algorithm was implemented in AT91SAM7S256 microcontroller with ARM7 core and also in LabVlEW environment. This application increases constructed pulse oximeter's functionality. At the end is shown a comparison between measurement results given by commercial pulse oximeter and one constructed by authors.

6

Application of tone-pip stimuli of different rise-times for wave V identification in auditory brainstem responses (ABR) procedures

Hatliński G. J., Kochanek K., Piłka A., Bochenek W.

Biocybernetics and Biomedical Engineering

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2008

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Vol. 28, no. 4

51-57

EN

Application of tone-pip stimuli of elongated rise-times in examination of auditory brainstem responses (ABR TON) makes it possible to detect desynchronization of auditory nerve fibers in a much earlier stage of retrocochlear pathology than it would be possible when applying click-type acoustic stimuli. However, longer rise-time deteriorates synchronization of responses from individual nerve fibers. It makes the assessment of ABR morphology more difficult, in particular it hinders correct recognition of wave V. The quality of ABR recordings might be poor when examining retrocochlear pathologies, and/or in presence of excessive artifacts. The authors propose that, in the cases when accurate evaluation of wave V in ABRs recorded with the use of long-rise tone-pip stimuli (ABR TON, 4 or 8 cycles rise-time) is difficult, one should apply tone-pip stimuli of shortened rise-time (ABR TON-2, 2 cycles rise-time) to correctly identify wave V.

7

Pomiary fizykalnych parametrów organizmu

Dziuban E.

Pomiary Automatyka Kontrola

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2003

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R. 49, nr 7-8

26-28

PL

Pomiary "in vivo" fizykalnych parametrów organizmu ludzkiego wymagają rozwiązania licznych trudności metrologicznych i technicznych. Wiążą się one z małym poziomem mocy oraz wąskim zakresem częstotliwości i obecności składowej stałej, tak charakterystycznymi dla wielkości mierzonych w biomedycynie oraz interferencjami i zakłóceniami pochodzacymi od innych organów i od otoczenia. Zasadniczą wagę ma ponadto zapewnienie bezpieczeństwa pacjenta. Na tle zwięźle przedstawionych problemów, jakie stwarzają metrologom pomiary w biomedycynie zaprezentowano przykład zastosowania bezdotykowego pomiaru temperatury do badania odpowiedzi termicznej wywołanej przez nakłuwanie wykonywane w punktach biologicznej aktywności.

EN

Measurement organism`s physical parameters cause special metrological and technical problems. They occur because: a) signals collected from the human organism have low power and narrow frequency band, b) signals originated from the organs interfere useful signal, c) disturbances in clinical environment make dificult receiving biomedical signals, d)both noninvasive and invasive measurements should provide absolute electrical shock protection. For example results of non-contact measurements of temperature changes evoked by needle therapy at biological active points are presented.

8

Technika pomiarowa w medycynie - problemy dydaktyki

Dziuban E.

Zeszyty Naukowe. Elektryka / Politechnika Łódzka

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2001

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z. 98

251-255

PL

Program przedmiotu "Technika pomiarowa w medycynie" prowadzonego dla specjalności Metrologia i Systemy Pomiarowe prezentuje zagadnienia wybrane z dziedziny pomiarów biomedycznych, uzupełniające edukację inżyniera metrologa. W wykładzie skupiono się na pomiarach organizmów żywych, napotykanych przy tym ograniczeniach i zakłóceniach oraz bezpieczeństwie obiektu. Ćwiczenia laboratoryjne ilustrujące problemy przetwarzania sygnałów biomedycznych uzupełniają wykład.

EN

Author has lectured on Medical Measurements on IX semester of speciality Metrology and Measurement Systems, faculty of Electrotechnics and Computer Science for 6 years. Some didactic problems which earlier author has had to consider are included in the paper: the aim of lecture, its content, and the level of details of the subject. Moreover the ideas and assumptions for the project of the laboratory stands are presented.