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  1. 10 Inżynier Medyczny - Fizyk
  2. 10 Inżynier Medyczny : fizyka, inżynieria, elektroradiologia, radiologia
  3. 10 Inżynier i Fizyk Medyczny
  4. 4 Biocybernetics and Biomedical Engineering
  5. 2 Bio-Algorithms and Med-Systems
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  1. 2 2022
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  1. 3 Gaweł G.
  2. 2 Boniński P.
  3. 2 Cichocki A.
  4. 2 Jankowski P.
  5. 2 Jędrzejewska M.
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1
Content available Utilization of an energy-resolving detection system for mammography applications : a preliminary study
100%
Taha E. M. , Elmoujarkach E. A. , Balamesh A. , Alzaidi S. A. , Alhawsawi A. M.
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2022
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tom Vol. 67, No. 2
35--40
EN
Breast cancer remains one of the major causes of mortality among female cancer patients. This fact caused a spark in the medical field, which in turn helped to improve the diagnostic and treatment of breast cancer patients over the years making this field always active with new ideas and innovative methods. In our study, a new method was explored using an energy-resolving detection system made from a NaI (Tl) scintillation detector to detect the gamma photons from an Am-241 radiation source to try and construct an image by scanning the American College of Radiology (ACR) mammography phantom. In addition to the experimental work, a Geant4 Application for Tomographic Emission (GATE) toolkit was used to investigate more complex options to improve the image quality of mammographic systems, which is limited by the experimental setup. From the experimental setup, the researchers were able to construct an image using the 26.3 keV and the 59.5 keV energy photons, to show the largest size tumour (12 mm) in the ACR phantom. With an improved setup in the simulation environment, the majority of the ACR phantom tumours was visible using both energy windows from the 26.3 keV and the 59.5 keV, where the 26.3 keV yielded better quality images showing four tumours compared to three when using 59.5 keV. The simulation results were promising; however, several improvements need to be incorporated into the experimental work so that the system can generate high-resolution mammographic images similar to the ones obtained by the GATE simulation setup.
2
Content available Analogowe i cyfrowe systemy obrazowania w mammografii -jakość obrazu i zdolność detekcji
100%
Oborska-Kumaszyńska D. , Wiśniewska-Kubka S.
Acta Bio-Optica et Informatica Medica. Inżynieria Biomedyczna
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2010
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tom Vol. 16, nr 1
56-64
PL
Dla mammografii skreeningowej w Rozp. Min. Zdr. z 31.08.2009 r. zostały określone wymagania techniczne dla obrazowania w systemach analogowych (błona rtg) i systemach cyfrowych {CR-compuled radiography i DR - digital radiography) akwizycji obrazu. Jednocześnie formalnym problemem stał się fakt, że za tym dokumentem legislacyjnym nie poszły żadne regulacje prawne dotyczące zakresu kontroli jakości (parametry) i metodoIogii pomiarowej dla systemów cyfrowej akwizycji obrazu. Również w ramach stmlrtur nadzorujących działania w skreeningu pracowni mammograficznych nie stworzono żadnych kryteriów oceny jakości w tych formach obrazowania. Przegląd raportów AAPM (American Association of Physicists in Medicine) i ACR (American College of Radioly) oraz zaleceń europejskich (European Guidelines EUREF) wskazuje na to, jak różne formy kontroli, zakres parametrów oraz metodologie pomiarowe obowiązują dla różnych form obrazowania.
3
Content available Cancer awareness and socioeconomic status are associated with mammography screening participation and early detection of breast cancer
100%
Badur W. , Donizy P. , Szełemej J. , Kornafel J. , Hałoń A. , Matkowski R.
Family Medicine & Primary Care Review
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2014
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nr 4
329-332
4
Content available remote Application of DQE for quantitative assessment of detectors to estimate AEC efficiency in digital mammography
100%
Fabiszewska E. , Wysocka-Rabin A. , Dobrzyńska M. , Skrzyński W. , Pasicz K.
Polish Journal of Medical Physics and Engineering
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2021
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tom Vol. 27, Iss. 1
51--56
EN
Optimisation of the detector’s exposure parameters settings for image quality and patient dose is an important task in digital mammography. Assessment of a digital detector’s performance can be done objectively and without operator bias by determining the Detective Quantum Efficiency (DQE). The authors of this article aim to prove that the performance of the AEC system can be objectively portrayed through DQE. The results were examined for influence of KAD changes on DQE values and to determine if it was possible to obtain similar DQE values for different exposures. While analysing the effect of the operation of the AEC system described with DQE, the doses received by women during mammography examinations were considered, as well. The AEC system’s exposure control mechanism cannot guarantee the same DQE value for different object thicknesses. When the object thickness increases, the AEC system should increase the KAD value to obtain the same DQE value. The result of increasing KAD would be the increase of mean glandular dose for some women. However, assuming that DQE is a good indicator of image quality, introducing the proposed changes to the AEC system’s operation would result in the same image quality for all breast thicknesses. This approach to DQE use for AEC system evaluation is independent of the image processing procedure and can be the basis for changes to system calibration done by the manufacturer’s technical support team.
5
Content available remote Pilot study of patient and phantom breast dose measurements in Bulgaria
88%
Avramova-Cholakova S. , Vassileva J.
Polish Journal of Medical Physics And Engineering
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2008
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tom 14
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nr 1
21-32
EN
A pilot study of breast dose measurements on two mammography units in Bulgaria was conducted. The mean glandular doses (MGDs) to samples of approximately 60 women per unit were measured. MGD with a standard PMMA phantom was measured as well. The MGDs were calculated according to the European protocol on dosimetry in mammography as well as to the European protocol for the quality control of the physical and technical aspects of mammography screening. The measured women's MGDs were divided into three groups depending on the compressed breast thicknesses. The results for the group of thicknesses in the interval 40-60 mm were compared with the results from the measurements on the standard 45 mm PMMA phantom. Some differences were found which could be due to errors in breast thickness measurements, differences in breast and phantom densities and other factors. A standardized procedure was elaborated for patient dose measurement and calculation both from patient and phantom studies.
6
Content available remote Evaluation of glandular dose in mammography in presence of breast cysts using Monte Carlo simulation
88%
Deevband M. R. , Kaveh Z. , Ghorbani M. , Khajetash B.
Polish Journal of Medical Physics and Engineering
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2021
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tom Vol. 27, Iss. 1
41--50
EN
Background: Normalized glandular dose (DgN) is an important dosimetric quantity in mammography. Aim: In this study, the effect of the presence of breast cysts and their size, number and location on DgN is evaluated. Materials and methods: The effect of the presence of cysts in breast was examined using MCNPX code. This was performed by taking homogeneous breast phantoms containing spheroid breast cysts into account. The radius of the cysts, numbers of the cysts, and depth of the cysts, and their location were variable. Various electron energies were also considered. Finally, these results were compared with the results of a cyst-less breast phantom. Results: The results show that the effect of the presence of cysts in the breast depends on the size, number and location of cysts. The presence of cysts at lower depths leads to a decrease in the DgN values, compared to the breast phantom without cysts. The presence of cysts in the breast phantom has an effect of -7 to +14 percent on the DgN values under the conditions considered in this modeling. This effect is independent of the X-ray tube voltage, the breast phantom thickness, and glandular ratio, and depends only on the number and size and location of the cysts. The bigger radius and number of cysts, the greater effect on DgN value.
7
Content available remote Mammografia : nowe wyzwania
88%
Kowski R.
|
2014
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tom Vol. 3, nr 2
89--90
PL
Ósme „ŁOSiowe Spotkanie Szkoleniowe”, które odbyło się 4-5 kwietnia 2014 roku w Łodzi, poświęcono trzem tematom przewodnim: nowe techniki i wyzwania pomiarowe w mammografii, monitory medyczne, ich główne parametry, możliwości i ograniczenia oraz oprogramowanie ułatwiające nadzór nad dawkami i realną ich optymalizację.
8
Metoda detekcji guzków w obrazach mammograficznych wykorzystująca transformację Rayleigha
88%
Boniński P. , Wróblewska A. , Przelaskowski A.
Prace Naukowe Politechniki Warszawskiej. Elektronika
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2007
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tom z. 161
55-61
EN
Breast cancer is one of the most dangerous tumors for middle-aged and older woman, and mammography is its most reliable early detection method. In this paper, a fully automated method for detection of mass-like objects is proposed. The main stage of the algorithm is non-linear histogram conversion based on Rayleigh transformation. That approach gives us mammograms with significantly improved masses visibility and, thus, easier way to segment a potential mass object. Achieved results confirm the usefulness proposed method for application in mammography-oriented content-based image retrieval system and are comparable to to other state-of art methods.
9
Content available Radon‐wavelet based novel image descriptor for mammogram mass classification
88%
Obaidullah S. M. , Ahmed S. , Gonçalves T. , Rato L.
|
|
tom Vol. 14, No. 2
74--80
EN
Mammography based breast cancer screening is very popular because of its lower costing and readily availability. For automated classification of mammogram images as benign or malignant machine learning techniques are involved. In this paper, a novel image descriptor which is based on the idea of Radon and Wavelet transform is proposed. This method is quite efficient as it performs well without any clinical information. Performance of the method is evaluated using six different classifiers namely: Bayesian network (BN), Linear discriminant analysis (LDA), Logistic, Support vector machine (SVM), Multilayer perceptron (MLP) and Random Forest (RF) to choose the best performer. Considering the present experimental framework, we found, in terms of area under the ROC curve (AUC), the proposed image descriptor outperforms, upto some extent, previous reported experiments using histogram based hand‐crafted methods, namely Histogram of Oriented Gradient (HOG) and Histogram of Gradient Divergence (HGD) and also Convolution Neural Network (CNN). Our experimental results show the highest AUC value of 0.986, when using only the carniocaudal (CC) view compared to when using only the mediolateral oblique (MLO) (0.738) or combining both views (0.838). These results thus proves the effectiveness of CC view over MLO for better mammogram mass classification.
10
Content available remote Tomosynteza : nowa nadzieja mammografii
75%
Rogaliński M.
|
2014
|
tom Vol. 3, nr 2
91
11
Content available remote Mammografia - kontrola jakości „punktowa” czy długoterminowa?
75%
Trybusz A. , Grobelna G. , Jankowski P. , Jędrzejewska M. , Węckowski B.
Inżynier i Fizyk Medyczny
|
2013
|
tom Vol. 2, nr 2
57--59
PL
Obecnie kontrola jakości skupia się na sprawdzeniu parametrów wyszczególnionych w załączniku nr 6 do Rozporządzenia Ministra Zdrowia z 18.02.2011 r. [1] interpretowanych jako parametry niezależne, wzajemnie niepowiązane. Równie ważna jak bieżąca sprawność jest kontrola stałości tak zwanej długotrwałej. W obecnej sytuacji, gdy w ramach akredytacji wprowadzono obowiązek porównań międzylaboratoryjnych, jest ona możliwa nawet w przypadku przeprowadzania sprawności technicznej aparatury rentgenowskiej każdorazowo przez inne laboratorium badawcze. Dla celów porównawczych przedstawiono wyniki sprawności technicznej mammografu z okresu trzech kolejnych testów specjalistycznych. Na potrzeby opisu pominięto nazwy aparatu oraz użytych błon mammograficznych.
12
Content available remote Comparison of the effectiveness of some objective quality measures for digital mammograms
75%
Boniński P. , Kazubek M.
Biocybernetics and Biomedical Engineering
|
2004
|
tom Vol. 24, no. 3
51-60
EN
A number of objective gray scale image quality measures were evaluated. The examined set contained well-known methods as well as new promising techniques. The main goal of this study was to propose a measure applicable in an automatic mammogram quality measure and improvement system. For this reason, the mammograms with distortions corresponding to the real distortions, such as occuring in image creation process in classical and digital mammography, were used as test images. The results obtained allow choose the effective method of such measure.
13
Content available remote Template matching by means of correlation coefficient for detecting cancerous masses in mammograms
75%
Bator M. , Nieniewski M.
Machine Graphics and Vision
|
2007
|
tom Vol. 16, No. 3/4
329-345
EN
The paper presents the authors' experiences with the detection of cancerous masses in mammograms. The described detection method is based on the use of multiscale template matching and multiresolution. As a measure of similarity, the correlation coefficient is adapted. The main conclusion drawn from the conducted experiments is that by sufficiently dense scaling of the templates one can achieve FROC (Free Response Operating Characteristics) curves of the same quality as the curves obtained in the literature with considerably more sophisticated methods. The results were calculated for full mammograms of the entire MIAS database, in contrast to the literature, where the results are often given for regions of interest or for selected images. Several options for the templates were investigated, including three variants based on the hemispherical gray level distribution, as well as the optimal choice of the increasing scale of templates covering the whole range of diameters of masses.
14
Content available Ionizing radiation and volumetric mammographic density
75%
Pepłońska B. , Mirowski M. , Kałużny P. , Domienik-Andrzejewska J.
|
|
nr 5
635-649
EN
Objectives Mammographic density (MD) refers to the percentage of dense tissue of an entire breast and was proposed to be used as a surrogate marker for breast cancer. High-dose ionizing radiation (IR) has been recognized as a breast cancer risk factor. The aim of our study was to investigate association between lifetime low dose ionizing radiation (LDIR) and MD. Material and Methods A cross-sectional study included 467 women aged 40–60 years who underwent screening mammography in Łódź, Poland. The digital mammography examination of the breasts included both craniocaudal and mediolateral oblique views. The volumetric breast density (VBD) (%) and fibrograndular tissue volume (FG) (cm3) were determined based on the analysis of mammographic image (“for processing”) using Volpara Imaging Software. The exposure to IR was estimated for each individual, based on the data from interviews about diagnostic or therapeutic medical procedures performed in the area of the neck, chest, abdomen and spine, which involved X-rays and γ rays and the data about the doses derived from literature. Linear and logistic regression were fitted with VBD and FG as the outcomes and organ breast dose, effective dose and number of mammographies as the determinants, adjusted for major confounders. Results The analyses showed no association between VBD or FG and the breast organ dose or the effective dose. The only significant finding observed concerned the association between the number of mammographies and the FG volume with β coefficient: 0.028 (95% CI: 0.012–0.043), and predicted mean FG volume >13.4 cm3 among the women with >3 mammographies when compared to those with none. Conclusions This study does not, in general, provide support for the positive association between LDIR and MD. The weak association of the FG volume with the number of mammographies warrants further verification in larger independent studies.
15
Content available The role of occupational health services in cancer prevention – which factors determine the implementation of preventive measures?
75%
Wiszniewska M. , Marcinkiewicz A. , Lipińska-Ojrzanowska A. , Kalska-Sochacka K. , Walusiak Skorupa J.
International Journal of Occupational Medicine and Environmental Health
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2021
|
tom 34
|
nr 6
723-736
EN
ObjectivesEpidemiological data on cancer diseases are alarming. The workplace has become an increasingly important site for disseminating health information and implementing health promotion activities. Occupational medicine physicians (OMPs) have the opportunity to carry out primary and secondary preventive activities focused on civilization diseases, especially cancer. The aim of this study was to evaluate the potential of OMPs in cancer prevention, including the analysis of factors determining the implementation of preventive measures, as part of standard healthcare for employees.Material and MethodsThe study was conducted among 362 OMPs. The interviews were carried out by the computer assisted telephone interview (CATI) method.ResultsOver 60% of the surveyed OMPs are ready to implement cancer preventive activities among employees. The doctors with the longest seniority in occupational health services are more likely to declare unwillingness to implement cancer preventive activities. Patient’s consent, informing women about the program and adjusting the time of the medical visit are the most important conditions for introducing cancer prevention programs by OMPs. Neither seniority nor the number of examinations performed by a physician influenced the currently implemented cancer preventive activities as part of occupational health services (including the evaluation of cancer risk factors occurrence among employees).ConclusionsIn Poland, OMPs are willing to implement cancer preventive activities among employees, but their current activity in this area is limited and needs development. The most specific actions should be addressed to doctors with the longest seniority in occupational health services, who are frequently unwilling to implement cancer preventive activities. Strengthening the preventive potential of Polish occupational health services requires a systemic approach to the scope and way of action of healthcare professionals.
16
Content available remote Ocena wyników audytu klinicznego w Populacyjnym Programie Wczesnego Wykrywania Raka Piersi w województwie małopolskim w latach 2007-2012
75%
Tomera M. , Podloch M.
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2014
|
tom Vol. 3, nr 3
135--139
PL
W Polsce od 2005 roku realizowany jest program skryningowy raka piersi. Od 2007 roku jego jakość jest monitorowana poprzez coroczne kontrole jakości oraz audyt kliniczny. Celem pracy była analiza wyników audytu klinicznego przeprowadzonego w pracowniach mammograficznych województwa małopolskiego w latach 2007-2012.
EN
Since 2005 a special breast cancer screening program has been realized in Poland. Its quality has been monitored through annual quality controls and clinical audit since 2007. The aim of this study was to analyze the results of the clinical audit which was carried out in mammography laboratories in the province of Małopolska in 2007-2012.
17
Content available Comparative study on the classification methods for breast cancer diagnosis
75%
Zhao Q. , Qiu Y. , Zhou G. , Cichocki A.
|
|
nr 6
18
Content available remote Procedura oceny mammogramów w ramach audytu klinicznego
75%
Tomera M.
Inżynier i Fizyk Medyczny
|
2013
|
tom Vol. 2, nr 4
211--212
PL
Celem pracy jest przedstawienie sposobu oceny mammografów przeprowadzanej w ramach audytu klinicznego.
EN
The aim of the study is to present a method for assessing mammograms as part of clinical audit.
19
Content available remote Ontologia mammografii - struktura modelu, definicje i instancje pojęć
75%
Podsiadły-Marczykowska T. , Guzik A.
Bio-Algorithms and Med-Systems
|
2005
|
tom Vol. 1, no. 1/2
247--252
PL
W pracy przedstawiono problemy występujące w dziedzinie mammografii, takie jak: zmienność interpretacji mammogramów, konieczność sfomułowania bardziej efektywnych kryteriów do oceny i opisu mammogramów i niepokojąco wysoki odsetek pominiętych lub błędnie zinterpretowanych przypadków raka piersi. Stwierdzono, że dla pełnego wykorzystania potencjału tkwiącego w badaniu mammograficznym, konieczna jest systematyzacja i objaśnienie struktury wiedzy tego fragmentu medycyny - ontologia mammografii. Podano definicję ontologii, opisano metodologię jej tworzenia i użyty edytor - Protege-2000. Opisano ogólne zasady tworzenia ontologii mammografii, podział modelu na moduły i hierarchię klas w poszczególnych modułach. Przedstawiono definicje podstawowych klas modelu i ich instancje.
EN
The paper presents mammographic ontology model of restricted domain of radiology. Method used to build the model, ontology editor, the structure of the model, class hierarchy, definitions of the main notions in the domain and their instances have been presented.
20
Content available remote Pozycjonowanie w mammografii
75%
Łuczyńska E.
|
2014
|
tom Vol. 3, nr 1
11--18
PL
W pracy przedstawiono techniki pozycjonowania w badaniu mammograficznym. Omówiono przygotowanie do badania oraz jego realizację w projekcjach podstawowych oraz dodatkowych, diagnostycznych. Zwrócono uwagę na procedury oraz błędy, których należy unikać.
EN
The techniques of positioning in mammography, were presented in the article. The preparation for examination and as its realization in views considered as a gold standard as well as additional diagnostic views, were discussed.
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