| 000 | 05117nlm1a2200493 4500 | ||
|---|---|---|---|
| 001 | 663031 | ||
| 005 | 20231030041840.0 | ||
| 035 | _a(RuTPU)RU\TPU\network\34200 | ||
| 035 | _aRU\TPU\network\15251 | ||
| 090 | _a663031 | ||
| 100 | _a20210121a2020 k y0engy50 ba | ||
| 101 | 0 | _aeng | |
| 135 | _adrgn ---uucaa | ||
| 181 | 0 | _ai | |
| 182 | 0 | _ab | |
| 200 | 1 |
_aUse of multi-angle ultra-wide band microwave sounding for high resolution breast imaging _fS. E. Shipilov, A. I. Eremeev, V. P. Yakubov [et al.] |
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| 203 |
_aText _celectronic |
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| 300 | _aTitle screen | ||
| 320 | _a[References: р. 5157 (13 tit.)] | ||
| 330 | _aPurpose: This report proposes an approach to develop a method of microwave imaging for early, non-invasive diagnosis of breast tumors. Here we describe a data-processing method for obtaining radio images of biological heterogeneities and a new method for filtering static noise in received signals. Methods: A specialized radar system was developed in the present study and used to perform sounding of synthetic phantoms with the dielectric properties of breast tissue in the range of 2-8 GHz. Datasets thus contained synthetic structures that imitated the dielectric properties of breast tissues and tumors. The permittivity values of the created artificial materials were verified using a waveguide cell. Tumors were simulated via plastic balls with a diameter of 1 cm that were filled with saline. A special ultra-wide band (UWB) radar system developed at Tomsk State University was used to register radar responses from the phantoms. The radar system included the vector reflectometer, the UWB antenna, and the mechanical scanner that provided sounding in the hemisphere. We also used the time-domain signals processing method to obtain the radio image signals. In this method, all signals received during scanning in the hemisphere are added with calculated delay for the given focus point. Special filtering of the constant components of the signal at each of the angular sounding latitudes was used to eliminate clutter in the received signal. This solution allowed us to account for additive clutter in the received signal from structural elements during scanning in the hemisphere. The influence of the number of angles on the quality of the resulting radio image was evaluated. | ||
| 330 | _aResults: The phantoms of a female breast and a malignant tumor from artificial materials with electro physical characteristics close to those of real tissues have been developed. This facilitated verification of the proposed method for constructing radio images under more clinically relevant conditions. The proposed filtering of the constant components of the signal effectively doubled the signal-to-noise ratio in the resulting radio image compared with the standard algorithm of clutter filtering. The influence of different numbers of scan points on the quality of the final radio image are presented herein. It is concluded that it is sufficient to use not more than 600-800 sounding points for acceptable image quality. A further increase in the number of angles does not significantly improve image quality despite increasing the scan time. Conclusions: Scanning in the hemisphere of the breast phantom using the proposed method of clutter filtering show that multi-angle microwave imaging can form accurate three-dimensional (3D) images with double the level of signal-to-clutter compared with the standard filtering approach. The images of artificial tumors were obtained when sounding in the range of 2-8 GHz with the resolution of about 5-7mm. | ||
| 333 | _aРежим доступа: по договору с организацией-держателем ресурса | ||
| 461 | _tMedical Physics | ||
| 463 |
_tVol. 47, iss.10 _v[P. 5147-5157] _d2020 |
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| 610 | 1 | _aэлектронный ресурс | |
| 610 | 1 | _aтруды учёных ТПУ | |
| 610 | 1 | _abreast cancer | |
| 610 | 1 | _adiagnostic imaging | |
| 610 | 1 | _amicrowave imaging | |
| 610 | 1 | _aрак | |
| 610 | 1 | _aмолочные железы | |
| 610 | 1 | _aвизуализация | |
| 701 | 1 |
_aShipilov _bS. E. _gSergey Eduardovich |
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| 701 | 1 |
_aEremeev _bA. I. _gAleksandr Ivanovich |
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| 701 | 1 |
_aYakubov _bV. P. _gVladimir Petrovich |
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| 701 | 1 |
_aFedyanin _bI. S. _gIvan Sergeevich |
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| 701 | 1 |
_aSatarov _bR. N. _gRail Nailevich |
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| 701 | 1 |
_aZavjyalova _bK. V. _gKseniya Vladimirovna |
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| 701 | 1 |
_aShipilova _bS. S. _cspecialist in the field of higher professional education _cAssociate Professor of Tomsk Polytechnic University, candidate of physico-mathematical Sciences _f1979- _gSvetlana Sergeevna _2stltpush _3(RuTPU)RU\TPU\pers\35012 |
|
| 701 | 1 |
_aBalzovsky _bE. V. _gEvgeny Vladimirovich |
|
| 712 | 0 | 2 |
_aНациональный исследовательский Томский политехнический университет _bШкола базовой инженерной подготовки _bОтделение русского языка _h8030 _2stltpush _3(RuTPU)RU\TPU\col\23517 |
| 801 | 2 |
_aRU _b63413507 _c20210121 _gRCR |
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| 856 | 4 | _uhttps://doi.org/10.1002/mp.14408 | |
| 942 | _cCF | ||