نتایج جستجو برای: microwave imaging

تعداد نتایج: 505129  

2012
Charlotte Curtis Richard Frayne Elise C. Fear

Current clinical breast imaging modalities include ultrasound, magnetic resonance (MR) imaging, and the ubiquitous X-ray mammography. Microwave imaging, which takes advantage of differing electromagnetic properties to obtain image contrast, shows potential as a complementary imaging technique. As an emerging modality, interpretation of 3D microwave images poses a significant challenge. MR image...

2016
Sollip Kwon Seungjun Lee

Breast cancer is a disease that occurs most often in female cancer patients. Early detection can significantly reduce the mortality rate. Microwave breast imaging, which is noninvasive and harmless to human, offers a promising alternative method to mammography. This paper presents a review of recent advances in microwave imaging for breast cancer detection. We conclude by introducing new resear...

2007
T. Gunnarsson

Microwave imaging is recognized as an efficient diagnostic modality for no invasively visualizing dielectric contrasts in non metallic bodies. The usefulness of this modality results from the existing correlation between dielectric properties and quantities of practical relevance for industrial or biomedical applications. At the beginning of the 80’s, Supélec developed a 2.45 GHz planar microwa...

2007
Meilian Xu Abas Sabouni Parimala Thulasiraman Sima Noghanian Stephen Pistorius

Asymptomatic screening methods are import to lower the mortality rate of breast cancer patients. Technologies available in clinics have weaknesses in terms of sensitivity and specificity. Microwave imaging technique uses the apparent dielectric property contrasts between different breast tissues at microwave frequencies and is a prospective direction to find small tumor at their early stage. Mi...

Journal: :iranian journal of radiation research 0
k. heck department of nuclear medicine, frankfurt university hospital, frankfurt, germany y. korkusuz department of nuclear medicine, frankfurt university hospital, frankfurt, germany c. happel department of nuclear medicine, frankfurt university hospital, frankfurt, germany f. grünwald department of nuclear medicine, frankfurt university hospital, frankfurt, germany h. korkusuz department of nuclear medicine, frankfurt university hospital, frankfurt, germany

background: local ablative treatments play an important role for patients who cannot be treated surgically. radiofrequency ablation is a well-established alternative to surgical treatment of thyroid nodules, however it also has disadvantages. microwave ablation (mwa) is a new minimally invasive treatment promising several improvements. the aim of this retrospective study was to evaluate the eff...

C. Happel, F. Grünwald, H. Korkusuz, K. Heck, Y. Korkusuz,

Background: Local ablative treatments play an important role for patients who cannot be treated surgically. Radiofrequency ablation is a well-established alternative to surgical treatment of thyroid nodules, however it also has disadvantages. Microwave ablation (MWA) is a new minimally invasive treatment promising several improvements. The aim of this retrospective study was to evaluate the eff...

2006
Gary A. Ybarra Qing H. Liu John P. Stang William T. Joines Jasjit Suri Rangaraj M. Rangayyan

2014
Lu Zhu Jiangfeng Liu Yuanyuan Liu Suhua Chen

Due to the complicated structure of microwave radiometric imaging system and the massive amount of data collection in one snapshot, it is difficult to achieve the high spatial resolution image by conventional microwave radiation imaging method based on the Nyquist sampling. In this paper, according to the priori information of the compressible multi-structural information of microwave radiation...

2006
S. Sridhar P. V. Parimi W. T. Lu P. Vodo MA John S. Derov

Negative refraction and left-handed electromagnetism in a photonic crystal are demonstrated in waveguide and free space experiments at microwave frequencies. Precision control to achieve tailor-made refractive indices has been achieved. The negative refraction in these photonic crystals is shown to lead to imaging by a flat lens. We have also developed a generalized theory of flat lens imaging....

2009
Amir H. Golnabi Paul M. Meaney Shireen D. Geimer Margaret W. Fanning Keith D. Paulsen

Microwave imaging for breast cancer detection is becoming a promising alternative technique to current imaging modalities. The significant contrast between dielectric properties of normal and malignant breast tissues makes microwave imaging a useful technique to provide important functional information for diagnoses. However, one of its limitations is that it intrinsically cannot produce high r...

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