Dual-Mode Microwave System to Enhance Early Detection of Cancer

Carr, K.L.; El‐Mahdi, Anas M.; Shaeffer, James

doi:10.1109/tmtt.1981.1130337

Cited by 54 publications

(14 citation statements)

References 4 publications

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“…(1) (2) where are the spatial position vectors, are the radiation angular frequencies, is the unit dyad, K/J is the Boltzman constant, is the absolute temperature in kelvin (K) units, is the tissue conductivity at the radian frequency , and is the ensemble average. Notice that (2) is valid when the radiation photon energy is less than ( , , J/s is the Planck constant).…”

Section: Introductionmentioning

confidence: 99%

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Towards Functional Noninvasive Imaging of Excitable Tissues Inside the Human Body Using Focused Microwave Radiometry

Karanasiou

Uzunoglu

Papageorgiou

2004

IEEE Trans. Microwave Theory Techn.

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Focused microwave radiometry, aiming mainly in clinical applications at measuring temperature distributions inside the human body, may provide the capability of detecting electrical conductivity variations at microwave frequencies of excitable cell clusters, such as in the case of brain tissues. A novel microwave radiometric system, including an ellipsoidal conductive wall cavity, which provides the required beamforming and focusing, is developed for the imaging of biological tissues via contactless measurements. The measurement is realized by placing the human head in the region of the first focus and collecting the radiation converged at the second by an almost isotropic dipole antenna connected to a sensitive radiometer operating at 3.5 GHz. In order to compute the focusing properties of the ellipsoidal reflector, an accurate electromagnetic numerical analysis is developed using a semianalytical method. The experimental part of this study focuses on measurements of activation of the primary somatosensory (SI) brain area, elicited during the application of the cold pressor test, a standard experimental condition inducing pain. Analysis of the measured data from 16 healthy subjects suggests that this methodology may be able to pick up activation of the SI during the pain conditions as compared with the nonpainful control conditions. Future research is needed in order to elucidate all the interacting factors involved in the interpretation of the presented results. Finally, potential limitations to the generalization of our results and strategies to improve the system's response are discussed.Index Terms-Activation of primary somatosensory (SI) cortex, ellipsoidal conductive wall cavity, focused microwave radiometry, imaging of conductivity variations in biological tissues.

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Section: Introductionmentioning

confidence: 99%

“…Notice that (2) is valid when the radiation photon energy is less than ( , , J/s is the Planck constant).…”

Section: Introductionmentioning

confidence: 99%

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Towards Functional Noninvasive Imaging of Excitable Tissues Inside the Human Body Using Focused Microwave Radiometry

Karanasiou

Uzunoglu

Papageorgiou

2004

IEEE Trans. Microwave Theory Techn.

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“…Since its inception in 1974, microwave radiometry has been proposed and used to some extent by many researchers [1][2][3] in order to measure, non-invasively, the temperature distribution within the human body. Furthermore, during the past few years, efforts have been made by several research groups to implement intracranial applications of microwave radiometry [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

A passive 3D imaging thermograph using microwave radiometry

et al. 2004

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“…[3] Preliminary clinical results in patients with known malignancies appear encouraging. [4] Temperature differences (AT) consistent with biopsy-proved malignancies were obtained in four of six primary carcinomas of the breast, five of five patients with lymphoma, and ten of twelve women with recurrent breast cancer.…”

Section: Introductionmentioning

confidence: 99%

Microwave Radiometric Thermal Patterns and Antenna Match in Healthy Female Volunteers

Carr

Blelawa

Regan

et al. 1982

12th European Microwave Conference, 1982

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Microwave thermographic profiles of the breast region of female volunteers were obtained using a 4.7 GHz radiometer. Apparent temperature elevations of about 0.40C were seen in the areolar (nipple) region compared to the other areas of the breast. At least half of this apparent areolar temperature elevation may be attributed to improved antenna match at that site. The importance of antenna match in the proper evaluation of microwave thermographic studies is emphasized.

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Dual-Mode Microwave System to Enhance Early Detection of Cancer

Cited by 54 publications

References 4 publications

Towards Functional Noninvasive Imaging of Excitable Tissues Inside the Human Body Using Focused Microwave Radiometry

Towards Functional Noninvasive Imaging of Excitable Tissues Inside the Human Body Using Focused Microwave Radiometry

A passive 3D imaging thermograph using microwave radiometry

Microwave Radiometric Thermal Patterns and Antenna Match in Healthy Female Volunteers

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