Method for improved safety in externally focused microwave thermotherapy for treating breast cancer

A breast, microwave technology, used in minimally invasive, often in the field

Inactive Publication Date: 2005-10-12
CELSION CANADA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Although the assignee method allows non-invasive removal of cysts from breast tissue, it presents some additional problems due to external application of focused microwaves to the breast and mechanical compression of the breast

Method used

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  • Method for improved safety in externally focused microwave thermotherapy for treating breast cancer
  • Method for improved safety in externally focused microwave thermotherapy for treating breast cancer
  • Method for improved safety in externally focused microwave thermotherapy for treating breast cancer

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Embodiment Construction

[0041] Detailed description of the preferred embodiment

[0042] Dielectric Properties of Breast Tissue

[0043] figure 1 Shown is a detailed lateral view of a female breast (Mammography-A User's Guide, National Council on Radiation Protection and Measurements, NCRP Report No. 85, 1 August 1987, pp. 6). The amount of glandular and fatty tissue within a breast can vary widely, from mostly fatty tissue to very dense breast tissue. Breast cancer cells with high water content usually form in the milk ducts and lobules of breast tissue such as figure 2 Shown (quoted from Dr. SusanLove's Breast Book, Addison Wesley, Mass., 1990, pp.191-196). The first indication is the growth of normal cells in the milk ducts, which is called intraductal hyperplasia, followed by atypical intraductal hyperplasia. When the milk ducts are nearly full, the condition is called intraductal carcinoma in situ. These three symptoms are collectively referred to as precancer. When the intraductal canc...

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Abstract

A method and apparatus that increases safety when employing externally focused adaptive phased array microwave thermotherapy (hyperthermia) for breast cancer treatment include microwave absorbing pads and metallic shielding to prevent undesired or stray surface tissue heating and to cushion the breast from mechanical pressure during breast compression. The microwave absorbing pads are attached on the top of the microwave waveguide thermotherapy applicators and on top of the breast compression paddles. A metallic-shielding strip mounted across the top portion of the microwave applicator aperture acts to block microwave radiation from illuminating the base of the breast and chest wall area. The patient treatment table utilizes a metallic shield to shield the body from stray microwave radiation. Treatments incorporating the safety improvements include thermotherapy for early-stage breast carcinomas, locally advanced breast cancer, ductal carcinoma in-situ, and benign breast lesions.

Description

Background technique [0001] The present invention generally relates to a minimally invasive approach to the application of focused energy, such as adaptive phased array microwave energy, to ductal carcinomas, adenocarcinomas, intraductal hyperplasia, and cysts such as fibroadenomas, compressed breast tissue, etc. Treat benign lesions with hyperthermia. In addition, the methods according to the present invention can also be used to treat undetected microscopically pathologically altered cells with high water content to prevent the occurrence or recurrence of cancerous, precancerous, or benign lesions. [0002] In order to treat a primary breast cancer with hyperthermia, tissue such as a quarter or more of the breast must be heated. It is well known that about 90% of breast cancers occur in the milk duct tissue, and most of the rest occur in the glandular tissue lobules (breast bags) (Harris et al., "The New England Journal of Medicien" Vol.327 , pp, 390-398, 1992). Breast ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N5/02
CPCA61N5/02
Inventor A·J·芬恩J·蒙D·史密斯
Owner CELSION CANADA
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