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【medical-news】一种检测乳腺癌的新仪器
Whether a painless, portable device that uses electrical current rather than X-ray to look for breast cancer could be an alternative to traditional mammograms is under study at the Medical College of Georgia.
MCG is one of 20 centers internationally and the only place in Georgia studying new technology developed by Z-Tech Inc., to compare traditional mammograms with impedence scanning, a technique based on evidence that electrical current passes through cancerous tissue differently than through normal tissue.
This phase of the study will focus on women age 40-50. Older women have less dense breast tissue so cancer is easier to find, says Dr. James Craft, MCG radiologist and principal investigator on the study. Mammograms, also performed in the study, are more accurate in this population, so this phase will be a tougher test of the new technology, he says. The first phase of the study, which began in 2005, was open to women of all ages.
“Normal breast tissue is very dense, especially in younger women, and can hide tumors,” Dr. Craft says. “While we’ve known for a while that water flows more freely through cancerous cells, we also know that electrical current flows easier through cancerous and tumor tissue.”
The Z-Tech scan works by placing a flower-shaped grouping of electrodes over each breast and sending a small, painless amount of electricity through them. Unlike traditional mammography, the scan does not involve breast compression or radiation.
“It’s like doing an EKG of the breast,” Dr. Craft says.
A computer immediately calculates and presents a report based on the electrical signature of the breast tissue. Rather than waiting on breast image from a traditional mammogram, the computer immediately notes whether the scan is positive or negative for cancer.
However, for study purposes, neither Dr. Craft nor the patient will know the results. Patients must undergo a mammogram within 90 days, which Dr. Craft interprets. Z-Tech compares those results to the electrical study.
The hope is that the new test – called HEDA for Homologous Electrical Difference Analysis – will provide an alternative to mammograms. While Dr. Craft believes that having this test should help find more cancers, he doesn’t think it will replace traditional mammography.
“This method doesn’t use radiation, is portable and there is no pain associated with the squeezing that mammograms require,” he says. “I can see it being used as an additional test. I don’t think it will replace mammography, but it could increase our chances of catching breast cancer.”
The second phase of the Z-Tech trial is open to women age 40-50 having routine mammograms as well as those who have a suspicious lump scheduled for biopsy.
http://www.sciencedaily.com/releases/2008/07/080722113019.htm 本人已认领该文编译，48小时后若未提交译文，请其他战友自由认领。 Breast Cancer Detection: A Simpler Alternative To Mammograms?
乳腺癌检测：一种检测乳腺癌的新仪器？
Whether a painless, portable device that uses electrical current rather than X-ray to look for breast cancer could be an alternative to traditional mammograms is under study at the Medical College of Georgia.
乔治亚州立大学医学院正在进行一项改变传统乳腺影像学检测方法的研究：是否能用一种无痛的易携带的电流仪器来代替现在X射线的方法来检测乳腺癌。
MCG is one of 20 centers internationally and the only place in Georgia studying new technology developed by Z-Tech Inc., to compare traditional mammograms with impedence scanning, a technique based on evidence that electrical current passes through cancerous tissue differently than through normal tissue.
乔治亚州立大学医学院（MCG）由Z-Tech有限公司在世界上设立的开发新技术项目的20个中心之一，也是乔治亚州唯一的研究中心。与传统应用阻抗扫描的影像学检查相比，一项新的技术可以利用电流通过肿瘤组织与正常组织的不同来检测肿瘤。
This phase of the study will focus on women age 40-50. Older women have less dense breast tissue so cancer is easier to find, says Dr. James Craft, MCG radiologist and principal investigator on the study. Mammograms, also performed in the study, are more accurate in this population, so this phase will be a tougher test of the new technology, he says. The first phase of the study, which began in 2005, was open to women of all ages.
乔治亚州立大学医学院的放射学家同时兼任本项研究的主要研究者Dr. James Craft说：“现阶段的研究主要集中在年龄40-50岁的妇女。因为年龄较大的妇女乳腺组织密度低，所以肿瘤比较容易发现。研究也包括乳腺的影像学检查，在这部份人群中影像学检查在诊断上表现得更为准确，因而这项新技术在现阶段测验更有难度。
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作者:admin@医学,生命科学 2011-08-23 05:14
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