tumors

U.S. report: FCC's cell phone radiation guidelines outdated

The Federal Communications Commission should review its cell phone radio-frequency (RF) exposure limit, which was set 15 years ago, because it does not include testing for potential harm from holding phones directly against the body or factor in the latest research, a government report recommended today.

When the RF exposure limit of 1.6 watts per kilogram specific absorption rate (SAR) was established in 1996, phones were bigger, bulkier, and carried in holsters outside of clothes and not in pockets, said Marcia Crosse, director of health care at the U.S. Government Accountability Office (GAO) and co-author of the report. … Read more

Houston hospital live tweets successful brain surgery

People are willing to tweet just about anything -- in 2009, Erykah Badu famously tweeted away during labor, and just this past month, the National Zoo live-tweeted the artificial insemination of a giant panda.

So it should come as no surprise that earlier today folks at the Houston-based Memorial Hermann Hospital live-tweeted via the handle @houstonhospital the "rabid play-by-play" of the removal of a tumor from a 21-year-old woman's brain.

The procedure spanned several hours and resulted in dozens of tweets, video uploads on YouTube, and a dizzying array of graphic photos via Twitter and Pinterest.

Dr. … Read more

Link between cell phones and cancer may be unjustified

Are people endangering with their lives, risking cancer, brain tumors, and infertility by talking on their cell phones? A new review by the U.K.'s Health Protection Agency (HPA) says no.

Scientists conducting the review looked at hundreds of studies and assessed all major research into "low-level radio frequency," which they said comes not only from mobile phones but also TV and radio broadcasting, Wi-Fi, and other technologies, and concluded that everyone in the U.K. is exposed to "universal and continuous" radio frequency, according to the BBC.

Despite this constant exposure, the scientists said … Read more

New technique uses virtual slides to view tissue in 3D

Today, pathologists and researchers must cut super-thin slices of tissue samples to view them on a microscope -- a labor-intensive process that renders 3D images created from hundreds of 2D sections prohibitively expensive.

Not to mention tedious to construct. Imagine if a single scene in Halo was presented as a series of 2D images one must perfectly align before getting the lay of, say, a single battleground.

Now, computer scientists and medical researchers at the University of Leeds in the United Kingdom say they've devised a novel workaround in the form of a digital scanning system that produces 3D views of tissue samples … Read more

New mini sensor can measure brain's magnetic activity

An atom-based magnetic sensor the size of a sugar cube has successfully measured human brain activity, a milestone that could ultimately lead to advancing our understanding of a wide range of neurological conditions and diseases, according to researchers at the National Institute of Standards and Technology (NIST).

We first reported on an earlier iteration of the sensor, which has been in development since 2004, back when the team was first able to use the sensor to track a human heartbeat in 2010.

This week, the researchers report in the journal Biomedical Optics Express that their tiny sensor -- which consists … Read more

Hot nanotubes blast chemo-resistant cancer cells into oblivion

When it comes to cancer cells, a particularly confounding breed called cancer stem cells have proven difficult to kill. Because they divide so slowly, chemo drugs do them little harm, and they appear resistant to heat therapies that are generally good at killing most cells. Some cancer drugs even appear to promote the growth of cancer stem cells.

Now, three years after they found that the heat from 30-second laser blasts can kill kidney cancer stem cells, researchers at Wake Forest Baptist Medical Center say the same treatment works to kill breast cancer stem cells as well.

Torti's team … Read more

New algorithm speeds up MRI scans

Magnetic resonance imaging scanners produce images of the body using strong magnetic fields and radio waves to scan several images of the same area. By comparing these images, the scanner reveals even the most subtle abnormalities, such as young tumors.

Considering the nature of MRI scanners, it stands to reason that math might improve the time it takes to get and compare these images.

Electrical engineers and computer scientists at MIT's Research Laboratory of Electronics thought so, and they are publishing an algorithm they have devised that speeds scanning time threefold, reducing the amount of time someone would have … Read more

Do cell phones cause brain tumors? Debate rages

A controversial study holds to an earlier claim that mobile phone use does not increase a person's risk of developing a brain tumor.

The study, which was published in the British Medical Journal yesterday, argues that even after using a cell phone for more than a decade, a person's chances of getting a brain tumor are about the same as they would be without cell phone use. The study, which is an update to previous research that found no link between mobile phone use and cancer, examined the instances of brain tumors among long-term cell phone users in … Read more

Tiny oxygen generators improve cancer treatments

Radiation therapy requires oxygen to be effective, which makes cancers that tend to be hypoxic (meaning they are deprived of oxygen)--such as pancreatic and cervical cancers--harder to treat. (Tumors can become hypoxic for a few reasons, e.g. they grow so quickly they actually outgrow blood supply, or cells proliferate so many times that the density taxes the available oxygen.)

So researchers at Purdue have been building and testing tiny devices that can be implanted in tumors and then generate oxygen, thereby making the area far more susceptible to radiation and chemotherapy.… Read more