New York, June 25 (IANS): There is new hope for heavy boozers who want to quit drinking. A 'virtual-reality' therapy may help people with alcohol-dependence reduce the craving for their favourite tipple, says a new study.

The researchers said they are optimistic about the potential for virtual reality as a therapy for alcohol-use disorders.

"This technology is already popular in the fields of psychology and psychiatry," said senior researcher Doug Hyun Han from Chung-Ang University Hospital in Seoul, Korea.

"Virtual-reality therapy has been used to treat phobias and posttraumatic stress disorder," Han said.

The idea is to expose people to situations that trigger fear and anxiety, in a safe and controlled space. Then, hopefully, they learn to better manage those situations in real life.

According to Han, less is known about whether virtual reality can help with substance use disorders. But there has been some evidence that it can reduce people's craving for tobacco and alcohol.

For the new study, his team recruited 12 patients being treated for alcohol dependence. All went through a week-long detox programme, then had 10 sessions of virtual-reality therapy -- done twice a week for five weeks.

The sessions involved three different virtual scenes -- one in a relaxing environment; another in a 'high-risk' situation in which the patients were in a restaurant where other people were drinking; and a third, 'aversive', situation.

In that aversion scene, patients were surrounded by the sights, sounds and smells of people getting sick from too much alcohol.

Before they began the programme, all of the patients underwent positron emission tomography (PET) and computerised tomography (CT) brain scans, which allowed the researchers to study the patients' brain metabolism.

It turned out that, compared with a group of healthy people, the alcohol-dependent patients had a faster metabolism in the brain's limbic circuit -- which indicates a heightened sensitivity to stimuli like alcohol.

After the virtual-reality therapy, however, the picture changed. Patients' revved-up brain metabolism had slowed -- which, Han said, suggests a dampened craving for alcohol.

According to Han, the therapy is a promising approach to treating alcohol dependence and that is partly because it puts patients in situations similar to real life and requires their active participation.

The findings were published in the Journal of Studies on Alcohol and Drugs.