The virtual coloscopy, also known under the name of colonography of CT, is a process in which a detailed image of the two points is created by a machine of x-ray related to a computer. Although the entrails must be prepared in advance, they are much less invahissantes that the standard coloscopy, which implies usually sedation while a doctor examines the two points by an inserted range and a camera.

However, in note announced on its Web site Tuesday, centers for Health insurance and services of Medicaid (CMS) known as, us have determined that it there has proof insufficient on characteristics of test and execution of colonography of CT of sifting in individuals Insurance-disease-old, and that the obviousness is not sufficient to conclude that to examine the colonography CT improves of the service-disease for asymptomatic, from the recipients of Health insurance of means-risk.

Defenders of the process weren 't happy by the movement. Dr. J. Leonard Lichtenfeld, doctor council of assistant manager for the American Association of cancer, believes that a method moins-invahissante such as the virtual coloscopy could encourage more Americans to obtain examined for the cancer of the colonist, the country 'the second-main thing killer of cancer of S.

Not to say more, I personally, am very disappointed Lichtenfeld wrote on his blog. For me, the exit was reasonably frank -- we lose of almost 50.000 people each year in this country of cancer c�lorectal. We could save thousands of the lives if we could obtain people interviewed for this disease. The American Association of cancer believes that we should support the tests which prevent cancer, and approved the colonography CT like reasonable test for this purpose.

Dr. Abraham Dachman, of the American university of radiology 'of the Committee of cancer of the colonist of S, contributed. I think to him 'sA that bad, of decision Dachman said. I put 't thinks to him 's in the best interests of our country. I find to him 's contrary with the President Obama 'emphase indicated by S on the prevention and to employ new technology to profit from the patients.

Dachman, which is also director of the tomography calculated at the medical centre of University of Chicago, noted that the colonography CT is an effective tool of sifting and that the blue cross and the blue shield currently approve and pay him.

The colonography of CT was examined in patients older and found to be effective, Dachman was added. Thus to base a decision slightly -- if not mainly -- on the fact that the troop, and the effectiveness in this troop, were not studied is the suspect, even for the layman that, it said.

Other doctors agreed with the agency the 'movement of S, but not always for the same reasons.

I put 't am in dissension with the decision of CMS 'of S, but not because it doesn 't visualize lesions in the two points, said Dr. Robert Fletcher, a professor of ambulatory care and prevention at the Medical college of Harvard. evidence which the coloscopy of CT is precise is completely strong. He 's almost as good as the coloscopy and well better as the majority of the other tests.

However, other aspects must also be considered, Fletcher indicated. It noted that if something suspicious turns upwards on the colonography of CT, the doctors must then enter and to study it using the traditional coloscopy and invahissante. In this scenario, the patients would finish duty to the top passing by two modes of entraille-preparation and two difficult expensive, uncomfortable procedures.

In a standard coloscopy, polyps can be removed during the process of range itself, Fletcher specified.

Moreover, there is a concern concerning the amount of radiation potentially harmful receipt by the patient of x-ray, Fletcher noted. The multiple colonographies of CT would mean the multiple amounts of this radiation, it said.

More important, from my point of view, is the results additional-of the colon with the coloscopy of CT. Results that you never started to find, but nevertheless once you see them must continue to evaluate them further, who implies the cost and the risk, it said.

That 's because -- with the difference of the standard coloscopy -- The doesn of coloscopy of CT 't depicts only the two points, but the whole abdomen. It will show cysts and other growths of the liver and kidneys which can lead to the other test in many patients. These tests can often be futile and in any case can be dangerous and are certainly, expensive Fletcher said.

In terms of expenditure, the standard coloscopies can cost up to $3.000, whereas the colonography of CT has a price to pay between $300 to $800.

Another expert was of agreement with Fletcher which perhaps the CMS had acted wisely.

I am satisfied with the decision, Dr. known as Douglas Rex, director of the endoscopy at the hospital of university from Indiana in Indianapolis. Population of Health insurance is not certainly the right population to begin the experiment of coloscopy of CT inside. I was happy that the people with the CMS had courage to make the good decision.

Rex told that older patients have a presence much stronger polyps than, to so much much more patients, if they are interviewed at the beginning with the coloscopy of CT, will need a coloscopy in order to remove polyps.

He also assisted Fletcher 'concern for S which the virtual coloscopy would take too many innofensives aberrations apart from the two points. The majority of the latter are incidental and nonimportant to the patient but result in the tests which increase the cost and the risk with the patients, it said.