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May 4, 2011

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Mummy aids kids' death probes

A childhood fascination with archeology and a chance encounter with a 2,700-year-old Egyptian mummy are helping doctors in the US state of Vermont and law enforcement officials find truth in some of the most challenging of modern-day crimes: the unexplained deaths of young children.

After spotting the mummy at the University of Vermont's Robert Hull Fleming Museum in Burlington, Dr Jason Johnson, a radiology resident, arranged to have it put through his hospital's state-of-the-art CT scanner. He wanted to know about the life of what is believed to be the remains of an Egyptian servant girl of about 14 - and what led to her death.

What Johnson didn't expect was that some of the scientific techniques used to reveal the mummy's secrets would have other applications, including helping Vermont's medical examiner and prosecutors determine if children who die in infancy are the victims of crimes.

The hospital's CT scans helped doctors create a full-size, three-dimensional model of the mummy's skull - thanks to the latest technology and the sharp detail obtained by cranking up the power on the scanner to levels unsafe for living patients. That also helps in forensics by revealing patterns of injury in modern infant death cases that other scan techniques might miss.

"It made me feel good I came up with the protocol to work on the mummy," says Johnson, 31, a fifth-year radiology resident at Fletcher Allen Health Care, the teaching hospital at the University of Vermont. "I never sat up at night thinking, 'How can I save children from abuse'?"

Since the mummy was scanned in November, physicians working with the Vermont medical examiner's office have started using the techniques on infant deaths, which average about one a month.

"It was tremendously helpful," says Washington County State's Attorney Tom Kelly, who used the information gleaned from a CT in a recent case to help determine the age of the bone breaks in a young abuse victim. The case, completed before the mummy technique was developed, has not been discussed in open court so he couldn't give further details.

Johnson says that just as important as helping officials learn if a crime has been committed, the new techniques can help prove an infant's death was natural.

"It's not always pattern of injuries that we find suggesting somebody did something wrong," Johnson says. "There could be findings that nothing wrong happened or the story fits. It's in the interest of truth."

Medical examiners across the US are turning more to CT scanners to complement traditional autopsies and X-rays, says Dr Mary Ann Sens, the president of the National Association of Medical Examiners and chair of the pathology department at the University of North Dakota's medical school.

"This got really wide acceptance in the United States in the last five to 10 years based on the work done at the Dover facility by the armed forces medical examiner," she says of the state of Delaware location where the remains of all deceased service members are processed after being brought back from overseas.

And now it's being expanded to deceased children.

In North Dakota, Sens says, "We are just now starting to request that on infants, children under 5, a CT scan be done.

It really does assist a great deal. It also allows a 3D reconstruction so you can actually take off layers of the skin and graphically show where wounds are."

Vermont's chief medical examiner, Dr Steven Shapiro, says he's been doing full-body CT scans of infants for two or three years. The new techniques developed for the mummy scan are just improving the process.

"Since the person is not living, you don't care about the radiation dose," says Fletcher Allen radiologist Dr Christopher Filippi, who helped scan the mummy and develop the new techniques.

He hopes to present a paper on the techniques at the fall meeting of the Radiological Society of North America. "Normally, in clinical scanning you have to worry about the patient. If the person is deceased or a mummy, you can take your time and get exquisite detail."

New CT technology is almost 1,000 times faster than 20 years ago, which also helps improve the ability to produce three-dimensional images, such as those used to create the model of the mummy's skull, says Dr George Ebert, the chief of imaging technology at the Radiology Department at Fletcher Allen.

The Fleming Museum acquired the mummy in 1910 after George Perkins, the university's first curator of collections, bought it at a market in Cairo. The mummy is believed to be about 2,700 years old and to have come from the Nile Valley, about 350 miles south of Cairo, museum officials say.

Since shortly after arriving in Burlington a century ago, the mummy has been displayed at the Fleming, just downhill from the medical complex now known as Fletcher Allen. It's still one of the museum's most popular attractions.

It was in the Fleming that Johnson first saw the mummy in the fall of 2009 when he was there to see a different exhibit. Johnson grew up in Arizona, where one of his primary school teachers helped instill in him a fascination with Egyptology.

So he checked into the history of the Vermont mummy. It was X-rayed in 1937, but the relatively crude imagery available 74 years ago did little to tell the physicians who examined her much about her past.


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