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Tracking radiology’s risks

         alling friends, checking email
         and playing games are par for
         the course for iPhone users.
    But few likely expect their iPhone to
calculate cancer risks from medical
exams such as computed tomography
(CT) scans.
    That’s exactly what a fourth-year
radiology resident at the University of
                                              Reuters / Jean-Paul Pelissier

Toronto in Toronto, Ontario, hopes
iPhone and iTouch users will do, using a
$2.99 application launched in May that
uses available research to estimate
patients’ cumulative radiation doses as a
result of medical exams and then calcu-
lates the associated cancer risk.                                              A radiologist studies an image from a magnetic resonance imaging scanner.
    “The point of the application is to
simply raise awareness among both
patients and physicians about radiation                                       backed by several prominent medical           tests based on the patient’s condition.
risk associated with various radiology                                        bodies, including the American College        It would differ from Radiation Passport
and radiology-related exams,” says Dr.                                        of Radiology and the Canadian Associ-         in that it would be a centralized system
Mark Otto Baerlocher, who designed                                            ation of Radiologists, also emerged,          that offers recommendations along with
the application with his brother Adrian                                       advocating the need to reduce radiation       the advice of a medical worker.
Baerlocher, a computer programmer.                                            doses on children, among other issues.            Dr. Ted Lyons, president of the Cana-
    The Radiation Passport program                                               Although supportive of efforts to          dian Association of Radiologists, says a
allows users to enter exam histories,                                         increase awareness, some are concerned        program such as Radiation Passport risks
medical instructions and appointments.                                        that tools such as Radiation Passport         generalizing cancer risks while confusing
It is similar in principle to a website                                       may not help patients understand the          patients and doctors alike. “Bottom line
operated by a group of radiology resi-                                        balance between the risks and benefits.       is, 1 abdominal CT scan is equal to 500
dents in the United States (www                                                  “Is it fair for patients to have that      chest x-rays [in terms of radiation dose],”                                                               information and be responsible for pro-       he says. “If you need the test, the CT scan
    Calculating the cumulative dose is a                                      cessing it?” asks Dr. Donald Frush, chair     should be done. But in patients who need
difficult task, given the many and some-  
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