Sunday, April 22, 2012

Family Medicine Activist: More Patient Radiation Safety

Just in case you didn't read the article (Cancer Risks from Diagnostic Imaging Procedures) in my last post about Radiation Safety, here's a table from it noting how much radiation in "chest X-Ray equivalents" you might be exposed to with the imaging studies listed below:

Table 4. Typical Effective Doses From Some Medical Imaging Examinations
  • mSv indicates millisieverts; AP, anteroposterior; PA, posteroanterior; CT, computed tomography.
  • a
    Number in the third column indicates the equivalent number of chest x-rays for that procedure.
  • b
    Effective dose was calculated using the mean glandular dose found in the Mammography Quality Standards Act (MQSA) inspection in 2006 in the United States.54
  • c
    Average effective dose, health care level I countries, United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) report 2000.13
  • d
    Effective dose was calculated using entrance surface dose, nationwide survey (2001-2006, United Kingdom), and effective dose conversion factor.5253
  • e
    Average effective doses for axial and helical scans from a nationwide survey between 2000 and 2001 in the United States.55

    We see many people who get the abdomen/pelvis CT for lower abdomenal pain.  People who get kidney stones seem to get a CT of the abdomen each time they go to an ER.  People with head or neck pain seem to get the "trauma series" if they go to an ER after a motor vehicle accident.  That includes CT of the brain, CT of the neck and CT of the low back.  I say WOW.  What do you think?
 Skull AP or PA0.0151
 Chest PA0.0131
 L-spine AP0.4430
 Abdomen AP0.4635
 Pelvis AP0.4835
Mammography (4 views)b
Dental radiographyc
Diagnostic fluoroscopy procedures
 Barium swallowd170
 Barium enemad5350
 Angiography: cardiacc7500

No comments:

Post a Comment