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Penelitian tentang efektivitas herbal dan terapi alternatif untuk kanker
1. How Safe or Unsafe Are Medical Imaging Procedures?
Radiation exposure is a known risk factor for cancer. Although the radiation exposure from a single test is minimal often patients undergo repeated or multiple times of CT / PRT scan. This increases their cumulative exposure to potentially cancer-causing radiation.
2. Study Finds Radiation Risk for Patients
At least four million Americans under age 65 are exposed to high doses of radiation each year from medical imaging tests. About 400,000 of those patients receive very high doses, more than the maximum annual exposure allowed.
Dr. Rita Redberg, a cardiologist and researcher at the University of California, San Francisco, who has extensively studied the use of medical imaging, said it would probably result in tens of thousands of additional cancers. It’s certain that there are increased rates of cancer at low levels of radiation, and as you increase the levels of radiation, you increase cancer.
Dr. Reza Fazel, a cardiologist at Emory University, said “These procedures have a cost, not just in terms of dollars, but in terms of radiation risk.”
3. How Much Radiation Does A Person Get From Medical Imaging Studies?
Moreover, doctors may prescribe scans that aren’t medically justified. And since risk from radiation exposure accumulates over a lifetime, certain scans may not be appropriate for people who’ve already had a lot of scans.
4. Which types of diagnostic imaging procedures use radiation?
X rays pass through the body to form pictures on film or on a computer or television monitor, which are viewed by a radiologist. If you have an x-ray test, it will be performed with a standard x-ray machine or with a more sophisticated x-ray machine called a CT or CAT scan machine.
In nuclear medicine procedures, a very small amount of radioactive material is inhaled, injected, or swallowed by the patient. If you have a nuclear medicine exam, a special camera will be used to detect energy given off by the radioactive material in your body and form a picture of your organs and their function on a computer monitor. A nuclear medicine physician views these pictures. The radioactive material typically disappears from your body within a few hours or days.
Do magnetic resonance imaging (MRI) and ultrasound use radiation?
MRI and ultrasound procedures do not use ionizing radiation. If you have either of these types of studies, you are not exposed to radiation.
5. The Downside of Diagnostic Imaging
6. Doctors Order More Tests when They Benefit Financially: Ask If You Really Need that Test
Researchers from the Institute for Technology Assessment at the Massachusetts General Hospital Department of Radiology found that there was no mistaking that diagnostic imaging tests were being ordered far more than they deemed necessary. The question that begs to be answered is, “why?”
Many doctors referred their patients to imaging centers that were affiliated with their practice, or were even done by the doctor’s own staff. When a physician has such a close relationship with the provider conducting the imaging study, there is the possibility that the physician will benefit financially from ordering additional imaging studies.