长沙U币交易选择|【唯一TG:@heimifeng8】|Telegram账号盗取破解技术✨谷歌搜索留痕排名,史上最强SEO技术,20年谷歌SEO经验大佬✨CT scans contribute to U.S. cancer burden : Shots

CT scans diagnose afflictions from tumors to kidney stones to life-threatening diseases and injuries, such as aneurysms and blood clots leading to stroke.

But the radiation emitted by this essential diagnostic tool may cause more harm than previously known and could eventually be responsible for roughly 5% of all cancers diagnosed in the U.S. in a single year, a new study finds.

"Medical imaging has potential benefits," said radiologist Dr. Rebecca Smith-Bindman, an epidemiology professor at the University of California, San Francisco, and lead author of the study published Monday in JAMA Internal Medicine. "It has potential harms as well, and it's really important to balance them."

Shots - Health News

Mammograms have pros and cons. Women can handle the nuance, study argues

Scientists long ago established that ionizing radiation emitted by computed tomography, or CT, scans increases cancer risk. But, since 2007, use of the imaging technique has surged 35%, the study says, due in part to growth in what Smith-Bindman and her colleagues call "low-value, potentially unnecessary imaging."

Their new research, based on projections from hospitals in 20 U.S. states, estimates that 103,000 cancer diagnoses, or 5% of all cancers, could result from 93 million scans performed in the U.S. in 2025 alone.

"There's nothing you can do about radiation that you've been exposed to already. But you want to limit future exposure to cases when you really need it," Smith-Bindman said.

Some scans might add no diagnostic value, she said. Moreover, the amount of radiation a scan emits fluctuates widely and can be far higher than necessary with the operator, not the machine, making the difference, she said. The dose at one scanning facility can be 50 times stronger than at another.

Dr. Dana Smetherman, chief executive officer of the American College of Radiologists, praised the study for bringing awareness to the question of radiation risk. Some people are unaware, for example, that ultrasounds and MRIs do not emit radiation and that CT scans do, she said.