Risk of CT-induced cancer minimal compared to risk of dying from disease

Young patients who undergo chest or abdominopelvic CT are more than 35 times more likely to die of their disease than develop a radiation induced cancer, according to an analysis of 23,359 patients, some of whom were scanned more than 15 times.

The analysis conducted at three hospitals in Boston, found that in the chest CT group, 575 out of 8,133 patients were deceased after a mean follow-up of about 4 years. "That compares to the 12 cases of radiation-induced cancer that would be expected in this group based on the BEIR-VII method, a commonly used model for determining CT-induced ," said Rob Zondervan, one of the authors of the study.

In the abdomino-pelvic CT group, 1,124 out of 15,226 patients were deceased after a mean follow-up of about 3.5 years. "That compares to 23 cases of predicted cancer incidence," said Mr. Zondervan. "Our results indicate that the risk from underlying disease overshadows risk from CT radiation-induced malignancy, even in young adults," he said.

Records of all patients aged 18-35 who underwent a or an abdominopelvic CT from 2003-2007 were included in the analysis.

The data was broken down further based on number of . Patients who had only one or two scans had the most predicted cases of CT-induced (20 out of the 35 predicted cases). "This seeming anomaly arises from the much greater number of young adults who get one or two scans," said Mr. Zondervan. "These results do emphasize that we need to focus our radiation reduction efforts on patients who are very rarely scanned as well as those who are more frequently scanned," he said.

The analysis will be presented at the ARRS Annual Meeting May 1 in Vancouver, Canada.

add to favorites email to friend print save as pdf

Related Stories

Recommended for you

Early hormone therapy may be safe for women's hearts

6 hours ago

(HealthDay)—Healthy women at low risk of cardiovascular disease may be able to take hormone replacement therapy soon after menopause for a short time without harming their hearts, according to a new study.

Low yield for repeat colonoscopy in some patients

7 hours ago

(HealthDay)—Repeat colonoscopies within 10 years are of little benefit to patients who had no polyps found on adequate examination; however, repeat colonoscopies do benefit patients when the baseline examination was compromised, ...

Cell's recycling center implicated in division decisions

10 hours ago

Most cells do not divide unless there is enough oxygen present to support their offspring, but certain cancer cells and other cell types circumvent this rule. Researchers at The Johns Hopkins University have now identified ...

User comments