Radiation risk issues in recurrent imaging

Area of Science:

• Medical Imaging
• Radiology
• Radiation Protection

Background:

• Medical imaging, particularly CT scans and PET/CT, is increasingly prevalent.
• A significant number of patients receive high radiation doses from single or multiple imaging procedures.
• Current cumulative radiation dose tracking across modalities is insufficient.

Purpose of the Study:

• To highlight the growing concern of high cumulative radiation doses in medical imaging.
• To emphasize the need for safer imaging technologies and a re-evaluation of radiation protection principles.
• To address the potential long-term radiation effects in patients with chronic conditions.

Main Methods:

• Analysis of current trends in medical imaging practices and associated radiation doses.
• Review of patient cumulative effective doses from various imaging modalities.
• Assessment of the limitations of existing radiation protection strategies.

Main Results:

• 1 in 125 patients may receive >50 mSv from a single CT exam.
• 3 in 10,000 patients may receive >100 mSv in a single day from CT exams.
• High doses are observed even with justified imaging and optimized techniques.

Conclusions:

• Existing radiation protection measures and benchmarks may be insufficient given current imaging trends.
• There is an urgent need for imaging device manufacturers to develop safer technologies.
• Fundamental principles of radiation protection require critical re-examination due to increasing cumulative patient doses.