Patient dose considerations in computed tomography examinations

Area of Science:

• Medical Physics
• Radiology
• Radiation Biology

Background:

• Ionizing radiation is vital in medicine for diagnosis and therapy but carries risks, including tissue damage and carcinogenesis.
• Computed tomography (CT) significantly contributes to population radiation dose due to high examination doses and frequent patient scans.
• Advancements in CT technology have expanded its clinical use and availability, making it a routine procedure with increased patient exposure.

Purpose of the Study:

• To summarize the detrimental effects of ionizing radiation.
• To provide background information on CT dosimetry.
• To detail the evolution and current technology of CT scanners concerning patient doses.

Main Methods:

• Review of ionizing radiation effects.
• Summary of CT dosimetry principles.
• Detailed overview of modern multislice CT scanner technology and features impacting patient dose.

Main Results:

• Modern CT scanners enable rapid, whole-body scanning with high-quality 2D and 3D image reconstruction.
• CT examinations contribute significantly to collective population radiation dose.
• Awareness of radiation risks and justification for CT scans are essential for medical professionals.

Conclusions:

• Medical professionals must be aware of the risks associated with ionizing radiation from CT scans.
• Radiologists play a key role in justifying CT examinations to balance diagnostic benefits against radiation risks.
• Understanding CT dosimetry and technology is critical for minimizing potential harm from radiation exposure.