Pediatric multidetector computed tomography using tube current modulation and a patient image gallery.

Area of Science:

• Medical Imaging
• Radiology
• Pediatric Imaging

Background:

• Radiation dose reduction is critical in pediatric multidetector computed tomography (MDCT).
• Optimizing radiation exposure while maintaining diagnostic image quality is a key challenge in pediatric imaging.

Purpose of the Study:

• To implement and evaluate pediatric 16-slice MDCT protocols using tube current modulation and an image gallery (IG) for simulated dose reduction.
• To prospectively adjust tube current based on simulated protocols from the IG.
• To compare the image quality of the IG with actual clinical MDCT scans.

Main Methods:

• Thirty pediatric MDCT examinations (thorax, abdomen, pelvis) were performed on a 16-slice scanner using an IG and online tube current modulation (CARE Dose).
• Image quality was assessed both visually by three radiologists and objectively by measuring image noise.
• Concordance between IG and clinical scans was analyzed statistically.

Main Results:

• Moderate concordance was observed between the IG and clinical MDCT scans for both objective and subjective image quality assessments.
• Dose reductions varied by region and weight group, with moderate to considerable reductions in abdominal/pelvic scans.
• Additional dose reduction, ranging from 8.6% to 23.9%, was achieved using CARE Dose.

Conclusions:

• The image gallery (IG) effectively enabled prospective tube current reduction and adaptation of image quality to clinical needs in pediatric MDCT.
• CARE Dose further contributed to radiation dose reduction.
• The image quality of clinical MDCT scans was comparable to the simulated images from the IG, supporting its utility in dose optimization.