Patient history

6 month-old boy admitted to hospital due to sudden multiple episodes of apnea for less than a minute with clicking sounds of the mouth and loss of tonus. The CT exam was performed to exclude intracranial bleeding or anomalies.

Technique

The CT exam of the Head was performed on the Discovery CT750 HD. Patient was scanned in axial mode at 100 kVp. With the use of Auto mA/Smart mA (Noise Index 3.3), we achieved between 114-138 mA. ASiR recontruction wasperformed. Slice thickness was 0.625 mm. DLP of the exam is 181 mGy.cm for a range of 110 mm, resulting in 2 mSv* dose.

Findings

There is no bleeding or other pathology. Ventricles are symmetrical and normal in shape and size.

Conclusion

“As we perform exams on children, one of the reasons why we updated our our CT is our concern for dose. The Discovery CT750 HD allowed us to reduce the dose on Head exams by 20% compared to the already optimized low dose protocols we were using in the past.”

F. Stålhammar, M.D.

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