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Published on: September 11, 2011
Pediatric craniosynostosis computed tomography: an institutional experience in reducing radiation dose while
Izabella L Barreto1, Ibrahim S Tuna2, Dhanashree A Rajderkar2
1Division of Medical Physics, Department of Radiology, University of Florida, P.O. Box 100374, Gainesville, FL, 32610, USA. Izabella.Barreto@radiology.ufl.edu.
Insights
A new low-dose CT scan protocol significantly lowers radiation exposure for children with craniosynostosis. This advanced imaging technique maintains diagnostic confidence and image quality, improving patient safety.
Area of Science:
- Medical Imaging
- Pediatric Radiology
- Radiation Oncology
Background:
- Children with craniosynostosis often require multiple CT scans, leading to cumulative radiation exposure.
- Minimizing radiation dose in pediatric imaging is crucial for long-term health outcomes.
Purpose of the Study:
- To evaluate a new lower-dose CT protocol for pediatric craniosynostosis.
- Assessed compliance, radiation dose reduction, and clinical image quality of the new protocol.
Main Methods:
- Implemented a modified CT protocol using 100 kV, 5 mAs, and iterative reconstruction for pediatric craniosynostosis.
- Collected radiation dose indices for routine (n=22) and low-dose (n=135) CT protocols.
- Neuroradiologists assessed image quality and diagnostic confidence in a subset of low-dose studies (n=50).
Main Results:
- The low-dose CT protocol demonstrated high compliance.
- Achieved a 98% reduction in CTDIvol and up to a 67-fold reduction in effective dose.
- Radiologists reported high diagnostic confidence and found additional radiation unnecessary.
Conclusions:
- The low-dose CT craniosynostosis protocol substantially reduces radiation exposure in children.
- Image quality and diagnostic confidence were maintained with the reduced radiation dose.
- This protocol offers a safer alternative for pediatric craniosynostosis imaging.
Background:
Children with craniosynostosis may undergo multiple computed tomography (CT) examinations for diagnosis and post-treatment follow-up, resulting in cumulative radiation exposure.
Objective:
To reduce the risks associated with radiation exposure, we evaluated the compliance, radiation dose reduction and clinical image quality of a lower-dose CT protocol for pediatric craniosynostosis implemented at our institution.
Materials And Methods:
The standard of care at our institution was modified to replace pediatric head CT protocols with a lower-dose CT protocol utilizing 100 kV, 5 mAs and iterative reconstruction. Study-ordered, protocol-utilized and radiation-dose indices were collected for studies performed with routine pediatric brain protocols (n=22) and with the lower-dose CT protocol (n=135). Two pediatric neuroradiologists evaluated image quality in a subset (n=50) of the lower-dose CT studies by scoring visualization of cranial structures, confidence of diagnosis and the need for more radiation dose.
Results:
During the 30-month period, the lower-dose CT protocol had high compliance, with 2/137 studies performed with routine brain protocols. With the lower-dose CT protocol, volume CT dose index (CTDIvol) was 1.1 mGy for all patients (0-9 years old) and effective dose ranged from 0.06 to 0.22 mSv, comparable to a 4-view skull radiography examination. CTDIvol was reduced by 98% and effective dose was reduced up to 67-fold. Confidence in diagnosing craniosynostosis was high and more radiation dose was considered unnecessary in all studies (n=50) by both radiologists.
Conclusion:
Replacing the routine pediatric brain CT protocol with a lower-dose CT craniosynostosis protocol substantially reduced radiation exposure without compromising image quality or diagnostic confidence.
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