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Reduced-dose C-arm computed tomography applications at a pediatric institution
Michael Acord1, Sphoorti Shellikeri2, Seth Vatsky2
1Department of Radiology, The Children's Hospital of Philadelphia, 34th Street and Civic Center Boulevard, Philadelphia, PA, 19104, USA. acordm@email.chop.edu.
Pediatric Radiology
|October 7, 2017
Summary
Reduced-dose C-arm computed tomography (CT) techniques preserve pediatric interventional radiology image quality while lowering radiation exposure. This imaging tool aids in complex procedures, especially when standard guidance is insufficient.
Area of Science:
- Medical Imaging
- Pediatric Radiology
- Interventional Radiology
Background:
- Reduced-dose C-arm computed tomography (CT) utilizes flat-panel detectors for real-time 3-D imaging in interventional suites.
- It aids anatomical localization and procedure planning.
Purpose of the Study:
- To detail dose-reduction strategies for C-arm CT in a pediatric setting.
- To offer implementation guidance for these techniques.
Main Methods:
- A 5-year retrospective analysis of procedures using a reduced-dose protocol.
- Protocol details: 5-8s rotation, 248/396 projections, 0.1-0.17 μGy/projection dose, and copper filtration.
- Case categorization by procedure type, patient age, and calculation of C-arm CT and total dose area product (DAP).
Main Results:
- 222 procedures utilized the reduced-dose C-arm CT protocol.
- Common procedures included joint injections (48.6%) and sclerotherapy (34.2%).
- C-arm CT was valuable for challenging percutaneous access cases, contributing 9.9%-80.7% to total DAP.
Conclusions:
- Dose-reduction techniques maintain interventional image quality while minimizing pediatric radiation exposure.
- C-arm CT is a versatile adjunctive tool in pediatric interventional radiology.
- It is particularly beneficial for procedures with difficult percutaneous access beyond standard guidance.
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