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Pediatric computed tomographic angiography: imaging the cardiovascular system gently
Jeffrey C Hellinger1, Andres Pena, Michael Poon
1Department of Radiology, The Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA, USA. jeffrey.hellinger@yahoo.com
Insights
Pediatric computed tomographic angiography (CTA) requires careful technique to minimize radiation exposure. This study outlines low-dose and ultra-low-dose CTA methods for safe and effective pediatric imaging.
Area of Science:
- Cardiovascular Imaging
- Pediatric Radiology
- Medical Imaging Techniques
Background:
- Hemodynamic alterations in pediatric patients necessitate timely disease recognition and management.
- Computed tomographic angiography (CTA) offers advantages but requires expertise for safe pediatric application.
- Effective pediatric imaging demands understanding of CTA's benefits, limitations, and appropriate use.
Purpose of the Study:
- To summarize dose reduction methodologies for pediatric CTA.
- To present clinical techniques for achieving low-dose and ultra-low-dose pediatric CTA.
- To discuss technical principles, safe contrast administration, and clinical applications of pediatric CTA.
Main Methods:
- Review of dose reduction CTA methodologies.
- Description of clinical techniques for low-dose and ultra-low-dose pediatric CTA.
- Discussion of CTA technical principles, contrast delivery, and scanner parameters.
Main Results:
- Summary of dose reduction CTA methodologies and clinical techniques.
- Emphasis on low-dose and ultra-low-dose strategies for pediatric CTA.
- Presentation of recommended parameters for multidetector-row CT scanners.
Conclusions:
- CTA can be a valuable tool in pediatric cardiovascular imaging when applied judiciously.
- Low-dose and ultra-low-dose techniques are crucial for safe pediatric CTA.
- Specific protocols and parameters are essential for optimizing pediatric CTA protocols.
Abstract:
Whether congenital or acquired, timely recognition and management of disease is imperative, as hemodynamic alterations in blood flow, tissue perfusion, and cellular oxygenation can have profound effects on organ function, growth and development, and quality of life for the pediatric patient. Ensuring safe computed tomographic angiography (CTA) practice and "gentle" pediatric imaging requires the cardiovascular imager to have sound understanding of CTA advantages, limitations, and appropriate indications as well as strong working knowledge of acquisition principles and image post processing. From this vantage point, CTA can be used as a useful adjunct along with the other modalities. This article presents a summary of dose reduction CTA methodologies along with techniques the authors have employed in clinical practice to achieve low-dose and ultralow-dose exposure in pediatric CTA. CTA technical principles are discussed with an emphasis on the low-dose methodologies and safe contrast medium delivery strategies. Recommended parameters for currently available multidetector-row computed tomography scanners are summarized alongside recommended radiation and contrast medium parameters. In the second part of the article an overview of pediatric CTA clinical applications is presented, illustrating low-dose and ultra-low dose techniques, with an emphasis on the specific protocols.
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