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Image distortion in US-guided liver tumor puncture with curved linear array
Kei Konno1, Hideaki Ishida, Tomoya Komatsuda
1First Department of Internal Medicine, Akita University School of Medicine, 1-1-1 Hondo, Akita City, Akita 010-8543, Japan. kkei@med.akita-u.ac.jp
European Radiology
|May 24, 2003
Summary
Needle deviation during ultrasound-guided liver puncture is influenced by probe size and puncture angle. Optimizing these factors can minimize display errors and prevent complications.
Area of Science:
- Medical Imaging
- Interventional Radiology
- Biomedical Engineering
Background:
- Ultrasound (US)-guided liver interventions are common.
- Accurate needle placement is crucial for effective treatment.
- Needle deviation during puncture can lead to complications.
Purpose of the Study:
- To systematically evaluate factors affecting needle deviation during US-guided liver puncture.
- To analyze the impact of probe geometry, puncture route, and abdominal wall properties on needle display error.
Main Methods:
- A simplified simulation model of needle insertion into liver tumors was developed.
- Microcomputer system used to visualize needle distortion.
- Variables manipulated included abdominal wall thickness/composition, probe radius, puncture site, and angle.
Main Results:
- Needle displacement errors ranged from -10.9 to 3.8 mm.
- Larger probe radius reduced displacement error.
- Error was less pronounced with central punctures compared to side attachments.
- Puncture angle and abdominal wall properties also influenced deviation.
Conclusions:
- Probe radius and puncture angle are key factors in minimizing needle deviation during US-guided liver procedures.
- Recommendations for optimal probe selection and puncture technique are provided based on tumor location.
- Awareness of potential display errors is essential for preventing hazardous complications.