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Computed Tomography

Computed Tomography

Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...

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Laser-guided computed tomography puncture system: simulation experiments using artificial phantom lesions and

Norihisa Nitta¹, Masashi Takahashi, Toyohiko Tanaka

¹Department of Radiology, Shiga University of Medical Science, Seta Tsukinowa-cho, Otsu, 520-2192, Japan. r34nitta@belle.shiga-med.ac.jp

Radiation Medicine

|May 22, 2007

Summary

A new laser guiding puncture system enhances computed tomography (CT)-guided procedures. This system allows for safe and accurate CT-guided punctures, as demonstrated in simulation and patient studies.

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Area of Science:

Medical Imaging
Interventional Radiology
Surgical Technology

Background:

Computed tomography (CT)-guided punctures are crucial for various medical procedures.
Ensuring accuracy and safety in CT-guided interventions remains a key challenge.
Existing methods may have limitations in precision and ease of use.

Purpose of the Study:

To develop and evaluate a novel laser guiding puncture system for use with commercially available CT scanners.
To assess the accuracy and safety of the developed system in simulated and clinical settings.

Main Methods:

A laser-guided CT puncture system was constructed on a CT table using an aluminum frame.
Preliminary simulation tests were performed using body and nodular lesion models.
The system was utilized for puncture procedures in 15 patients, including lung biopsies and percutaneous vertebroplasty (PVP).

Main Results:

Simulation experiments showed minimal deviation from the target center (2.95 +/- 1.20 mm and 3.52 +/- 1.12 mm).
No significant differences were observed between operators or angles in simulations.
Clinical application in lung biopsies resulted in a 0-8 mm distance from the planned to actual puncture point.
Percutaneous vertebroplasty procedures in 10 patients showed a 0-5 mm distance from the planned to actual puncture point.

Conclusions:

The newly developed laser guiding puncture system demonstrates potential for safe and accurate CT-guided interventions.
The system offers a promising tool for improving precision in percutaneous procedures.
Further validation may confirm its utility in a broader range of CT-guided interventions.