Related Experiment Video
Updated: Jan 25, 2026
11:28
Robotic-Guided Stereoelectroencephalography for Invasive Epilepsy Monitoring
Published on: June 13, 2025
1.3K
Approach Angle Affects Accuracy in Robotic Stereoelectroencephalography Lead Placement.
Jordan C Iordanou1, Divaldo Camara1, Saadi Ghatan1
1Department of Neurosurgery, Mount Sinai West, New York, New York, USA.
World Neurosurgery
|April 28, 2019
Summary
Planning robotic epilepsy surgery trajectories with high skew angles (>30°) increases placement error. Surgeons should minimize steep angles or use larger safety margins for accurate electrode placement in stereoelectroencephalography.
Area of Science:
- Neurosurgery
- Robotic Surgery
- Epilepsy Research
Background:
- Epilepsy affects many patients unresponsive to medication, necessitating advanced surgical options.
- Stereoelectroencephalography (SEEG) with depth electrodes is crucial for mapping epileptogenic networks.
- Robotic systems like ROSA offer improved efficiency and comparable accuracy in electrode placement compared to traditional methods.
Purpose of the Study:
- To investigate the impact of planned trajectory angle on the accuracy of robotic-assisted SEEG electrode placement.
- To identify factors influencing electrode deviation during stereotactic neurosurgery.
Main Methods:
- Analysis of 319 SEEG trajectories from 25 patients using ROSA robotic system.
- Computation of skew angle and accuracy using fused preoperative/postoperative CT scans and planned trajectories.
- Comparison of placement accuracy between oblique (>30°) and orthogonal (<30°) trajectory angles.
Main Results:
- Oblique trajectories (>30° skew angle) showed significantly higher radial error (2.05 mm) compared to orthogonal trajectories (<30° skew angle; 1.45 mm).
- The difference in radial error was statistically significant (P < 0.001).
Conclusions:
- ROSA robotic system enhances speed and efficiency in stereotactic neurosurgery.
- Minimizing high skew angles in trajectory planning is critical for accurate electrode placement.
- When high skew angles are unavoidable, increased safety margins are recommended to mitigate placement errors.
Related Concept Videos
03:37Uncertainty in Measurement: Accuracy and Precision
100.5K
Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value.
100.5K
02:07Improving Translational Accuracy
14.1K
Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...
14.1K
02:07Improving Translational Accuracy
3.6K
3.6K
01:52Accuracy and Precision
14.8K
Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value. Highly accurate...
14.8K
01:13Contact Angle
18.3K
When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces.
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
18.3K
01:28Accuracy, limits, and approximation
1.1K
Accuracy, limits, and approximations are common in many fields, especially in engineering calculations. These concepts are imperative for ensuring that a given value is as close as possible to its true value.
Accuracy is defined as the closeness of the measured value to the true or actual value. In engineering mechanics, repeated measurements are taken during theoretical or experimental analyses to ensure that the result is precise and accurate.
The accuracy of any solution is based on the...
Accuracy is defined as the closeness of the measured value to the true or actual value. In engineering mechanics, repeated measurements are taken during theoretical or experimental analyses to ensure that the result is precise and accurate.
The accuracy of any solution is based on the...
1.1K