The ambulatory EEG recorder designed in this paper can continuously record 24-hour EEG signals on 18 channels. C8051F020, a kind of mixed-signal ISP FLASH MCU, controls all the functions such as sampling, storage and many others. The 12-bit ADC in C8051F020 samples the EEG signal amplified by the preamplifier. At the same time, the EEG signal of every channel can be selected through the keyboard to be displayed on LCD so that the working status can be detected. After the system is ready, the signals sampled during 24 hours are stored into the CompactFlash card as FAT16 files.

The precision of optical positioning system is one of the most important factors which affects the precision of navigation guided surgery. In this study, an efficient and low-cost tool and its algorithm were proposed to evaluate the accuracy of optical positioning system based on the ablation scenario of liver cancer, and two validation experiments were designed. Experimental results show that the tool and its algorithm can evaluate the accuracy of the current positioning system accurately and efficiently.
Algorithms ; Humans ; Liver Neoplasms/surgery* ; Optical Devices ; Surgery, Computer-Assisted/methods*

The medical metaverse is a combination of medicine and other cutting-edge technologies such as computer and information ones. In the medical metaverse, medical knowledge in the real world will be transformed into a digital form, so that activities concerning diagnosis, treatment, education and clinical practice can be carried out in a virtual environment. Based on the latest research advances at home and abroad, this review expounds on the medical metaverse from the aspects of supporting technologies, applications in clinic and medical education, current deficiencies and future development.

In neurosurgery, skull repair caused by surgical approach is one of the important research contents. In this paper, a rapid reconstruction method of the skull defect with optical navigation system is proposed. This method can automatically reconstruct the structure of skull defect with the intraoperative defect edge points and preoperative medical image data. The head model experiment was used to evaluate the effect of the method, the average error of the reconstruction of the defect in the right orbit was 0.424 mm, while the average error of the reconstruction of the defect in the posterior skull base was 0.377 mm. The experimental results show that the structure of the defect is consistent with the actual defect, and the reconstruction accuracy satisfies the clinical requirements in neurosurgery.
Craniotomy ; Surgery, Computer-Assisted

Vascular interventional surgery is an important means to treat cardiovascular and cerebrovascular diseases, but the particularity of its working environment will bring greater radiation threat to doctors. Vascular interventional surgery robots can effectively improve the working environment of doctors and can provide more stable operations, improve the success rate of surgery. This study mainly introduces the current research status, key technologies, and future application of vascular interventional surgical robots.
Robotics ; Vascular Surgical Procedures/methods* ; Heart ; Technology

Robotic puncture system has been widely used in modern minimally invasive surgery, which usually uses hand-eye calibration to calculate the spatial relationship between the robot and the optical tracking system. However, the hand-eye calibration process is time-consuming and sensitive to environmental changes, which makes it difficult to guarantee the puncture accuracy of the robot. This study proposes an uncalibrated positioning method for puncture robot based on optical navigation. The method divides the target path positioning into two stages, angle positioning and position positioning, and designs angle image features and position image features respectively. The corresponding image Jacobian matrix is constructed based on the image features and updated by online estimation with a cubature Kalman filter to drive the robot to perform target path localization. The target path positioning results show that the method is more accurate than the traditional hand-eye calibration method and saves significant preoperative preparation time by eliminating the need for calibration.
Robotics ; Robotic Surgical Procedures ; Calibration ; Minimally Invasive Surgical Procedures ; Optical Devices

This paper designed an automatic robotic puncture system for accurate liver cancer ablation based on optical surgical navigation. The near-infrared optical surgical navigation system we constructed for liver ablation was applied to carry out surgical planning and simulation, the near-infrared cameras dynamically tracked the current position of puncture needle relative to the location of the patient's anatomy, then guided the surgery robot to position precisely in three-dimensional space and performed the surgery.
Humans ; Liver Neoplasms ; surgery ; Needles ; Punctures ; Robotic Surgical Procedures ; Surgery, Computer-Assisted