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The demand for cone-beam computed tomography (CBCT) imaging in clinics, particularly in dentistry, is rapidly increasing. Preoperative surgical planning is crucial to achieving desired treatment outcomes for imaging-guided surgical navigation. However, the lack of surface texture hinders effective communication between clinicians and patients, and the accuracy of superimposing a textured surface onto CBCT volume is limited by dissimilarity and registration based on facial features. To address these issues, this study presents a CBCT imaging system integrated with a monocular camera for reconstructing the texture surface by mapping it onto a 3D surface model created from CBCT images. The proposed method utilizes a geometric calibration tool for accurate mapping of the camera-visible surface with the mosaic texture. Additionally, a novel approach using 3D-2D feature mapping and surface parameterization technology is proposed for texture surface reconstruction. Experimental results, obtained from both real and simulation data, validate the effectiveness of the proposed approach with an error reduction to 0.32 mm and automated generation of integrated images. These findings demonstrate the robustness and high accuracy of our approach, improving the performance of texture mapping in CBCT imaging.
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Objective To compare the difference between self-made retractor and thyroid suspension in laparoscopic thyroidectomy,as well as exploring the feasibility and efficacy of self-made retractor.Methods Fifty nine thyroid patients were included in this study from Jan.2012 to Jun.2013 in our hospital.30 cases of laparoscopic thyroidectomy were completed by the help of self-made retractor while 29 cases were completed with thyroid suspension.The owration time,blood loss,drainage flow,hospital stays and short term effect were compared.Result The average operation time of retractor group (71.57 ± 9.56) min was shorter than the suspension group (79.90 ±10.61) min (P =0.002) The blood loss of retractor group (11.83 ±6.76) mL was less than the suspension group (17.24 ± 9.41) mL (P =0.014).The hospitalization time of retractor group (4.07 ± 0.45) days was similar with the suspension group (4.14 ± 0.52) min (P =0.573),The retractor group had shorter operation time,blood loss.There was statistical significance between them.There was no significance difference of hospital stays and discomfort.Neither group appeared of hoarseness,bucking,angulus oris numbness and other symptom.Conclusion Self-made retractor can reduce the operation time,blood loss.It is worth of clinical extension.
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Operation robot has 3D vision and 7 activity degrees of freedom,also has vibration elimination system and operation scale system.These can ensure its operative precise in limited space.Meanwhile the console meets vito dynamics can relieve fatigue of doctors.Operation robot has great effect in many subjects.But it still needs to be improved because it lacks of feedback system,mechanical failure and software failure.Furthermore,its price demands to decrease.The newest progress was reviewed for better use of operation robot.
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Objective To investigate the damage control surgery(DCS)in the treatment of severe abdominal trauma and the clinical value of learning from experience.Method Forty-severl cases of severe abdominal trauma patients treated with DCS were analyzed retrospectively.Results Forty-one cases (87.23%)were cured,liver abscess after re-operation was 3 cases(6.38%),intestinal fistula,biliary fistula,pancreatic fistula was 1 case(each 2.13%),they were cured by conservative treatment,6 cases(12.77%)were died,the causes of death were nothing to do with the surgery.Conclusion For patients with severe abdominal trauma actively adopt DCS,is safe and effective,with clinical value.
