Adult ; Antigens, CD ; metabolism ; Antigens, Differentiation, Myelomonocytic ; metabolism ; Appendectomy ; Appendiceal Neoplasms ; complications ; metabolism ; pathology ; surgery ; Appendicitis ; etiology ; surgery ; Diagnosis, Differential ; Female ; Granular Cell Tumor ; complications ; metabolism ; pathology ; surgery ; Humans ; Paraganglioma ; metabolism ; pathology ; Phosphopyruvate Hydratase ; metabolism ; S100 Proteins ; metabolism

Limited by the imaging principle of whole body bone SPECT image, the gray value of bladder area is quite high, which affects the image's brightness, contrast and readability. In the meantime, the similarity between bladder area and focus makes it difficult for some images to be segmented automatically. In this paper, an improved Snake model, GVF Snake, is adopted to automatically segment bladder area, preparing for further processing of whole body bone SPECT images.
Algorithms ; Bone and Bones ; diagnostic imaging ; Humans ; Image Processing, Computer-Assisted ; Models, Anatomic ; Tomography, Emission-Computed, Single-Photon ; methods ; Urinary Bladder

Based on the characteristic of the PET-CT multimodal image series, a novel image registration and fusion method is proposed, in which the cubic spline interpolation method is applied to realize the interpolation of PET-CT image series, then registration is carried out by using mutual information algorithm and finally the improved principal component analysis method is used for the fusion of PET-CT multimodal images to enhance the visual effect of PET image, thus satisfied registration and fusion results are obtained. The cubic spline interpolation method is used for reconstruction to restore the missed information between image slices, which can compensate for the shortage of previous registration methods, improve the accuracy of the registration, and make the fused multimodal images more similar to the real image. Finally, the cubic spline interpolation method has been successfully applied in developing 3D-CRT (3D Conformal Radiation Therapy) system.
Algorithms ; Artificial Intelligence ; Diagnostic Imaging ; methods ; Humans ; Image Enhancement ; instrumentation ; methods ; Image Interpretation, Computer-Assisted ; instrumentation ; methods ; Imaging, Three-Dimensional ; instrumentation ; methods ; Pattern Recognition, Automated ; methods ; Positron-Emission Tomography ; instrumentation ; methods ; Radiotherapy Planning, Computer-Assisted ; instrumentation ; methods ; Tomography, X-Ray Computed ; instrumentation ; methods

In this paper, BP neural network is used to segment whole body bone SPECT image so that the lesion area can be recognized automatically. For the uncertain characteristics of SPECT images, it is hard to achieve good segmentation result if only the BP neural network is employed. Therefore, the segmentation process is divided into three steps: first, the optimal gray threshold segmentation method is employed for preprocessing, then BP neural network is used to roughly identify the lesions, and finally template match method and symmetry-removing program are adopted to delete the wrongly recognized areas.
Algorithms ; Bone and Bones ; diagnostic imaging ; Humans ; Image Interpretation, Computer-Assisted ; methods ; Neural Networks (Computer) ; Pattern Recognition, Automated ; methods ; Tomography, Emission-Computed, Single-Photon ; Whole Body Imaging

Objective:To investigate the effect of posture training on head posture in myogenic temporomandibular disor-ders(TMD)patients with forward head posture. Method:Forty-five myogenic TMD patients(6 male,39 female;age 29.24±6.13y)were recruited from the outpatient rehabilitation clinics of the Ninth People's Hospital of Shanghai Jiaotong University School of Medi-cine from January 2019 to February 2021.Under the design of a prospective controlled study,all patients were randomly divided into the posture training group(23 cases)and the control group(22 cases).The pos-ture training group received posture training for 3 weeks with 30 minutes each time;the control group only re-ceived health education.The patients in two groups received outpatient follow-up after 3 weeks.The maximum mouth opening(MMO)and pain intensity were measured before and after treatment,and the head rotation and craniovertebral angle were measured using the sagittal photograph. Result:The craniovertebral angle of the posture training group(n=22)after treatment were signifiicantly higher than the control group(n=20)(55.3°±2.3° vs 48.4°±4.4°,P＜0.001).The pain score in the posture training group was significantly lower than that in the control group(1.9±0.7 vs 2.9±0.8,P＜0.001).There were no sig-nificant group differences between the improvement of head rotation angle and MMO(P=0.437,P=0.313). Conclusion:Posture training can improve the head posture of myogenic and symptoms in TMD patients.