نتایج جستجو برای: ct images
تعداد نتایج: 379938 فیلتر نتایج به سال:
Positron Emission Tomography (PET) and Computed (CT) are two modalities widely used in medical image analysis. Accurately detecting segmenting lymphomas from these imaging critical tasks for cancer staging radiotherapy planning. However, this task is still challenging due to the complexity of PET/CT images, computation cost process 3D data. In paper, a segmentation method based on belief functi...
The images of dental CBCT imaging systems used in conic shaped beams, stored in the DICOM format, have various applications in the dentistry, including bone density estimation to select the location of the orthodontic implant, bone loss detection and etc. In these systems, unlike CT imaging systems, the resulting images exhibit gray-scale non-uniformity in each of the different axis in FOV. Thi...
BACKGROUND Attenuation correction of a single photon emission computed tomography (SPECT) image is possible using computed tomography (CT)-based attenuation maps with hybrid SPECT/CT. CT attenuation maps acquired during breath holding can be misaligned with SPECT, generating artifacts in the reconstructed images. The purpose of this study was to investigate the effects of respiratory phase duri...
Introduction: One of the main steps in the optimization process in diagnostic imaging is the quality control of radiology devices. The usual method of CT scan calibration is used of a phantom. The phantom created a certain weakening for the radiation through which it passes. One of the most suitable methods for quantitative analysis of the resolution and contrast in CT scan im...
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