As a gold standard, CBCT reconstruction using projection images big enough to encompass the target were also performed for full scan (360-degree gantry rotation). Results: Incomplete reconstruction with artifacts was observed for reconstruction using projections from the central imager position only. ...
Many methods for correcting CBCT images with high quality have been proposed to produce quantitative CBCTs in the radiation therapy field, which do not require a calibration phantom during an object scan. These methods can be classified as hardware corrections such as anti-scatter grids, and model...
The time needed for a full scan is typically under one minute and the radiation dosage is up to a hundred times less than that of a regular CT scanner.Figure Picture of Smart CBCTSince the COVID-19 virus outbreak in December 2019, the disease has spread to almost 100 countries around ...
Once the CBCT scan has been performed, it is important to review any potential pathology within the field-of-view of the maxillomandibular region. From a medical/legal standpoint, extragnathic areas outside the implant areas should also be inspected for pathology.5A cross-s...
In this study, a total of three VoxelMorph network variants were investigated: original VoxelMorph using either the anatomical or label images as inputs (VoxelMorph using Scans [VMorph_Sc] and VoxelMorph using Masks [VMorph_Msk]) and VoxelMorph with both scan and label images (4 inputs, Voxel...
Full size image PTV margin Table 3 shows the SDs of systematic (∑) and random (σ) errors. One patient had one 4DCT scan at tumor CT simulation, and therefore the random errors were zero for tumor centroid and boundary displacement. Based on the SDs of set-up systematic and random erro...
spinal cord was 22.1, 6.7, 32.4 mGy absorbed dose, respectively. Under the condition of the same scan, differences between different organ dose. Were found. Conclusion : to carry out the image-guided radiation therapy, it should be consider the extra dose to the human body form image eq...
(LII),fiber-optictapercoupledprogressivescan,frame-transfer,charged-coupleddevice(CCD)camerawhichprovidesreal-time12bit,1k1kimagescapablegreaterthan10lp/mmresolution.Imagescantriggeredmode,cameracancomputerusingCameraLinkserialcommunication.graphicaluserinterfacecameramodespixelbinningacquire,store,display,program,...
CBCT is the most common 3D radiographic examination in dentistry and offers generally reduced radiation exposure and faster acquisition time than a conventional CT scan, at the expense of image quality7. Another shortcoming is the usage of grayscale values, instead of the standardized grey values (...
The time needed for a full scan is typically under one minute and the radiation dosage is up to a hundred times less than that of a regular CT scanner.Figure Picture of Smart CBCTSince the COVID-19 virus outbreak in December 2019, the disease has spread to almost 100 countries around ...