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Breast cancer is the most common category of cancers in woman around the world. Ultrasonography imaging modalities (US) are highly recommended for breast cancer examining due to their sensitivity, specificity, cost-effective, accessibility, portability, comfort, as well as non-invasive tool. In addition, an integration of a conventional US and its adjunct modalities which is Power Doppler has been...
Regular examination of breasts may prevent and help to cure because breast cancer is treatable when it is detected early. Therefore, a breast cancer screening modality being sensitivity and cost-effective like ultrasonic imaging modality (US), is strongly required. In addition, the combination of a conventional US and its adjunct, Color Doppler has been proved for decreasing the rate of false-positive...
Three-dimension (3D) medical images on eHealth can facilitate early diagnosis and treatment planning for physicians and dentists anytime and anywhere. However, high-resolution 3D medical images created from most medical imaging devices are difficult to render interactively with high-quality in real-time on the client side. This paper tackles this problem. It presents a web-based client-server framework...
The success of dental implant surgery is subject to accurate advanced planning. In order to properly plan for suitable implant placement, it is necessary for accurate segmentation of the inferior alveolar canal. This paper presents a new approach of a semi-automatic method based on a new and effective active contour model viz. an adaptive diffusion flow active contour model. Cone-beam computed tomography...
Filtered back-projection (FBP) is the most commonly used reconstruction method for computed tomographic image reconstruction due to its practicality in comparison with other computationally demanding methods. However, the FBP is still a very computationally expensive algorithm to implement, given that real world data obtained from CT machine are relatively large. Memory management and arithmetic computation...
X-ray scattering in the cone beam computed tomography system can lead to undesirable reduction in contrast and overall image quality of reconstructed images. The scatters inside the object cause a serious problem, especially when the object is large and contains a lot of materials, such as bones and soft tissues. In this paper, the amount of X-ray scattering is numerically estimated using the Monte...
Due to accurate 3D information, minimal radiation dose, and low machine cost, cone-beam computed tomography (CBCT) has become increasingly popular in dental and maxillofacial imaging. In this paper, we propose the first development of the CBCT scanner in Thailand, called DentiiScan. The gantry system uses a cone-beam X-ray source and a large amorphous silicon flat panel detector to rotate around a...
In this research, we propose a natural interaction on 3D medical image viewer software. The goal is to replace the windows, icon, mouse and pointer (WIMP) paradigm which might not be convenient in an operating room as sterilization becomes an issue. The Kinect sensor was used as a controller-free input. The fingertip tracking algorithm was implemented and, combined with existing skeletons from the...
Due to accurate 3D information, computed tomography (CT), especially cone-beam CT or dental CT, has been widely used for diagnosis and treatment planning in dentistry. Axial images acquired from both medical and dental CT scanners can generate synthetic panoramic images similar to typical 2D panoramic radiographs. However, the conventional way to reconstruct the simulated panoramic images is to manually...
Cone-beam computed tomography (CBCT) has become increasingly popular in dental and maxillofacial imaging due to its accurate 3D information, minimal radiation dose, and low machine cost. In this paper, we have proposed the newly developed CBCT scanner, called DentiiScan. Our gantry system consisting of a cone-beam X-ray source and an amorphous silicon flat panel detector is rotated around a patient's...
Scatter signals in cone-beam computed tomography (CBCT) cause a significant problem that degrades image quality of reconstructed images, such as inaccuracy of CT numbers and cupping artifacts. In this paper, we will present an experiment-based scatter correction method by pre-processing projection images using a statistical model combined with experimental kernels. The convolution kernels are estimated...
A common interaction with medical 2D and 3D images is to apply windows, icons, menus and pointers (WIMP) paradigm; however, WIMP might not be convenient in some situation, such as in the operating room where sterilization becomes an issue. Thus, in this project, the controller-free natural interaction on 3D medical image viewer software through a Kinect camera will be developed to replace WIMP such...
Nowadays computed tomography (CT) becomes very popular and useful in both medical and dental areas. Due to the standard DICOM (Digital Imaging and Communications in Medicine) file format of CT images containing special headers of image, patient and device information, dentists or specialists require to use DICOM viewer software to display those images. After acquiring a CT scan, a traditional way...
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