objective: cone beam computed tomography (cbct) is applied for the imaging of the maxillofacial and dental structures, particularly for surgical treatments and dental implants. the aim of this study was to assess the effect of slice thickness on the accuracy of cbct linear measurements. methods: in this diagnostic accuracy study, forty-two titanium pins with the same dimensions were inserted in...

CBCT images have been widely used in digital orthodontics. In images, there are some tooth boundaries of blurriness and disappearance, the teeth intensity inhomogeneity. order to identify these segment teeth, this paper develops an approach alternate level set evolutions with controlled switch via slice-by-slice segmentation: user selects a voxel inside initialize small circle encircling voxel,...

The slice filtration on Voevodsky’s triangulated category of motives is defined by effectivity conditions. It is constructed and studied in [HK]. An analogous filtration on the homotopy category was introduced by Voevodsky. In this note we try to get a conjectural picture of the properties of the slice filtration by systematic use of the realization functor to the derived category of Hodge stru...

The objective of this study was to evaluate the utility of brain tissue slices to determine the effect of plasma and brain tissue nonspecific binding on the brain-to-plasma ratio (K(p)). Mouse or rat brain slices (400 microm) were prepared using a McIlwain tissue chopper (Surrey, UK) and incubated with 1 microg/ml of compound at 37 degrees C either in a physiological buffer to determine the buf...

A novel three-layer microfluidic polydimethylsiloxane (PDMS) device was constructed with two fluid chambers that holds a brain slice in place with microposts while maintaining laminar perfusate flow above and below the slice. Our fabrication technique permits rapid production of PDMS layers that can be applied to brain slices of different shapes and sizes. In this study, the device was designed...

Many approaches to slicing rely upon the ‘fact’ that the union of two static slices is a valid slice. It is known that static slices constructed using program dependence graph algorithms are valid slices [19]. However, this is not true for other forms of slicing. For example, it has been established that the union of two dynamic slices is not necessarily a valid dynamic slice [8]. In this paper...

Volumetric, slice-based, 3-D atlases are invaluable tools for understanding complex cortical convolutions. We present a simple scheme to convert a slice-based atlas to a conceptual surface atlas that is easier to visualize and understand. The key idea is to unfold each slice into a one-dimensional vector, and concatenate a succession of these vectors--while maintaining as much spatial contiguit...

Segmentation of organs from CT and MR image series is a challenging research area in all fields of medical imaging. Although, organs of interest are threedimensional in nature, slice-by-slice approaches are widely used in clinical applications because of their ease of integration with the current manual segmentation scheme (i.e. gold standard). Moreover, the high anisotropy of CT and MR data ma...

A popular technique to reduce respiratory motion for cardiovascular magnetic resonance is to perform a multi-slice acquisition in which a patient holds their breath multiple times during the scan. The feasibility of rigid slice-to-volume registration to correct for misalignments of slice stacks in such images due to differing breath-hold positions is explored. Experimental results indicate that...

which restricts to the given links at the ends. A link is called (topologically) slice if it is concordant to the trivial m–component link or, equivalently, if it bounds a flat embedding of m disjoint slice disks D2 ∐ · · · ∐D2 ֒→ D4. In the special case m = 1 we refer to the link as a knot. If the embeddings above are required to be C, or smooth, then these notions are called smoothly concordan...