This study investigated the implications of different assumptions 3D forest stand reconstructions for accuracy and efficiency radiative transfer (RT) modeling based on two highly detailed representations: 3D-explicit voxel-based. The discrete anisotropic (DART) model was used RT simulations. voxel-based scenes were as structural inputs DART model, respectively. Using simulation benchmark, evalu...

A spectral analysis approach was used to estimate kinetic parameters of the L-[1-(11)C]leucine positron emission tomography (PET) method and regional rates of cerebral protein synthesis (rCPS) on a voxel-by-voxel basis. Spectral analysis applies to both heterogeneous and homogeneous tissues; it does not require prior assumptions concerning number of tissue compartments. Parameters estimated wit...

background although magnetic resonance spectroscopy (mrs) has been shown as an effective diagnostic tool in distinguishing inflammation from neoplasm in cystic brain lesions, the optimum approach in selecting the portions of lesions in mrs and the possible effects of different times of echoes (tes) remains unknown. objectives to determine the most effective te in diagnosing neoplastic lesions b...

An analysis of a rasterization algorithm for generating supercover planes in 3D voxel space is presented. The derived algorithm is an extension to the classical 2D line rasterization algorithm. Additional voxels needed to form the supercover 3D plane are identified by rasterizing two additional 2D lines per volume slice. A discussion on how to modify the algorithm to rasterize finite supercover...

Conversion of unorganized point clouds to surface reconstructions is increasingly required in the mobile robotics perception processing pipeline, particularly with the rapid adoption of RGB-D (color and depth) image sensors. Many contemporary methods stem from the work in the computer graphics community in order to handle the point clouds generated by tabletop scanners in a batch-like manner. T...

Introduction: Single-voxel H MR spectroscopy of human breast cancer has become increasingly common, with clinical applications in diagnosis and treatment monitoring, and multi-site clinical trials currently in progress. In order for these measurements to be useful in characterizing lesions, the MRS voxel placement must be accurate and consistent. Poor voxel placement creates partial volume erro...

  Objective: The diagnosis of vertical root fracture (VRF) in endodontically treated teeth is a clinical challenge due to lack of specific clinical and radiographic signs. Although radiographic evaluation such as CBCT is helpful, intracanal posts can produce artifacts and may impair the quality of CBCT scans. This study aimed to compare the diagnostic accuracy of different resolutions of CBCT i...

BACKGROUND We evaluated the diagnostic implications of a small-voxel reconstruction for lymph node characterization in breast cancer patients, using state-of-the-art FDG-PET/CT. We included 69 FDG-PET/CT scans from breast cancer patients. PET data were reconstructed using standard 4 × 4 × 4 mm3 and small 2 × 2 × 2 mm3 voxels. Two hundred thirty loco-regional lymph nodes were included, of which ...