In the unsharp masking approach for image enhancement, a fraction of highpass filtered version is added to original form enhanced version. The method simple, but it suffers from two serious drawbacks. First, enhances contrast in darker areas perceptually much more strongly than that lighter areas. Second, noise and/or digitization effects, particularly regions, resulting visually less pleasing images. general, can be suppressed with lowpass filters, which are associated blurring edges. On...

We assess dose and image quality of a state-of-the-art angiographic C-arm system (Axiom Artis dTA, Siemens Medical Solutions, Forchheim, Germany) for three-dimensional neuro-imaging at various levels tube voltages an associated measurement method. Unlike conventional CT, the beam length covers entire phantom, hence, concept computed tomography index (CTDI) is not metric choice, one can revert to dosimetry methods by directly measuring points using small ion chamber. This method allows us...

We introduce PLIKS (Pseudo-Linear Inverse Kinematic Solver) for reconstruction of a 3D mesh the human body from single 2D image. Current techniques directly regress shape, pose, and translation parametric model an input image through non-linear mapping with minimal flexibility to any external influences. approach task as model-in-the-loop optimization problem. is built on linearized formulation SMPL model. Using PLIKS, we can analytically reconstruct via pixel-aligned vertices. This enables...

There has been a tremendous amount of research on object localization either involving microphone arrays or video cameras. Considerable less attention paid, however, to and tracking based joint audio-video processing thus far. This may be related the lack suitable algorithms for simultaneously using multimicrophone outputs color image sequences. In this article, we propose solution problem. Before elaborating processing, review some previous work areas audio localization. Then recursive...

Accuracy of Catheter Guidance Technology in the EP Lab Background With increasing complexity electrophysiology (EP) procedures, use electroanatomic mapping systems (EAMS) as a supplement to fluoroscopy has become common practice. This is first study that evaluates spatial and point localization accuracy for 2 current EAMS, CARTO3 ® (Biosense Webster, Diamond Bar, CA, USA) EnSite Velocity (St. Jude Medical Inc., St. Paul, MN, USA), novel overlay guidance (OG) software (Siemens AG, Forchheim,...

Scatter correction is an active research topic in cone beam computed tomography (CBCT) because CBCT (especially flat-panel detector (FPD) based) systems have large scatter-to-primary ratios. produces artifact and contrast reduction, difficult to model accurately. Direct measurement using a blocker array provides accurate scatter estimates. However, since the also blocks primary radiation, imaging requires second (or subsequent) scan without place. This approach inefficient terms of scanning...

Electrophysiology (EP) studies and catheter ablation have become important treatment options for several types of cardiac arrhythmias. We present a novel image-based approach automatic detection 3-D reconstruction EP catheters where the physician marks to be reconstructed by single click in each image. The result can used provide information enhanced navigation throughout procedures. Our involves two X-ray projections acquired from different angles, it is based on steps: First, we detect...

Purpose: The combination of quickly rotating C‐arm gantry with digital flat panel has enabled the acquisition three‐dimensional data (3D) in interventional suite. However, image quality is still somewhat limited since hardware not been optimized for CT imaging. Adaptive anisotropic filtering ability to improve by reducing noise level and therewith radiation dose without introducing noticeable blurring. By applying prior 3D reconstruction, noise‐induced streak artifacts are reduced as...

Catheter tracking has become more and important in recent interventional applications. It provides real time navigation for the physicians can be used to control a motion compensated fluoro overlay reference image other means of guidance, e.g. involving 3D anatomical model. Tracking coronary sinus (CS) catheter is effective compensate respiratory cardiac assist positioning ablation Atrial Fibrillation (Afib) treatments. During interventions, CS performs rapid non-rigid deformation due...

Vitamin D has previously been quantified in some plants and algae, particularly leaves of the Solanaceae family. We measured vitamin content Australian native food Australian-grown edible seaweed. Using liquid chromatography with triple quadrupole mass spectrometry, 13 samples (including leaf, fruit, seed) were analyzed duplicate for D2, D3, 25-hydroxyvitamin D3. Five contained D2: raw wattleseed (Acacia victoriae) (0.03 µg/100 g dry weight (DW)); fresh dried lemon myrtle (Backhousia...

C-arm volume reconstruction has become increasingly popular over the last years. These imaging systems generate 3D data sets for various interventional procedures such as endovascular treatment of aneurysms or orthopedic applications. Due to their open design and mechanical instability, acquire projections along non-ideal scan trajectories. Volume from filtered 2D X-ray requires a very precise knowledge geometry. We show that image quality cone beam devices can be improved by proper...

To assess the potential dietary supply of vitamin D to Australian adults by application new data for primary foods animal origin.New published analytical on contents from products were obtained and assessed reliability. Using food consumption population surveys 1995 2011-2013, estimates made likely average daily intakes equivalents these sources adults.Meats, chicken, fish, eggs dairy produce may alone have contributed about 4.2 μg per day diets >18 years in 4.3 2011-2013.Dietary intake...

Fluoroscopic overlay images rendered from preoperative volumetric data can provide additional anatomical details to guide physicians during catheter ablation procedures for treatment of atrial fibrillation (AFib). As these are often compromised by cardiac and respiratory motion, motion compensation methods needed keep the in sync with fluoroscopic images. So far, approaches have either required simultaneous biplane imaging 3-D compensation, or case monoplane X-ray imaging, provided only a...

Minimally invasive interventions often involve tools of curvilinear shape like catheters and guide-wires. If the camera parameters a fluoroscopic system or stereoscopic endoscope are known, 3-D reconstruction corresponding points can be computed by triangulation. Manual identification point correspondences is time consuming, but there exist methods that automatically select along structures. The focus here on evaluation recent published method for catheter from two views. A previous this...

Dietary vitamin D may compensate for inadequate sun exposure; however, there have been few investigations into the content of Australian foods. We measured D3 and 25-hydroxyvitamin (25(OH)D3) in four species white fish (barramundi, basa, hoki king dory), chicken eggs (cage free-range), purchased from five cities. Samples included local, imported wild-caught fish, varying size producers with a range hen stocking densities. Raw cooked samples were analysed using high performance liquid...