WebJul 20, 2016 · The effects of detector readout gain mode and bowtie filters on cone-beam CT (CBCT) image quality and dose were characterized for a new CBCT system developed for point-of-care imaging of the head, with potential application to diagnosis of traumatic brain injury, intracranial hemorrhage (ICH), and stroke. ... WebMar 8, 2016 · The purpose of this study was to implement full/half bowtie filter models in a commercial treatment planning system (TPS) to calculate kilovoltage (kV) cone-beam CT (CBCT) doses of Varian On-Board Imager (OBI) kV X-ray imaging system. The full/half bowtie filter models were created as compensators in Pinnacle TPS using MATLAB …
Image artifacts caused by incorrect bowtie filters in cone‐beam CT ...
WebMethods: The effects of bowtie filters on dose and x-ray scatter were investigated in a compact geometry (180 mm air gap), for three detector curvatures: Flat, Focused at source, and Compact focused at isocenter. Experiments used bowtie filters of varying curvature combined with antiscatter grids (GR: 8:1, 80 lpmm). WebFeb 1, 2009 · An aluminum bowtie filter is used for CBCT image acquisition for adjustment purposes. This filter decreases the scattering, beam-hardening, and charge-trapping … blue striped upholstery fabric
[OA026] Design of an optimised bow-tie filter for cone …
WebPurpose: To present our experiences in understanding and minimizing bowtie-filter crescent artifacts and bowtie-filter normalization artifacts in a clinical cone beam computed tomography system. Methods: Bowtie-filter position and profile variations during gantry rotation were studied. Two previously proposed strategies (A and B) were applied to the … Webmode in BEAMnrc. (a) Full-fan mode uses full bowtie filter, and (b) half bowtie filter is used for half-fan mode ..... 16 2. Lateral and depth dose profile measurement setup with a water tank and an ion blue striped yellow shirt