WebCT-BASED ATTENUATION CORRECTION One main advantage of a PET/CT scanner is that it uses the CT image for attenuation correction of the PET data rather than relying on a rotating transmission rod source. Use of the CT scan reduces the total PET acquisition time and improves the precision of the attenuation correction factors (3). Upon completion ... WebNational Center for Biotechnology Information
What Is a Breast Attenuation Artifact? - Reference.com
WebMar 23, 2024 · Beam hardening is the phenomenon that occurs when an x-ray beam comprised of polychromatic energies passes through an object, resulting in selective attenuation of lower energy photons. The effect is conceptually similar to a high-pass filter, in that only higher energy photons are left to contribute to the beam and thus the mean … WebJan 24, 2016 · Images were acquired in the supine position with a two-headed gamma camera with step-and-shoot rotation, 32 projections over a 90-degree arc for each head (64 projections over a 180-degree arc), 30 … scotch education department
Interpretation of SPECT/CT Myocardial Perfusion Images
WebPurpose: To assess the effect on reducing the out-of-plane artifacts from metal objects in breast tomosynthesis (BT) using a novel artifact-reducing reconstruction algorithm in specimen radiography. Methods and materials: The study was approved by the Regional Ethical Review Board. BT images of 18 partial- and whole mastectomy specimens from ... WebShifting breast attenuation artifact mimicking ischemia: Resolved with attenuation correction J Nucl Cardiol. 2024 Dec;26(6):2142-2147. doi: 10.1007/s12350-018-01529-3. Epub 2024 Nov 20. Authors E Gordon DePuey 1 , Jereme Morley 2 , Anna Leykekhman 2 Affiliations 1 Mount Sinai St. Luke's Hospital, New York, NY, USA. … WebNov 21, 2024 · If the attenuation artifact only affects the stress images, it may show as a pseudoreversible defect that can result in a false-positive finding (the so-called shifting breast artifact, Fig. 5.2). Images should be carefully reviewed for the size and placement of the breast shadow and to see if any shift may have occurred between rest and stress ... scotcheer allstars