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Albert Henry Roger Lonn
Researcher at GE Healthcare
Publications - 16
Citations - 400
Albert Henry Roger Lonn is an academic researcher from GE Healthcare. The author has contributed to research in topics: Correction for attenuation & Iterative reconstruction. The author has an hindex of 8, co-authored 16 publications receiving 373 citations. Previous affiliations of Albert Henry Roger Lonn include General Electric.
Papers
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Journal ArticleDOI
Comparison of 4-class and continuous fat/water methods for whole-body, MR-based PET attenuation correction
Scott David Wollenweber,Sonal Ambwani,Albert Henry Roger Lonn,Dattesh Dayanand Shanbhag,Sheshadri Thiruvenkadam,Sandeep Kaushik,Rakesh Mullick,Florian Wiesinger,Hua Qian,Gaspar Delso +9 more
TL;DR: It is demonstrated that both 4class and continuousFat/water AC methods provided adequate quantitation in the body, and that the continuous fat/water method was within 5.7% on average for SUV mean in liver and 1.6% onaverage for SUV max for FDG-avid features.
Journal ArticleDOI
Evaluation of an atlas-based PET head attenuation correction using PET/CT & MR patient data
Scott David Wollenweber,Sonal Ambwani,Gaspar Delso,Albert Henry Roger Lonn,Rakesh Mullick,Florian Wiesinger,Z. Piti,A. Tari,G. Novak,M. Fidrich +9 more
TL;DR: PET image visualization demonstrated spatial variations in activity concentration accuracy induced by the AC methods that were consistent with the approximations in each method, demonstrating that the atlas-based AC in the head provides adequate PET quantitation and image quality as compared to methods that do not account for bone.
Journal ArticleDOI
Truncation artifact on PET/CT: impact on measurements of activity concentration and assessment of a correction algorithm.
Osama Mawlawi,Jeremy J. Erasmus,Tinsu Pan,Dianna D. Cody,Rachelle Campbell,Albert Henry Roger Lonn,S.G. Kohlmyer,Homer A. Macapinlac,Donald A. Podoloff +8 more
TL;DR: Truncation affects measurements of 18F-FDG activity concentrations in PET/CT and a truncation-correction algorithm corrects truncation artifacts with small residual error is assessed.
Proceedings ArticleDOI
Ultra low dose CT for attenuation correction in PET/CT
James G. Colsher,Jiang Hsieh,Jean-Baptiste Thibault,Albert Henry Roger Lonn,Tinsu Pan,Stephen J. Lokitz,Timothy G. Turkington +6 more
TL;DR: This paper presents an ultra low-dose CT acquisition and reconstruction technique that provides sufficient image quality for PET attenuation correction while keeping the CT dose to a minimum and reduces shading and CT number shifts in PET images.
Patent
Computed tomographic image reconstruction method for helical scanning using interpolation of partial scans for image construction
TL;DR: In this paper, a method of reducing image artifacts in images acquired with fan beam, helical scanning, tomographic imaging systems uses half scans of less than 360° of projection data of an imaged object on each side of the slice plane being imaged.