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Start Over Author "Fogelman I" Publisher lippincott williams & wilkins
79 results on '"Fogelman I"'

1. Recent Advances in Imaging Hepatocellular Carcinoma: Diagnosis, Staging and Response Assessment: Functional Imaging.

Author

Hain, S. F. and Fogelman, I.

Subjects
LIVER cancer, LIVER metastasis, TOMOGRAPHY, THERAPEUTICS, SYMPTOMS, DISEASES
Abstract

Multidetector computed tomography provides robust evaluation of the hopatic parenchyma. It plays a critical role in the detection of liver metastases and the assessment of treatment response to therapy. In this article, we discuss the role of multidetector computed tomography in the detection and characterization of hepatic metastases, and the value of image processing with volume rendering and maximum-intensity projection techniques in the accurate delineation of hepatic vascular anatomy and the segmental localization of lesions. This information is critical in the diagnosis and treatment of patients with metastatic disease and is essential in surgical and nonsurgical planning. [ABSTRACT FROM AUTHOR]

Published
2004
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50. Comparison of ordered-subset expectation maximization and filtered back projection reconstruction based on quantitative outcome from dynamic [18F]NaF PET images.

Author

Wong JM, Puri T, Siddique MM, Frost ML, Moore AEB, Blake GM, and Fogelman I

Subjects
Humans, Female, Middle Aged, Aged, Algorithms, Artifacts, Positron-Emission Tomography methods, Image Processing, Computer-Assisted methods, Sodium Fluoride, Fluorine Radioisotopes
Abstract

[18F]NaF PET imaging is a useful tool for measuring regional bone metabolism. However, due to tracer in urine, [18F]NaF PET images of the hip reconstructed using filtered back projection (FBP) frequently show streaking artifacts in slices through the bladder leading to noisy time-activity curves unsuitable for quantification. This study compares differences between quantitative outcomes at the hip derived from images reconstructed using the FBP and ordered-subset expectation maximization (OSEM) methods. Dynamic [18F]NaF PET data at the hip for four postmenopausal women were reconstructed using FBP and nine variations of the OSEM algorithm (all combinations of 1, 5, 15 iterations and 10, 15, 21 subsets). Seven volumes of interest were placed in the hip. Bone metabolism was measured using standardized uptake values, Patlak analysis (Ki-PAT) and Hawkins model Ki-4k. Percentage differences between the standardized uptake values and Ki values from FBP and OSEM images were assessed. OSEM images appeared visually smoother and without the streaking artifacts seen with FBP. However, due to loss of counts, they failed to recover the quantitative values in VOIs close to the bladder, including the femoral head and femoral neck. This was consistent for all quantification methods. Volumes of interest farther from the bladder or larger and receiving greater counts showed good convergence with 5 iterations and 21 subsets. For VOIs close to the bladder, including the femoral neck and femoral head, 15 iterations and 10, 15 or 21 subsets were not enough to obtain OSEM images suitable for measuring bone metabolism and showed no improvement compared to FBP., (Copyright © 2021 Wolters Kluwer Health, Inc. All rights reserved.)

Published
2021
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