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تعداد نتایج: 26 فیلتر نتایج به سال:
OBJECTIVE To evaluate the frequency and adequacy of statistical analyses in a general radiology journal when reporting a reliability analysis for a diagnostic test. MATERIALS AND METHODS Sixty-three studies of diagnostic test accuracy (DTA) and 36 studies reporting reliability analyses published in the Korean Journal of Radiology between 2012 and 2016 were analyzed. Studies were judged using ...
A biomarker or biological marker is defined as an indicator of a biological state or existence in the past of a particular type of organism. Biomarkers are objectively measured and evaluated as indicators of normal biological processes, pathogenic processes, or pharmacologic responses to a therapeutic intervention. Over the last two decades such biomarkers have been developed in many fields of ...
PURPOSE To evaluate the performance of lesion volumetry in hepatic CT as a function of various imaging acquisition parameters. METHODS An anthropomorphic abdominal phantom with removable liver inserts was designed for this study. Two liver inserts, each containing 19 synthetic lesions with varying diameter (6-40 mm), shape, contrast (10-65 HU), and both homogenous and mixed-density were desig...
We would like to draw the attention of the hematology and nuclear medicine communities to the importance of standardized uptake value (SUV) harmonization in response evaluation in non-Hodgkin lymphoma (NHL) patients. In NHL patients, the response evaluation during treatment (interim positron emission tomography (PET)) is currently assessed by comparing the residual metabolic activity in the mos...
The concept of imaging biomarkers was conceived in the late 1990s. The process of deduction from “complex” imaging data to a few simpler indices is often required for biomarkers to be quantitative and reproducible. Widespread examples in the field of PET imaging include the standard uptake value (SUV) to represent tumor FDG uptake and quantitative statistical mapping methods by using the z scor...
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