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- W2547363176 abstract "The clinical use of [18F] Fluoro-Deoxy-Glucose Positron Emission Tomography (FDG-PET) has emerged as a non-invasive diagnostic tool for malignant tumors and become widespread [1]. Although the most frequently used index is the maximum standardized uptake value (SUVmax) [2,3], it cannot reflect metabolic activity of the tumor whole volume. [4]. Recently, volume-based parameters such as Metabolic Tumor Volume (MTV) or total lesion glycolysis (TLG) have come to be used as important prognostic markers in several cancers [5-8]. MTV is defined as the volume of hyper-metabolic tissue within the region of the gross tumor with an SUV greater than certain threshold. Total Lesion Glycolysis (TLG) is calculated by multiplying the mean standardized uptake value (SUVmean) by the tumor volume [9]. Although appropriate threshold value is still under discussion, MTV at threshold about 40% is significant predictor of patients’ outcome in head and neck cancer (HNC) [10,11]. However, it will not cover entire tumor volume even if we set it in 40% threshold (Figure 1). In non-small cell lung cancer (NSCLC), various thresholds such as 50% or 70% were used for calculating MTV [12,13].In our data, the most appropriate threshold in calculating MTV for early prediction of therapeutic effect of NSCLC was fixed value SUV2.5 or SUV3.5. (Figure 2). The agreement of an appropriate threshold is necessary for evaluating prognostic values of cancer treatment." @default.
- W2547363176 created "2016-11-11" @default.
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- W2547363176 date "2014-01-01" @default.
- W2547363176 modified "2023-09-23" @default.
- W2547363176 title "The Problem of Metabolic Tumor Volume in FDG/PET for Evaluating Cancers - Determination of Threshold and Use of Methionine-PET" @default.
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