Related Experiment Videos
Comparison of simplified quantitative analyses of FDG uptake
M M Graham1, L M Peterson, R M Hayward
1University of Iowa, Iowa City, Iowa 52242, USA.
Nuclear Medicine and Biology
|November 25, 2000
Summary
Body surface area (BSA) normalization improves quantitative analysis in oncologic PET scans. Patlak graphical analysis (PGA) best predicts patient outcomes and distinguishes tumors from normal tissue.
Area of Science:
- Nuclear medicine
- Oncologic imaging
- Quantitative analysis
Background:
- Quantitative analysis of [(18)F]-fluoro-deoxyglucose (FDG) uptake in positron emission tomography (PET) is crucial for cancer diagnosis, therapy assessment, and prognosis.
- Standardized uptake value (SUV), normalized by body weight, is the common clinical method, but other normalizations like lean body mass (LBM) or body surface area (BSA) exist.
- More complex methods like simplified kinetic analysis (SKA) and Patlak graphical analysis (PGA) aim for more accurate metabolic rate determination.
Purpose of the Study:
- To compare different quantitative methods for FDG uptake in oncologic PET.
- To evaluate normalization schemes (body weight, LBM, BSA) and kinetic analyses (SKA, PGA) for accuracy and predictive value.
- To assess the ability of these methods to distinguish between malignant and benign tissues and predict patient survival.
Main Methods:
- A study involving 40 patients with colon cancer metastatic to the liver.
- Comparison of FDG uptake quantification methods based on correlation with FDG metabolic rate (FDGMR).
- Assessment of predictive ability for survival using Kaplan-Meier plots and diagnostic performance using ROC curves.
Main Results:
- Body surface area (BSA) emerged as the optimal normalization scheme for SUV, showing minor variations based on calculation methods.
- Patlak graphical analysis (PGA) demonstrated the strongest performance as a predictor of patient outcomes and in differentiating tumor from normal liver tissue.
- Simplified kinetic analysis (SKA) also showed significant utility, performing nearly as well as PGA.
Conclusions:
- Normalizing SUV with BSA is recommended for conventional PET imaging.
- SKA offers a distinct improvement when a single blood sample is available.
- PGA provides the most accurate results when multiple images and at least one blood sample are available, making it ideal for complex quantitative analysis.