Quantitative Nuclear Medicine Imaging in Oncology. Susan E. Sharp, MD

Transcription

1 Quantitative Nuclear Medicine Imaging in Oncology Susan E. Sharp, MD

2 Disclosures None

3 Objectives Describe scoring systems used in oncologic nuclear medicine imaging Deauville scoring in lymphoma Curie and SIOPEN scoring in neuroblastoma Discuss use of SUV measurements in oncologic FDG PET scans

4 Scoring Systems

5 Deauville Scoring in Lymphoma Developed in 2009 by hematologists and nuclear medicine experts Provides a simple and reproducible system for interpretation of interim FDG PET scans good or very good agreement between readers Biggi et al. J Nucl Med 2013;54:

6 Deauville Scoring System Five point scale base on visual assessment: 1 = no residual uptake above background 2 = residual uptake < mediastinum 3 = residual uptake > mediastinum, but < liver 4 = residual uptake moderately > liver 5 = residual uptake markedly > liver or new disease sites Biggi et al. J Nucl Med 2013;54:

7 Deauville Score = 2 At diagnosis After initial chemotherapy

8 Deauville Score = 3 At diagnosis After initial chemotherapy

9 Deauville Score = 5 At diagnosis After initial chemotherapy

10 Deauville Scoring System Negative: 1 = no residual uptake above background 2 = residual uptake < mediastinum 3 = residual uptake > mediastinum, but < liver Positive: 4 = residual uptake moderately > liver 5 = residual uptake markedly > liver or new disease sites Biggi et al. J Nucl Med 2013;54:

11 Interim PET in Hodgkin Lymphoma 3-year Failure Free Survival p < for central review Image from Biggi et al. J Nucl Med 2013;54:

12 MIBG Scoring Systems Semi-Quantitative Developed to quantitate disease extent and response improve precision and concordance between readers Curie scoring system used in North America SIOPEN scoring system used in Europe Matthay et al. Br J Cancer. 2010;102(9):

13 Curie Scoring System Total of 10 compartments: skeleton compartments 1-9 soft tissue compartment 10 Each compartment scored for disease extent on a 3 point scale Total score = sum of compartment scores (maximum score of 30) Image from Matthay et al. Br J Cancer. 2010;102:

14 Curie Scoring System Compartment scores: 0 = no disease sites 1 = one disease site 2 = more than one disease site 3 = diffuse disease involvement Image from Matthay et al. Br J Cancer. 2010;102:

15 SIOPEN Scoring System Total of 12 compartments: skeleton compartments 1-12 no soft tissue compartment Each compartment scored for disease extent on a 6 point scale Total score = sum of compartment scores (maximum score of 72) Image modified from Matthay et al. Br J Cancer. 2010;102:

16 SIOPEN Scoring System Compartment scores: 0 = no disease sites 1 = one disease site 2 = two disease sites 3 = three disease sites 4 = more than three disease sites, but less than 50% involvement 5 = 50-95% involvement 6 = diffuse involvement Image modified from Matthay et al. Br J Cancer. 2010;102:

17 MIBG Scoring Systems Curie and SIOPEN score highly correlated Scores correlate with response/survival in some studies at diagnosis after initial chemotherapy Curie Score > 2 after induction worse event free survival Decarolis et al. J Clin Oncol 2013;31: Yanik et al. J Nucl Med 2013;54: Matthay et al. Br J Cancer. 2010;102:

18 SUV Measurements

19 FDG PET Assessment Qualitative comparison to blood pool, liver, or brain Quantitative measurement of absolute regional radiopharmaceutical concentrations SUVmax percent change in SUVmax metabolic tumor volume tumor-to-non-tumor uptake ratios

20 SUVmax Widely used and reported SUV measurements are variable and dependent on multiple factors patient preparation scan technique and timing region of interest Studied to determine relationship to histologic response during therapy and survival Wahl et al. J Nucl Med. 2009;50:122S-50S.

21 Progression Free Survival Based on Tumor Uptake After Neoadjuvant Chemotherapy Ewing Sarcoma Osteosarcoma Images from: Hawkins et al. J Clin Oncol. 2005;23: Hawkins et al. Cancer. 2009;115(15):

22 Overall Survival Estimates Based on Primary Tumor Uptake Intensity Rhabdomyosarcoma Image: Baum et al. J Nucl Med. 2011;52: Image from Baum et al. J Nucl Med. 2011;52:

23 Conclusions Scoring systems developed to better quantify treatment response and improve concordance between readers Deauville scoring in lymphoma Curie and SIOPEN scoring in neuroblastoma PET allows measurement of absolute regional radiopharmaceutical concentrations parameters such as SUVmax studied to determine ability to predict tumor necrosis and patient survival