Correlating Lung Cancer Responses to Radiotherapy Using PET-CT Imaging
Author Information
Author(s): Wong Ching-yee O, Schmidt Joseph, Bong Jeffery S, Chundru Suyra, Kestin Larry, Yan Di, Grills Inga, Gaskill Marianne, Cheng Vincent, Martinez Alvaro A, Fink-Bennett Darlene
Primary Institution: William Beaumont Hospital, Royal Oak, Michigan, USA
Hypothesis
To correlate the metabolic changes with size changes for tumor response by concomitant PET-CT evaluation of lung cancers after radiotherapy.
Conclusion
Incorporating metabolic change by PET into size change by CT is more sensitive in assessing therapeutic response than CT alone.
Supporting Evidence
- There was a significant reduction in both SUV and size of the primary cancer after radiotherapy.
- The metabolic change (SUV) was highly correlated with the change in size.
- The mean percentage metabolic change was significantly larger than that of size change.
Takeaway
Doctors used special scans to see how lung tumors changed after treatment, and they found that looking at both the size and the metabolism of the tumors gives a better idea of how well the treatment worked.
Methodology
36 patients were studied pre- and post-radiotherapy with 18FDG PET-CT scans, and changes in size and metabolic activity were correlated.
Potential Biases
Potential bias in patient selection as all patients were considered inoperable.
Limitations
The study was limited by the small sample size and the follow-up period.
Participant Demographics
36 patients (15 males, 21 females) with a mean age of 64 years.
Statistical Information
P-Value
p < 0.00005
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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