PVE correction in PET from PVE affected images

F. Gallivanone, A. Stefano, C. Canevari, C. Messa, M. C. Gilardi, I. Castiglioni

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Partial Volume Effect (PVE) in Positron Emission Tomography (PET), as a consequence of the PET limited spatial resolution, causes underestimation of radiotracer uptake in oncological lesions and needs to be corrected. Aim of this work was to develop a method for PVE correction of PET-CT oncological studies, based on curves of Recovery Coefficients (RC) as a function of measured Lesion-to-Background ratio (L/Bm) and measured lesion volume (V m). MATERIALS AND METHODS. Measurements were performed on the PET-CT scanner Discovery STE (GE Medical Systems). Measured radioactivity concentration (Cm) and Vm were estimated using both Operator-Dependent (OD) and Operator-Independent (OI) measurement techniques. RC curves were obtained by NEMA 2001 IQ phantom measurements. PVE correction was applied to anthropomorphic phantoms miming different body districts and oncological lesions. PVE correction was also applied to 16 oncological patients (both basal and follow up studies). RESULTS: The underestimation of Cm (up to 80%) confirmed the severity of the error. Residual errors between GS and PVE corrected Cm showed that the more accurate way to measure radioactivity at a regional level is by the use of an OI threshold technique. The results on the accuracy of the PVE correction method showed that the method achieves an accuracy > 88% for lesion diameter > 1cm. In patient studies PVE correction was found to modify both SUV and SUV variations (δSUV) during patient follow up, and our analysis showed that a PVE corrected SUV quantification increases the diagnostic confidence. CONCLUSION: Results proved that the proposed PVE correction method, combined with an OI threshold technique for the measurement of the radioactivity uptake, is feasible and accurate in a clinical setting.

Original languageEnglish
Title of host publicationIEEE Nuclear Science Symposium Conference Record
Pages3146-3150
Number of pages5
DOIs
Publication statusPublished - 2009
Event2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009 - Orlando, FL, United States
Duration: Oct 25 2009Oct 31 2009

Other

Other2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009
CountryUnited States
CityOrlando, FL
Period10/25/0910/31/09

Fingerprint

Positron-Emission Tomography
positrons
tomography
Radioactivity
lesions
radioactivity
operators
recovery
thresholds
curves
coefficients
scanners
confidence
spatial resolution
causes

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Nuclear and High Energy Physics
  • Radiation

Cite this

Gallivanone, F., Stefano, A., Canevari, C., Messa, C., Gilardi, M. C., & Castiglioni, I. (2009). PVE correction in PET from PVE affected images. In IEEE Nuclear Science Symposium Conference Record (pp. 3146-3150). [5401688] https://doi.org/10.1109/NSSMIC.2009.5401688

PVE correction in PET from PVE affected images. / Gallivanone, F.; Stefano, A.; Canevari, C.; Messa, C.; Gilardi, M. C.; Castiglioni, I.

IEEE Nuclear Science Symposium Conference Record. 2009. p. 3146-3150 5401688.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Gallivanone, F, Stefano, A, Canevari, C, Messa, C, Gilardi, MC & Castiglioni, I 2009, PVE correction in PET from PVE affected images. in IEEE Nuclear Science Symposium Conference Record., 5401688, pp. 3146-3150, 2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009, Orlando, FL, United States, 10/25/09. https://doi.org/10.1109/NSSMIC.2009.5401688
Gallivanone F, Stefano A, Canevari C, Messa C, Gilardi MC, Castiglioni I. PVE correction in PET from PVE affected images. In IEEE Nuclear Science Symposium Conference Record. 2009. p. 3146-3150. 5401688 https://doi.org/10.1109/NSSMIC.2009.5401688
Gallivanone, F. ; Stefano, A. ; Canevari, C. ; Messa, C. ; Gilardi, M. C. ; Castiglioni, I. / PVE correction in PET from PVE affected images. IEEE Nuclear Science Symposium Conference Record. 2009. pp. 3146-3150
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abstract = "Partial Volume Effect (PVE) in Positron Emission Tomography (PET), as a consequence of the PET limited spatial resolution, causes underestimation of radiotracer uptake in oncological lesions and needs to be corrected. Aim of this work was to develop a method for PVE correction of PET-CT oncological studies, based on curves of Recovery Coefficients (RC) as a function of measured Lesion-to-Background ratio (L/Bm) and measured lesion volume (V m). MATERIALS AND METHODS. Measurements were performed on the PET-CT scanner Discovery STE (GE Medical Systems). Measured radioactivity concentration (Cm) and Vm were estimated using both Operator-Dependent (OD) and Operator-Independent (OI) measurement techniques. RC curves were obtained by NEMA 2001 IQ phantom measurements. PVE correction was applied to anthropomorphic phantoms miming different body districts and oncological lesions. PVE correction was also applied to 16 oncological patients (both basal and follow up studies). RESULTS: The underestimation of Cm (up to 80{\%}) confirmed the severity of the error. Residual errors between GS and PVE corrected Cm showed that the more accurate way to measure radioactivity at a regional level is by the use of an OI threshold technique. The results on the accuracy of the PVE correction method showed that the method achieves an accuracy > 88{\%} for lesion diameter > 1cm. In patient studies PVE correction was found to modify both SUV and SUV variations (δSUV) during patient follow up, and our analysis showed that a PVE corrected SUV quantification increases the diagnostic confidence. CONCLUSION: Results proved that the proposed PVE correction method, combined with an OI threshold technique for the measurement of the radioactivity uptake, is feasible and accurate in a clinical setting.",
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N2 - Partial Volume Effect (PVE) in Positron Emission Tomography (PET), as a consequence of the PET limited spatial resolution, causes underestimation of radiotracer uptake in oncological lesions and needs to be corrected. Aim of this work was to develop a method for PVE correction of PET-CT oncological studies, based on curves of Recovery Coefficients (RC) as a function of measured Lesion-to-Background ratio (L/Bm) and measured lesion volume (V m). MATERIALS AND METHODS. Measurements were performed on the PET-CT scanner Discovery STE (GE Medical Systems). Measured radioactivity concentration (Cm) and Vm were estimated using both Operator-Dependent (OD) and Operator-Independent (OI) measurement techniques. RC curves were obtained by NEMA 2001 IQ phantom measurements. PVE correction was applied to anthropomorphic phantoms miming different body districts and oncological lesions. PVE correction was also applied to 16 oncological patients (both basal and follow up studies). RESULTS: The underestimation of Cm (up to 80%) confirmed the severity of the error. Residual errors between GS and PVE corrected Cm showed that the more accurate way to measure radioactivity at a regional level is by the use of an OI threshold technique. The results on the accuracy of the PVE correction method showed that the method achieves an accuracy > 88% for lesion diameter > 1cm. In patient studies PVE correction was found to modify both SUV and SUV variations (δSUV) during patient follow up, and our analysis showed that a PVE corrected SUV quantification increases the diagnostic confidence. CONCLUSION: Results proved that the proposed PVE correction method, combined with an OI threshold technique for the measurement of the radioactivity uptake, is feasible and accurate in a clinical setting.

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