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Research ArticleHEAD & NECK

Whole-Tumor Perfusion CT Parameters and Glucose Metabolism Measurements in Head and Neck Squamous Cell Carcinomas: A Pilot Study Using Combined Positron-Emission Tomography/CT Imaging

S. Bisdas, K. Spicer and Z. Rumboldt
American Journal of Neuroradiology August 2008, 29 (7) 1376-1381; DOI: https://doi.org/10.3174/ajnr.A1111
S. Bisdas
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K. Spicer
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Z. Rumboldt
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Abstract

BACKGROUND AND PURPOSE: Previous (separately performed) perfusion CT (PCT) and PET studies have been inconclusive regarding the correlation of functional tumor characteristics. The purpose of this study was to perform dual assessment of head and neck squamous cell carcinomas (SCCAs) to examine the relationship between perfusion measurements derived from PCT and glucose standardized uptake values (SUV).

MATERIALS AND METHODS: We prospectively evaluated 15 primary and recurrent SCCAs using combined positron-emission tomography (PET) and CT of the head and neck. SUVmean, SUVmax, blood flow (BF), blood volume (BV), mean transit time (MTT), and permeability (PS) values were calculated with use of manually drawn regions of interest (ROIs) over the lesions and the healthy muscle tissue. Parametric comparison test, correlation coefficients, and regression analysis were performed.

RESULTS: The mean (± SD) SUVmean, SUVmax, BF, BV, MTT, and PS values in the tumor tissue were 6.26 (± 1.48), 15.25 (± 3.81), 91.50 (± 24.69), 5.08 (± 1.17), 7.51 (± 2.24), and 23.08 (± 8.77), respectively. All PET/CT and PCT parameters of muscle versus tumor tissue were statistically different (.0001 < P < .001). There were significant correlations between BF and SUVmax as well as SUVmean (r = 0.57; P = .02 and r = 0.63; P = .011, respectively) in the tumors. Significant correlation was also found between PS and SUVmean (r = 0.53; P = .04) in the tumors. Regression analysis showed: SUVmax = 0.09 × BF + 7.2 (R2 = 0.33; P = .02), SUVmean = 0.05 × BF + 2.22 (R2 = 0.45; P = .011), and SUVmean = 0.05 × PS + 5.36 (R2 = 0.35; P = .04). The tumor to nontumor (muscle) SUVmean and SUVmax ratio was 9.45 (± 3.55) and 17.58 (± 4.32), respectively. BF-ratio SUVmean and BF-ratio SUVmax showed significant correlations (r = 0.64; P = .01 and r = 0.53; P = .04, respectively). Regression analysis showed ratio SUVmean = 0.14 × BF-3.48 (R2 = 0.42; P = .01) and ratio SUVmax = 0.14 × BF + 4.51 (R2 = 0.29; P = .04).

CONCLUSION: Tissue perfusion-metabolic coupling is evident in head and neck SCCAs and may provide additional diagnostic information in patients undergoing PET/CT studies.

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American Journal of Neuroradiology: 29 (7)
American Journal of Neuroradiology
Vol. 29, Issue 7
August 2008
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Whole-Tumor Perfusion CT Parameters and Glucose Metabolism Measurements in Head and Neck Squamous Cell Carcinomas: A Pilot Study Using Combined Positron-Emission Tomography/CT Imaging
S. Bisdas, K. Spicer, Z. Rumboldt
American Journal of Neuroradiology Aug 2008, 29 (7) 1376-1381; DOI: 10.3174/ajnr.A1111

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Whole-Tumor Perfusion CT Parameters and Glucose Metabolism Measurements in Head and Neck Squamous Cell Carcinomas: A Pilot Study Using Combined Positron-Emission Tomography/CT Imaging
S. Bisdas, K. Spicer, Z. Rumboldt
American Journal of Neuroradiology Aug 2008, 29 (7) 1376-1381; DOI: 10.3174/ajnr.A1111
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