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Liver Perfusion Imaging in Patients with Primary and Metastatic Liver Malignancy

Prospective Comparison between 99mTc-MAA SPECT and Dynamic CT Perfusion
Published:January 30, 2012DOI:https://doi.org/10.1016/j.acra.2011.12.015

      Rationale and Objectives

      To prospectively analyze the correlation between parameters of liver perfusion from technetium99m-macroaggregates of albumin (99mTc-MAA) single photon emission computed tomography (SPECT) with those obtained from dynamic CT perfusion in patients with primary or metastatic liver malignancy.

      Materials and Methods

      Twenty-five consecutive patients (11 women, 14 men; mean age 60.9 ± 10.8; range: 32–78 years) with primary (n = 5) or metastatic (n = 20) liver malignancy planned to undergo selective internal radiotherapy underwent dynamic contrast-enhanced CT liver perfusion imaging (four-dimensional spiral mode, scan range 14.8 cm, 15 scans, cycle time 3 seconds) and 99mTc-MAA SPECT after intraarterial injection of 180 MBq 99mTc–MAA on the same day. Data were evaluated by two blinded and independent readers for the parameters arterial liver perfusion (ALP), portal venous perfusion (PVP), and total liver perfusion (TLP) from CT, and the 99mTc-MAA uptake-ratio of tumors in relation to normal liver parenchyma from SPECT.

      Results

      Interreader agreements for quantitative perfusion parameters were high for dynamic CT (r = 0.90–0.98, each P < .01) and 99mTc -MAA SPECT (r = 0.91, P < .01). Significant correlation was found between 99mTc-MAA uptake ratio and ALP (r = 0.7, P < .01) in liver tumors. No significant correlation was found between 99mTc-MAA uptake ratio, PVP (r = −0.381, P = .081), and TLP (r = 0.039, P = .862).

      Conclusion

      This study indicates that in patients with primary and metastatic liver malignancy, ALP obtained by dynamic CT liver perfusion significantly correlates with the 99mTc-MAA uptake ratio obtained by SPECT.

      Key Words

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