Abdominal Imaging

, Volume 40, Issue 6, pp 1432–1440 | Cite as

Simultaneous 68Ga-DOTA-TOC PET/MRI with gadoxetate disodium in patients with neuroendocrine tumor

  • Thomas A. Hope
  • Miguel Hernandez Pampaloni
  • Eric Nakakura
  • Henry VanBrocklin
  • James Slater
  • Salma Jivan
  • Carina Mari Aparici
  • Judy Yee
  • Emily Bergsland
Article

Abstract

Objective

To evaluate a simultaneous PET/MRI approach to imaging patients with neuroendocrine tumor using a combination of 68Ga-DOTA-TOC as a PET contrast agent and gadoxetate disodium as a hepatobiliary MRI contrast agent.

Materials and methods

Ten patients with neuroendocrine tumor with known or suspected hepatic disease were imaged using a 68Ga-DOTA-TOC PET/CT immediately followed by a 3.0T time-of-flight PET/MRI, using a combined whole body and liver specific imaging. The presence of lesions and DOTA-TOC avidity were assessed on CT, PET from PET/CT, diffusion weighted imaging, hepatobiliary phase imaging (HBP), and PET from PET/MRI. Maximum standardized uptake values (SUVmax) in hepatic lesions and nodal metastases were compared between PET/CT and PET/MRI, as were detection rates using each imaging approach.

Results

A total of 101 hepatic lesions were identified, 47 of which were DOTA-TOC avid and able to be individually measured on both PET/CT and PET/MRI. HBP imaging had a higher sensitivity for detection of hepatic lesions compared to CT or PET (99% vs. 46% and 64%, respectively; p values <0.001). There was a strong correlation between SUVmax of liver lesions obtained with PET/CT compared to PET/MR imaging (Pearson’s correlation = 0.91). For nodal disease, CT had a higher sensitivity compared to whole body MRI (p = 0.015), although PET acquired from PET/MRI detected slightly more lesions compared to PET from PET/CT.

Conclusions

A simultaneous PET/MRI using both 68Ga-DOTA-TOC and gadoxetate disodium was successful in whole body staging of patients with neuroendocrine tumor. HBP imaging had an increased detection rate for hepatic metastases.

Keywords

Neuroendocrine tumor Hepatobiliary agents PET/MRI Ga-68 DOTA-TOC 

Notes

Acknowledgements

Grant support from Wylie J. Dodds Research Award, Society of Abdominal Radiology, GE Healthcare.

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Copyright information

© Springer Science+Business Media New York (outside the USA) 2015

Authors and Affiliations

  • Thomas A. Hope
    • 1
    • 2
  • Miguel Hernandez Pampaloni
    • 1
  • Eric Nakakura
    • 3
  • Henry VanBrocklin
    • 1
  • James Slater
    • 1
  • Salma Jivan
    • 1
  • Carina Mari Aparici
    • 1
  • Judy Yee
    • 1
    • 2
  • Emily Bergsland
    • 4
  1. 1.Department of Radiology and Biomedical ImagingUniversity of California, San FranciscoSan FranciscoUSA
  2. 2.Department of RadiologySan Francisco VA Medical CenterSan FranciscoUSA
  3. 3.Division of Surgical Oncology, Department of SurgeryUniversity of California, San FranciscoSan FranciscoUSA
  4. 4.Division of Hematology/Oncology, Department of MedicineUniversity of California, San FranciscoSan FranciscoUSA

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