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Comparison of Cone-Beam Tomography and Cross-Sectional Imaging for Volumetric and Dosimetric Calculations in Resin Yttrium-90 Radioembolization

  • Marco Ertreo
  • Hailey Choi
  • David Field
  • Jonathan W. Lischalk
  • Emil Cohen
  • George E. Lynskey
  • Theresa Caridi
  • Donna Buckley
  • Keith Unger
  • Alexander Y. Kim
Clinical Investigation Interventional Oncology
Part of the following topical collections:
  1. Interventional Oncology

Abstract

Purpose

To compare the use of cone-beam computed tomography versus contrast-enhanced computed tomography (CT) and magnetic resonance imaging (MRI) in the calculation of liver volume and planned dose for yttrium-90 radioembolization.

Materials and Methods

The study retrospectively assessed 47 consecutive patients who underwent resin Y-90 radioembolization consecutively over a 2-year period at a single center. Volume calculation software was used to determine perfused lobar liver volumes from cone-beam CT (CBCT) images obtained during mapping angiography. CBCT-derived volumes were compared with perfused lobar volume derived from contrast-enhanced CT and MRI. Nominal activities as determined by the SIR-Spheres Microspheres Activity Calculator were similarly calculated and compared using both CBCT and conventionally acquired volumes.

Results

A total of 82 hepatic lobes were assessed in 47 patients. The mean percentage difference between combined CT-MRI- and CBCT-derived calculated lobar volumes was 25.3% (p = 0.994). The mean percentage difference in calculated dose between the two methods was 21.8 ± 24.6% (p = 0.42). Combined left and right lobar CT-derived dose difference was less than 10% in 22 lobes, between 10 and 25% in 20 lobes, between 25 and 50% in 13 lobes and greater than 50% in 5 lobes. Combined left and right lobar MRI-derived dose difference was less than 10% in 11 lobes, between 10 and 25% in 7 lobes, between 25 and 50% in 2 lobes and greater than 50% in 1 lobe.

Conclusions

Although volume measurements derived from CT/MRI did not differ significantly from those derived from CBCT, variability between the two methods led to large and unexpected differences in calculated dose.

Keywords

Cone-beam CT CBCT Y90 Radioembolization Dosimetry 

Notes

Compliance with Ethical Standards

Conflict of interest

All the authors declared that they have no conflict of interest.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature and the Cardiovascular and Interventional Radiological Society of Europe (CIRSE) 2018

Authors and Affiliations

  1. 1.Division of Interventional Radiology, Department of RadiologyMedstar Georgetown University HospitalWashingtonUSA
  2. 2.Department of Radiation OncologyMedstar Georgetown University HospitalWashingtonUSA

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