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Effect of tumour involvement on activity determination of resin Yttrium-90 in selective internal radiation therapy of metastatic liver cancer

Published online by Cambridge University Press:  29 September 2022

Jun Li Open the ORCID record for Jun Li [Opens in a new window] ,
Yan Yu  and
Rani Anne
Jun Li*
Affiliation:
Department of Radiation Oncology, Thomas Jefferson University, Philadelphia, PA 19107, USA
Yan Yu
Affiliation:
Department of Radiation Oncology, Thomas Jefferson University, Philadelphia, PA 19107, USA
Rani Anne
Affiliation:
Department of Radiation Oncology, Thomas Jefferson University, Philadelphia, PA 19107, USA
*
Author for correspondence: Jun Li, Department of Radiation Oncology, Thomas Jefferson University, 111 South 11th Street, Philadelphia, PA 19107, USA. E-mail: Jun.Li@jefferson.edu
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Abstract

Introduction:

The study was aimed to evaluate the effect of tumour involvement on resin Yttrium-90 (Y90) activity determination for metastatic liver cancer treatment.

Methods:

One hundred and two cases of resin Y90 microsphere treatment were retrospectively studied. Body surface area (BSA) method was used in the calculation of resin Y90 activity. The total activity (TA) was calculated as a summation of activities obtained from BSA-based calculation and tumour involvement (TI). TI and TA of each case were evaluated. The contributions of TI to TA were calculated with the ratio of TI/TA.

Results:

The average contribution of TI to TA was 4·1%. The contributions were < 5·8% in 75% of the cases, < 2·2% in 50% of the cases and < 1·0% in 25% of the cases.

Conclusions:

Overall the effect of tumour involvement on the activity determination was small. The activity calculation could be simplified by neglecting TI in 25% of the cases where the activity contribution from TI was less than 1%. Contouring tumour and liver structures for TI calculation could be avoided in these cases, and the efficiency of the workflow for resin Y90 procedures could be improved.

Keywords

resin Yttrium-90activityBSA methodtumor involvement
Type
Technical Note
Information
Journal of Radiotherapy in Practice , Volume 22 , 2023 , e58
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Copyright
© The Author(s), 2022. Published by Cambridge University Press

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