Article (Scientific journals)
Inter-observer variability of 90Y PET/CT dosimetry in hepatocellular carcinoma after glass microspheres transarterial radioembolization
Meyers, Nicolas; JADOUL, Alexandre; BERNARD, Claire et al.
2020In EJNMMI Research
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Keywords :
Radioembolization; Hepatocarcinoma; Dosimetry; Microspheres; Reproducibility
Abstract :
[en] Introduction: Strong correlation has been demonstrated between tumor dose and response and between healthy liver dose and side effects. Individualized dosimetry is increasingly recommended in the current clinical routine. However, hepatic and tumor segmentations could be complex in some cases. The aim of this study is to assess the reproducibility of the tumoral and non-tumoral liver dosimetry in selective internal radiation therapy (SIRT). Material and methods: Twenty-three patients with hepatocellular carcinoma (HCC) who underwent SIRT with glass microspheres were retrospectively included in the study. Tumor (TV) and total liver volumes (TLV), and mean absorbed doses in tumoral liver (TD) and non-tumoral liver (THLD) were determined on the 90Y PET/CT studies using Simplicit90YTM software, by three independent observers. Dosimetry datasets were obtained by a medical physicist helped by a nuclear medicine (NM) physician with 10 years of experience (A), by a NM physician with 4-year experience (B), and by a resident who first performed 10 dosimetry assessments as a training (C). Inter-observer agreement was evaluated using intra-class correlation coefficients (ICC), coefficients of variation (CV), Bland-Altman plots, and reproducibility coefficient (RDC). Results: A strong agreement was observed between all three readers for estimating TLV (ICC 0.98) and THLD (ICC 0.97). Agreement was lower for TV delineation (ICC 0.94) and particularly for TD (ICC 0.73), especially for the highest values. Regarding TD, the CV (%) was 26.5, 26.9, and 20.2 between observers A and B, A and C, and B and C, respectively, and the RDC was 1.5. Regarding THLD, it was 8.5, 12.7, and 9.4, and the RDC was 1.3. Conclusion: Using a standardized methodology, and regardless of the different experiences of the observers, the estimation of THLD is highly reproducible. Although the reproducibility of the assessment of tumor irradiation is overall quite high, large variations may be observed in a limited number of patients.
Disciplines :
Radiology, nuclear medicine & imaging
Author, co-author :
Meyers, Nicolas ;  Centre Hospitalier Universitaire de Liège - CHU > Département de Physique Médicale > Service médical de médecine nucléaire et imagerie onco
JADOUL, Alexandre ;  Centre Hospitalier Universitaire de Liège - CHU > Département de Physique Médicale > Service médical de médecine nucléaire et imagerie onco
BERNARD, Claire ;  Centre Hospitalier Universitaire de Liège - CHU > Département de Physique Médicale > STA Physique et informatique - Médecine nucléaire
DELWAIDE, Jean ;  Centre Hospitalier Universitaire de Liège - CHU > Département de médecine interne > Service de gastroentérologie, hépatologie, onco. digestive
LAMPROYE, Anne ;  Centre Hospitalier Universitaire de Liège - CHU > Département de médecine interne > Service de gastroentérologie, hépatologie, onco. digestive
DETRY, Olivier  ;  Centre Hospitalier Universitaire de Liège - CHU > Département de chirurgie > Chirurgie abdo, sénologique, endocrine et de transplantation
HONORE, Pierre ;  Centre Hospitalier Universitaire de Liège - CHU > Département de chirurgie > Chirurgie abdo, sénologique, endocrine et de transplantation
GERARD, Laurent ;  Centre Hospitalier Universitaire de Liège - CHU > Département de Physique Médicale > Service médical de radiodiagnostic
HUSTINX, Roland  ;  Centre Hospitalier Universitaire de Liège - CHU > Département de Physique Médicale > Service médical de médecine nucléaire et imagerie onco
Language :
English
Title :
Inter-observer variability of 90Y PET/CT dosimetry in hepatocellular carcinoma after glass microspheres transarterial radioembolization
Publication date :
2020
Journal title :
EJNMMI Research
eISSN :
2191-219X
Publisher :
Springer, Germany
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 14 October 2020

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