Differences in dosimetric parameters between 125I seed implantation with degradable catheters and free-hand / 中华放射医学与防护杂志
Chinese Journal of Radiological Medicine and Protection
;
(12): 62-65, 2021.
Artículo
en Chino
| WPRIM
| ID: wpr-884475
ABSTRACT
Objective:
To compare the differences in dosimetric parameters of target areas between 125I seed implantation with degradable catheters and by hand under the assistance of a real-time intraoperative treatment planning system (TPS).Methods:
Forty-two simulated lesions were divided into a degradable catheter group and a free-hand group, with twenty-one lesions in each group. 125I seeds were implanted according to the TPS.The pre-plan and post-implant dosimetric parameters were collected, including the minimum dose ( Dmin), maximum dose ( Dmax), mean dose ( Dmean), conformal index (CI), external index (EI), homogeneity index (HI), minimum prescription dose delivered to 90% of the target volume ( D90), and the mean percentage of volume receiving 90% of the prescription doses ( V90). The Bland-Altman method was employed to analyze the consistency of pre-plan and post-implant dosimetric parameters and the Wilcoxon rank-sum test was used for the comparison of the two groups.Results:
According to the Bland-Altman analysis, the dosimetric parameters of the two groups were all in agreement before and after seed implantation except for the Dmin and V90 of the free-hand group.Furthermore, the degradable catheter group had smaller error ranges of Dmax ( Z=-3.824, P<0.005), CI ( Z=-1.962, P<0.005), HI ( Z=-2.352, P<0.005), D90 ( Z=-2.453, P<0.005), and V90 ( Z=-3.159, P<0.005).Conclusions:
The dosimetric parameters of 125I seed implantation with degradable catheters under the assistance of real-time TPS have good pre-plan and post-implant consistency and smaller error ranges.
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Idioma:
Chino
Revista:
Chinese Journal of Radiological Medicine and Protection
Año:
2021
Tipo del documento:
Artículo
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