Janssen J, Brouwer CL, Staal FH, van Herpt HE, Both S, Langendijk JA, Aluwini S. Simple immobilization for stereotactic radiotherapy aimed at pelvic metastases.
Phys Imaging Radiat Oncol 2023;
27:100460. [PMID:
37435559 PMCID:
PMC10331836 DOI:
10.1016/j.phro.2023.100460]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 06/15/2023] [Accepted: 06/15/2023] [Indexed: 07/13/2023] Open
Abstract
Stereotactic body radiotherapy (SBRT) is increasingly applied for pelvic oligometastases of prostate cancer, and currently no simple immobilization method is available for cone beam computed tomography (CBCT)-guided treatment. We assessed patient set-up and intrafraction motion using simple immobilization during CBCT-guided pelvic SBRT. Forty patients were immobilized with basic arm- head- and knee support and either a thermoplastic cushion or a foam cushion. Analysis of 454 CBCTs showed mean intrafraction translation <3.0 mm in 94% of fractions and mean intrafraction rotation <1.5° in 95% of fractions. Therefore, simple immobilization ensured stable patient positioning during CBCT-guided pelvic SBRT.
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