A New Method of Total Body Irradiation Using a Field-in-Field Technique

Yamamoto, Hideo; Sugimoto, Seiichiro; Furuya, T.; Hara, Naoya; Fukata, Kyohei; Kojima, Hideo; Ishisugi, S.; Takishita, K.; Miura, K.; Sasai, Keisuke

doi:10.1016/j.ijrobp.2012.07.2280

Cited by 2 publications

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“…This study shows that without using TPS and compensators, homogeneous dose can be achieved with the help of MLC and jaw using MFIF-TBI technique. [ 19 ]…”

Section: Discussionmentioning

confidence: 99%

“…Using computerized FIF technique, homogeneous dose distribution can be achieved within the tolerance limit Different studies have showed that the FIF technique can be successfully employed to achieve homogeneous distribution. [ 18 19 20 ] Many centers do not have high-end treatment machine to plan TBI with Tomotherapy or volumetric-modulated arc therapy (VMAT) treatment technique. The limitation of dose calculation at extended SSD using TPS is also another issue.…”

Section: Introductionmentioning

confidence: 99%

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A phantom study on feasibility of manual field-in-field clinical implementation for total body irradiation and comparison of midplane dose with different bilateral TBI techniques

et al. 2023

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Objective: The aim of this study is to implement a new treatment technique in total body irradiation (TBI) using the manual field-in-field-TBI (MFIF-TBI) technique and dosimetrically verifying its results with respect to compensator-based TBI (CB-TBI) and open field TBI technique. Materials and Methods: A rice flour phantom (RFP) was placed on TBI couch with knee bent position at 385 cm source to surface distance. Midplane depth (MPD) was calculated for skull, umbilicus, and calf regions by measuring separations. Three subfields were opened manually for different regions using the multi-leaf collimator and jaws. The treatment Monitor unit (MU) was calculated based on each subfield size. In the CB-TBI technique, Perspex was used as a compensator. Treatment MU was calculated using MPD of umbilicus region and the required compensator thickness was calculated. For open field TBI, treatment MU was calculated using MPD of umbilicus region, and the treatment was executed without placing compensator. The diodes were placed on the surface of RFP to measure the delivered dose and the results were compared. Results: The MFIF-TBI results showed that the deviation was within ± 3.0% for the different regions, except for the neck for which the deviation was 8.72%. In the CB-TBI delivery, the dose deviation was ± 3.0% for different regions in the RFP. The open field TBI results showed that the dose deviation was not within the limit ± 10.0%. Conclusion: The MFIF-TBI technique can be implemented for TBI treatment as no TPS is required, and laborious process of making a compensator can be avoided while ensuring that the dose uniformity in all the regions within the tolerance limit.

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“…This study shows that without using TPS and compensators, homogeneous dose can be achieved with the help of MLC and jaw using MFIF-TBI technique. [ 19 ]…”

Section: Discussionmentioning

confidence: 99%