ArticleJournal of applied clinical medical physics2024
A novel AP/PA total body irradiation technique using abutting IMRT fields at extended SSD.
Article in Journal of applied clinical medical physics, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 8 citations in OpenAlex.
- A hybrid deep learning framework for automated treatment planning in cervical cancer radiotherapy.Journal of applied clinical medical physics · 2026Article
- Comparative dosimetric analysis of base dose and gradient-based optimization in overlapping regions of extended target volumes using an anthropomorphic phantom.Radiological physics and technology · 2025Article
- Feasibility of segmental total body irradiation (SegTBI) using a 1.5T MR-linac.Journal of applied clinical medical physics · 2025Article
- A novel AP/PA total body irradiation technique using abutting IMRT fields at extended SSD.Journal of applied clinical medical physics · 2024Article
- Validation of Treatment Planning Systems based on Dose Calculation Accuracy for Extended SSD Total Body Irradiation with and without Beam Spoiler.Journal of medical physicsArticle
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Authors and funding
3 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeTo develop a Total Body Irradiation (TBI) technique using IMRT at extended SSD that can be performed in any size Linac room.
methodsPatients studied were placed on a platform close to the floor, directly under the gantry with cranial-caudal axis parallel to the gantry rotation plane and at SSD ∼200 cm. Two abutting fields with the same external isocenter at gantry angles of ±21˚, collimator angle of 90˚, and field size of 25 × 40 cm
resultsA uniform dose distribution in the mid-plane within ±5% of the prescription dose was reached after a few iterations. This was confirmed with ion-chamber measurements in phantom. The mean dose to lungs and kidneys can be adjusted according to clinical requirements and can be as low as ∼25% of the prescription dose. For a typical prescription dose of 200 cGy/fraction, the total MU was ∼2400/1200 for the superior/inferior field. The overall treatment time for both supine/prone positions was ∼54 min to meet the maximum absorbed dose rate criteria of 15 cGy/min. IMRT QA with portal dosimetry shows excellent agreement.
conclusionsWe have developed a promising TBI technique using abutting IMRT fields at extended SSD. The patient is in a comfortable recumbent position with good reproducibility and less motion during treatment. An additional benefit of this technique is that full 3D dose distribution is available from the TPS with a DVH summary for organs of interest. The technique allows precise sparing of lungs and kidneys and can be executed in any linac room.
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