139. Parallel-opposed fields vs. four fields, and two- (2D) vs. three-dimensional (3D) radiotherapy planning in thin patients with gynecological malignancies

Conventional radiotherapy planning of cervical cancer in resource-constrained set-up: Utilizing soldering lead wire to delineate radiotherapy portal

“…Following were the factors behind our decision to treat selected patients of carcinoma cervix through standard AP/PA pelvic portal using the aforementioned technique in the present study. Dosimetric studies have demonstrated that CTV was better covered by 3D-CRT than with conventional technique ( Bednaruk-Młyński et al, 2003 , Bednaruk-Młynski et al, 2008 ). Nevertheless, clinical outcome of 2-D radiotherapy technique was statistically non-inferiority and the clinical implementation was simpler as compared to that of 3D-CRT.…”

“…9 ). However, multiple studies have demonstrated the weakness of conventional 4-field box technique with respect to target coverage especially by lateral pelvic portal ( Bednaruk-Młyński et al, 2003 , Kim et al, 1994 ) Para-aortic lymph nodal area Kidneys on either side of para-aortic lymph nodal area (right L1-3 and left T12-L2 in supine position) precludes use of lateral portals. Para-aortic area is near the centre of transverse axis of abdomen ( Iwanaga et al, 2018 , Busscher et al, 2010 ).…”

Emostatic-palliative radiotherapy in vescical carcinoma: two case reports

“…Il trattamento primario, previa TC di centratura, ha previsto l'irradiazione dell'intera vescica utilizzando fotoni X6 Mv da acceleratore lineare e tecnica box 3D conformazionale (9); sono stati erogati 20 Gy in 5 frazioni giornaliere ognuna di 4 Gy.…”

Reconstruction of 3D lung models from 2D planning data sets for Hodgkin's lymphoma patients using combined deformable image registration and navigator channels

“…3,5 Conversely, 3D CT-based RT planning is a relatively new innovation, such that there is currently insufficient sample of late complication patients with 3D-treatment plans. Numerous recent studies on conformal RT have compared dosimetric outcomes of 2D and 3D treatment plans by reconstructing 2D plans from existing 3D treatment plans for various head and neck, 6 prostate, 7,8 and gynecological 9 malignancies. However, to date, no study has attempted to construct 3D organ volumes directly from historical 2D planning images, especially not for the treatment of HL.…”