BACKGROUND AND PURPOSE: The goal of this study was to improve target definition by deriving modality-specific margins for clinical target volumes (CTV) for laryngeal and hypopharyngeal cancer on CT, MRI and 18-FDG-PET. MATERIAL AND METHODS: Twenty-five patients with T3/T4 laryngeal/hypopharyngeal cancer underwent CT, MRI and 18-FDG-PET scans before laryngectomy. HE-sections were obtained from the surgical specimen and tumor was delineated (tumorHE). The GTVs on CT and MRI were delineated in consensus. PET-based GTVs were automatically segmented. The three-dimensionally reconstructed specimen was registered to the various images. Modality-specific CTV margins were derived and added to the GTVs to achieve adequate tumor coverage. The resulting CTVs were compared with each other, to tumorHE, and to CTVCT10 constructed on CT with the clinical margin of 10mm. RESULTS: CTV margins of 4.3mm (CT), 6.1mm (MRI) and 5.2mm (PET) were needed to achieve adequate tumor coverage. The median volumes of the resulting modality-specific CTVs were 44ml (CT), 48ml (MRI) and 39ml (PET), while the CTV10mm was 80ml. CONCLUSION: For laryngohypopharyngeal tumors, 45-52% target volume reduction compared with CTV10mm is achievable when modality-specific CTV margins are used. PET-based CTVs were significantly smaller compared to CT- and MRI-based CTVs.
BACKGROUND AND PURPOSE: The goal of this study was to improve target definition by deriving modality-specific margins for clinical target volumes (CTV) for laryngeal and hypopharyngeal cancer on CT, MRI and 18-FDG-PET. MATERIAL AND METHODS: Twenty-five patients with T3/T4 laryngeal/hypopharyngeal cancer underwent CT, MRI and 18-FDG-PET scans before laryngectomy. HE-sections were obtained from the surgical specimen and tumor was delineated (tumorHE). The GTVs on CT and MRI were delineated in consensus. PET-based GTVs were automatically segmented. The three-dimensionally reconstructed specimen was registered to the various images. Modality-specific CTV margins were derived and added to the GTVs to achieve adequate tumor coverage. The resulting CTVs were compared with each other, to tumorHE, and to CTVCT10 constructed on CT with the clinical margin of 10mm. RESULTS: CTV margins of 4.3mm (CT), 6.1mm (MRI) and 5.2mm (PET) were needed to achieve adequate tumor coverage. The median volumes of the resulting modality-specific CTVs were 44ml (CT), 48ml (MRI) and 39ml (PET), while the CTV10mm was 80ml. CONCLUSION: For laryngohypopharyngeal tumors, 45-52% target volume reduction compared with CTV10mm is achievable when modality-specific CTV margins are used. PET-based CTVs were significantly smaller compared to CT- and MRI-based CTVs.
Authors: Rosie J Goodburn; Marielle E P Philippens; Thierry L Lefebvre; Aly Khalifa; Tom Bruijnen; Joshua N Freedman; David E J Waddington; Eyesha Younus; Eric Aliotta; Gabriele Meliadò; Teo Stanescu; Wajiha Bano; Ali Fatemi-Ardekani; Andreas Wetscherek; Uwe Oelfke; Nico van den Berg; Ralph P Mason; Petra J van Houdt; James M Balter; Oliver J Gurney-Champion Journal: Magn Reson Med Date: 2022-09-21 Impact factor: 3.737
Authors: Mischa de Ridder; Cornelis P J Raaijmakers; Frank A Pameijer; Remco de Bree; Floris C J Reinders; Patricia A H Doornaert; Chris H J Terhaard; Marielle E P Philippens Journal: Cancers (Basel) Date: 2022-06-20 Impact factor: 6.575
Authors: Carlos E Cardenas; Sanne E Blinde; Abdallah S R Mohamed; Sweet Ping Ng; Cornelis Raaijmakers; Marielle Philippens; Alexis Kotte; Abrahim A Al-Mamgani; Irene Karam; David J Thomson; Jared Robbins; Kate Newbold; Clifton D Fuller; Chris Terhaard Journal: Int J Radiat Oncol Biol Phys Date: 2022-02-04 Impact factor: 8.013
Authors: Hans Ligtenberg; Tim Schakel; Jan Willem Dankbaar; Lilian N Ruiter; Boris Peltenburg; Stefan M Willems; Nicolien Kasperts; Chris H J Terhaard; Cornelis P J Raaijmakers; Marielle E P Philippens Journal: Cureus Date: 2018-04-11
Authors: Hans Ligtenberg; Stefan M Willems; Lilian N Ruiter; Elise Anne Jager; Chris H J Terhaard; Cornelis P J Raaijmakers; Marielle E P Philippens Journal: Clin Transl Radiat Oncol Date: 2018-07-11
Authors: Tim Schakel; Boris Peltenburg; Jan-Willem Dankbaar; Carlos E Cardenas; Michalis Aristophanous; Chris H J Terhaard; Johannes M Hoogduin; Marielle E P Philippens Journal: Phys Imaging Radiat Oncol Date: 2018-01-30