14 Nasopharynx Cancer

Nasopharynx Cancer

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THE GEC ESTROHANDBOOKOF BRACHYTHERAPY | Part II Clinical Practice Version 1 - 10/09/2019

Figure 10. Typical isodoses associated with the paediatric endotracheal tube technique with cesium 137 slugs. Left, lateral view; Right, anteroposterior view. [Wang, 1987]

Figure 11. Balloon applicator with 3-cc balloon. Modified cuffed paedriatic endotracheal tube with more slender catheters to allow for greater patient comfort. [Slevin, 1997]

Figure 12. Sagittal MR T1-weighted image of balloon applicator in-situ , inflated with 4mL diluted Gadolinium contrast. [Slevin, 1997]

Figure 14. Retrograde naso-oropharyngeal insertion of a pre-fabricated nasopharyngeal applicator. Top: Silicon feeding tubes inserted transnasally, through the naso-oropharyngeal passage, into the mouth and attached and secured into the nasal limbs of the applicator. Bottom: The applicator maneuvered into the nasopharyngeal cavity by traction onto the feeding tubes.

Figure 13. Rotterdam nasopharyngeal applicator. A, Old-type Rotterdam nasopharyngeal applicator (RNA); B, New-type RNA, with flanges of both catheters tilted more sideways to allow more lateral dosimetric coverage of the parapharyngeal space. This newer version was never released commercially for clinical use. [Levendag, 2013]