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Figure 2 | Radiation Oncology

Figure 2

From: SPECT/CT lymphoscintigraphy of sentinel node(s) for superselective prophylactic irradiation of the neck in cN0 head and neck cancer patients: a prospective phase I feasibility study

Figure 2

Inaccuracy in node level localization due to variations in head position. For patient 7, the correct localization of the sentinel node on simulation CT (B) was based on vascular calcifications on SPECT/CT (A) (white arrows). The discordance between SPECT/CT (level 2) and simulation CT (level 3) is due to uncontrolled position of the head for SPECT/CT acquisition and subsequent relative position of hyoid bone (dotted red line, C and D).

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