Fig. 1From: Locating hyperfunctioning parathyroid glands using 11C-Choline PET/CT: an inter- and intra-observer variation studyTwo very different 11C-Choline PET/CT images. 11C-Choline positron emission tomography/computed tomography (PET/CT). Arrows mark the suspected hyperfunctioning parathyroid gland. Left: Image deemed of ‘high certainty’ by all three readers. Right: Image deemed of ‘low certainty’ by the expert reader (no images were deemed of low quality by all three readers). In the image to the right, choline uptake in the thyroid and salivary glands is clearly seenBack to article page