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Fig. 2 | Cancer Imaging

Fig. 2

From: Diagnostic performance of 18F-FDG PET/CT using point spread function reconstruction on initial staging of rectal cancer: a comparison study with conventional PET/CT and pelvic MRI

Fig. 2

A 83-year-old woman with rectal cancer. The rectal cancer (arrowhead) can be seen from 18F-FDG uptake on both PSF-PET/CT (a) and conventional PET/CT (b) [images are scaled to the same maximum value]. A obturator lymph node (arrow) showed as 18F-FDG avid compared to the surrounding tissue on PSF-PET/CT, and therefore considered a positive result. This lymph node was obscure on conventional PET/CT, and thus regarded as negative. This lymph node was 5 mm in diameter, and did not show mixed signal intensity nor irregular contour on the high resolution T2-weighted image (c), and therefore considered negative on MRI also. Subsequently, this lymph node was pathologically confirmed as containing metastasis

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Cancer Imaging

ISSN: 1470-7330

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