18F-FDG Uptake in Noninfected Prosthetic Vascular Grafts: Incidence, Patterns, and Changes over Time

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FIGURE 1.
A 65-y-old man with leiomyosarcoma, 3 y after insertion of femoro-femoral Gore-Tex graft. Coronal CT (A), PET (B), and PET/CT (B) slices demonstrate diffuse homogeneous ¹⁸F-FDG uptake along graft (arrows), with SUVmean of 1.1.
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FIGURE 2.
An 82-y-old man with newly diagnosed laryngeal cancer, 16 y after implant of aorto-bifemoral Dacron graft. Coronal PET slices demonstrate inhomogeneous ¹⁸F-FDG uptake along whole graft, with SUVmean of 2.5 (arrows).
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FIGURE 3.
Relationship between SUV-G/SUV-M in each graft to time duration from prosthesis insertion surgery in 7 native vein grafts (A), in 67 Dacron grafts (B), and in 33 Gore-Tex grafts (C).

TABLE 1

¹⁸F-FDG Uptake Patterns and SUVmean Measurements in 107 Vascular Grafts

Graft type	Dacron	Gore-Tex	Native vein grafts
No. of grafts	67	33	7
Homogeneous uptake pattern	36	28	3
Inhomogeneous uptake pattern	29	2	0
No ¹⁸F-FDG uptake	2	3	4
Focal uptake pattern	0	0	0
Average SUV-G^*	2.35	1.09	1.07
Average SUV-G/SUV-M^†	1.72	0.91	0.75

↵* Average SUV-G (SUVmean measured in grafts).
↵† Average SUV-G/SUV-M generated by ratio of SUVmean in each graft to SUVmean measured in patient’s mediastinal area.