Table 2.

Summary of the types of implanted medical materials, presence of artefacts in positron emission tomography (PET)/MRI and PET/CT and their effects on the estimation of ¹⁸F-fludeoxyglucose (¹⁸F-FDG) PET uptake based on qualitative assessment

Patient number	Implanted device type	Presence of artefact			Effect on [18F]-FDG uptake estimation
		CT	MRI	MRAC	PETCTAC	PETMRAC
1	Dental	+	+	−	↓	↓
2	Dental	+	+	+	↑	↓
4	Dental	+	−	−	−	−
4	Dental	+	−	−	−	−
5	Dental	+	+	+	↑	↓
5	Dental	+	−	−	↑	−
6	Dental	+	−	−	↑	−
6	Dental	+	+	+	↑	↓
7	Dental	+	+	+	↑	↓
7	Dental	+	+	+	↑	↓
8	Dental	+	+	+	↑	↓
8	Dental	+	−	−	↑	−
9	Dental	+	−	−	↑	−
9	Dental	+	−	−	↑	−
10	Dental	+	+	+	↑	↓
11	Dental	+	+	+	↑	↓
11	Dental	+	+	+	↑	↓
11	Dental	+	−	−	−	−
12	Dental	+	+	+	↑	↓
12	Dental	+	+	+	↑	↓
1	Injection port	+	+	+	↑	↓
5	Injection port	+	+	+	↓	↓
6	Injection port	+	+	−	↑	↓
11	Hip prosthesis	+	+	+	↑	↓
11	Hip prosthesis	+	+	+	↑	↓
12	Hip prosthesis	+	+	+	↑	↓
8	Sternal cerclage	+	+	+	↑	↓

MRAC, MRI-based attenuation correction; PET_CTAC, CT-based attenuation-corrected PET; PET_MRAC, MR-based attenuation-corrected PET.

+, yes; −, no; ↓, underestimation of [¹⁸F]-FDG uptake; ↑, overestimation of [¹⁸F]-FDG uptake.