Table 2. Quality of Surveillance PET and PET-CT studies.

Study	Prospective study design?	Clear eligibility criteria?	Selection bias likely?	Index and reference tests adequately described?	Blinded outcome assessment?	Clear reporting with no discrepancies?	Overall grade
PET-CT
Lymphoma
Crocchiolo(22)	No	Yes	No	Yes	No	Yes	B
El-Galaly(23)	No	Yes	No	Yes	No	Yes	B
Lee(21)	No	Yes	Yes	No	No	Yes	C
Rhodes(24)	No	Yes	No	Yes	No	Yes	B
Head and Neck Cancer
Abgral(25)	Yes	Yes	No	Yes	Yes	Yes	A
PET
Lymphoma
Hosein(27)	No	Yes	Yes	Yes	No	Yes	C
Zinzani(26)	Yes	Yes	No	Yes	No	No	B
Head and Neck Cancer
Lowe(29)	Yes	Yes	Yes	Yes	Yes	No	B
Perie(30)	Yes	Yes	Yes	Yes	Yes	Yes	B
Salaun(31)	No	Yes	No	Yes	Yes	Yes	B
Colorectal Cancer
Selvaggi(28)	No	Yes	Yes	Yes	Yes	Yes	C
Sobhani(20)	Yes	Yes	No	Yes	Yes	No	B