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EJNMMI Physics

Table 3 Lesion characteristics

From: Comparing lesion detection efficacy and image quality across different PET system generations to optimize the iodine-124 PET protocol for recurrent thyroid cancer

Lesion ID

AR

Size (mm)

SUVmax

mMR

20-min

SUVmax

Vision

OSEM-TOF

ACmax

mMR 20-min

(kBq/mL)

ACmax

Vision OSEM-TOF

(kBq/mL)

SBR

mMR

20-min

1

CLN

13

15.2

14.0

4,6

4.2

42.6

2

CLN

17

8.8

9.9

2.6

3.5

25.7

3

CLN

9

3.1

3.4

0.9

1.0

10.7

4

CLN

7

2.3

–

0.8

–

12.6

5

Bone

< 6

8.4a

3.1

3.2a

1.2

14.4

6

TB

16

10.2

9.9

4.7

4.6

29.6

7

CLN

6

3.0

2.2

1.4

1.0

8.4

8

TB

<6

5.6

5.1

2.4

2.8

7.1

9

CLN

4

3.0

1.8

1.3

0.9

6.5

  1. AR Anatomical region, CLN Cervical lymph node, TB Thyroid bed, SBR Signal-to-background ratio (only reported for the 20-min acquisition on the mMR, in which all lesions were detectable)
  2. aPotentially artificially elevated activity concentration in PET/MR attenuation correction, as the bone lesion was osteolytic
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