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EJNMMI Research

Table 2 SLN radioactive decay for each of the five cases in this study. In the three cases shaded, less than 15% of the SLN activity present at lymphoscintigraphy remained at probe fhSPECT or camera fhSPECT imaging

From: Evaluation of camera-based freehand SPECT in preoperative sentinel lymph node mapping for melanoma patients

Case #

Injected activity (MBq)

Injection—LS time (hrs)

Injection—3D scanning time (hrs)

Fraction of injected activity remaining at LS

Fraction of injected activity remaining at 3D scans

3

18.5

0.25

19.7

0.97

0.10

4

20.4

0.25

3.1

0.97

0.70

5

18.9

0.25

18.4

0.97

0.12

6

20.4

0.25

22.7

0.97

0.07

7

18.5

0.25

4.4

0.97

0.60

  1. The two 3D scans (camera fhSPECT and probe fhSPECT) were performed with no lapsed time between them, so their injection-to-scan time was identical). LS = lymphoscintigraphy; 3D scans = camera fhSPECT and (when performed) probe fhSPECT
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