Radionuclide Localization > Steps > Step 8

Step 8

Coaxial technique and CT-guidance for radiotracer injection:

1. A 19 gauge outer needle is placed into the subcutaneous tissues in the intercostal space in alignment with the nodule.

           

 

2. A 22-gauge spinal needle passed through the outer needle is then advanced into or immediately adjacent to the nodule using CT guidance.

           

 

3. The needle may have to be repositioned one or more times with subsequent CT imaging after each change in position for optimal placement. Our experience has shown that the injected radionuclide need only be in very close proximity to, not necessarily truly within, the nodule for technical success. In fact, injecting slightly deep rather than superficial to the nodule is preferential.

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