Table 1 Gamma probe-guided surgery protocol for Tc-99m MAA
From: A multimodality localization technique for radio-guided surgery
Tc-99m MAA Lesion Localization with image/endoscopy guidance | |
|---|---|
Radiopharmaceutical Dose/Administration | • Tc-99m MAA • 0.1 mCi (.0037 MBq)/direct injection |
Standard Imaging Protocol | • No nuclear medicine imaging needed |
Timing of Surgical Exploration | • Within 6 h post-injection |
Patient Preparation | • Not required |
Gamma Probe | • Standard medium-energy gamma probe |
System set-up | • Analyzer Settings: Photopeak: 140 keV, Window: 20%, Threshold: 136 keV (In commercial systems this is a default setting) • Verify calibration and settings of the system • Cover the probe with sterile plastic sleeve |
Intra-operative Use | • Probe survey at counts- per-second mode (Dynamic pitch range feed-back helpful) • Hot-spot confirmation with TBR>1.5 at 10-second count mode (TBR ratio feed-back helpful) Avoid simultaneous electrocautery use |