PMC8484323_01
Lara device consists of 2 scintillation sensors, a reader, and a docking station (A). Sensors placed on injection arm and reference arm (B).
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F1
In our center, we monitor radiopharmaceutical injection quality using the Lara  System (Lucerno Dynamics, Cary, NC), consisting of two external scintillating detectors, a reader to collect and store data, a docking station, software to transfer data, and a web application to display and analyze data (Figure 1).
The first TAC (A) shows the patient's administration with 99mTc-MDP. A zoomed-in view of this same TAC (B) more clearly shows the dramatic difference between the counts from the injection arm sensor curve (black line) and the counts from the reference arm sensor curve (red line). The third TAC (C) was acquired from a different patient and shows an ideal administration where the injection arm sensor curve (black line) and the reference arm sensor curve (red line) reached equilibrium within seconds.
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F2
Counts from the sensor on the injection arm, as compared to counts from the reference sensor, indicated a significant presence of excess 99mTc-MDP near the injection site (Figure 2).