Medium energy general purpose collimators (MEGP) are superior over low energy high resolution (LEHR) collimators for I123 imaging

Objectives Recent practice in the nuclear medicine world finds many facilities performing I123 imaging on LEGP collimators. This study seeks to determine whether the practice of using LEHR collimators instead of MEGP collimators for I123 Imaging is an optimal technique.

Methods Images of I123 MIBG and I123 NaI Static, WB and phantom images were obtained each directly compared image for the same amount of time. These were reviewed by the Nuclear Medicine Physician and Technologist Staff for feedback regarding better body to background appearance, more clearly defined areas of increased uptake and better contrast and overall appearance in regards to reading for dictation and technical quality control.

Results The images obtained on the MEGP collimators were overwhelmingly chosen as the more optimal images when graded according to the factors.

Conclusions Facilities that perform I123 Imaging would better serve their patients by acquiring MEGP collimators for I123 Imaging. The practice of acquiring I123 Images on LEHR collimators does not allow for optimal imaging of I123.