Ultrafast cadmium-zinc-telluride-based renal single-photon emission computed tomography: clinical validation

Area of Science:

• Nuclear medicine
• Pediatric imaging
• Radiopharmaceuticals

Background:

• ^99mtechnetium-dimercaptosuccinic acid (DMSA) scans are crucial for pediatric renal imaging.
• Long acquisition times are a significant limitation, impacting patient comfort and workflow.

Purpose of the Study:

• To assess the feasibility of reducing DMSA scan times using cadmium-zinc-telluride-based SPECT.
• To evaluate the impact of shortened acquisition times on image quality and diagnostic accuracy in children.

Main Methods:

• Retrospective analysis of 27 pediatric DMSA SPECT scans.
• Simulated reduced SPECT acquisition times (15, 10, 5, and 2.5 minutes).
• Comparison of image quality, semi-quantification reproducibility, and scintigraphic pattern reproducibility between planar and reduced-time SPECT.

Main Results:

• Image quality scores were comparable for planar and 15-minute SPECT, with slight decreases at 10 and 5 minutes.
• Inter-observer agreement (Kappa coefficients) remained high (>0.83) for most reduced SPECT times.
• The 5-minute SPECT acquisition demonstrated acceptable quality and reproducibility.

Conclusions:

• Shortening SPECT acquisition times for DMSA scans to 5 minutes is feasible in pediatric patients.
• Reduced acquisition times minimally impact image quality and reproducibility.
• This optimization can improve efficiency in pediatric nuclear medicine.