Improving the image quality of short-time bone SPECT using cadmium-zinc-telluride detectors with SwiftScan

Area of Science:

• Nuclear Medicine
• Medical Imaging
• Radiology

Background:

• Bone metastases detection relies on SPECT imaging.
• Current SPECT acquisition times can be lengthy.
• Semiconductor cameras offer potential for improved SPECT imaging.

Purpose of the Study:

• To evaluate the impact of SwiftScan on bone SPECT image quality and quantitative values.
• To compare SPECT imaging with and without SwiftScan in patients with bone metastases.
• To determine acceptable scan time reductions using SwiftScan.

Main Methods:

• List-mode SPECT/CT was performed on 10 prostate cancer patients with bone metastases.
• Images were reconstructed with and without SwiftScan at various time percentages (75%, 50%, 25%, 10%, 5%).
• Visual image quality, intraclass correlation coefficient, SUVmax, and CNR were analyzed.

Main Results:

• SwiftScan maintained acceptable image quality (score ≥4) at 75% and 50% scan times, compared to only 75% without SwiftScan.
• Intraclass correlation coefficients were high with SwiftScan (0.990) vs. without (0.952).
• Contrast-to-noise ratios and SUVmax reproducibility were improved with SwiftScan, even at reduced scan times.

Conclusions:

• SwiftScan enables acceptable bone SPECT image quality with a 50% reduction in acquisition time.
• Quantitative indices like SUVmax and CNR are reproducible with SwiftScan.
• This technology enhances efficiency in bone SPECT imaging for metastatic disease.