4D SPECT/CT: A Hybrid Approach to Primary Hyperparathyroidism

Area of Science:

• Endocrinology
• Radiology
• Nuclear Medicine

Background:

• Primary hyperparathyroidism (PHPT) management relies on accurate preoperative localization of hyperfunctioning parathyroid glands.
• Traditional imaging modalities like ultrasound and SPECT/CT have limitations in complex patient profiles.

Purpose of the Study:

• To review current imaging options for PHPT.
• To advocate for the judicious use of 4-dimensional (4D) SPECT/CT in select patients.
• To propose an optimized imaging scheme integrating traditional methods with 4D SPECT/CT.

Main Methods:

• Review of advantages and disadvantages of ultrasound, SPECT, and 4D CT for PHPT.
• Development of an imaging scheme based on patient criteria (e.g., large body habitus, multiglandular disease, prior surgery).
• Integration of expert input from radiologists, endocrinologists, and surgeons.

Main Results:

• 4D SPECT/CT combines strengths of SPECT and 4D CT, overcoming individual modality limitations.
• The proposed imaging paradigm utilizes 4D SPECT/CT for cost-effective, accurate localization.
• This approach limits radiation exposure while improving diagnostic accuracy in challenging cases.

Conclusions:

• 4D SPECT/CT offers improved accuracy for preoperative parathyroid gland localization in PHPT patients with complex clinical parameters.
• An individualized imaging strategy incorporating 4D SPECT/CT is effective and cost-efficient.
• Judicious use of 4D SPECT/CT enhances preoperative assessment for challenging PHPT cases.