Which nuclear medicine imaging uses tomographic imaging to evaluate the parathyroid and thyroid gland for malignancy?

Which nuclear medicine imaging uses tomographic imaging to evaluate the parathyroid and thyroid gland for malignancy?

• A. Scintigraphy
• B. SPECT
• C. PET
• D. Ultrasound

Answer: (B)

Tomographic nuclear imaging that provides 3D localization is done with SPECT. In thyroid and parathyroid workups, SPECT acquires multiple angles with a gamma camera and reconstructs cross-sectional images, letting clinicians localize abnormal tissue in three dimensions. This improves the ability to distinguish parathyroid adenomas or thyroid nodules from surrounding tissues and assess malignant involvement when using appropriate radiotracers like sestamibi. Planar scintigraphy offers only 2D views, and ultrasound, while useful anatomically, does not assess function. PET is also tomographic but is not the standard first-line modality for this specific thyroid/parathyroid evaluation.

Tomographic nuclear imaging that provides 3D localization is done with SPECT. In thyroid and parathyroid workups, SPECT acquires multiple angles with a gamma camera and reconstructs cross-sectional images, letting clinicians localize abnormal tissue in three dimensions. This improves the ability to distinguish parathyroid adenomas or thyroid nodules from surrounding tissues and assess malignant involvement when using appropriate radiotracers like sestamibi. Planar scintigraphy offers only 2D views, and ultrasound, while useful anatomically, does not assess function. PET is also tomographic but is not the standard first-line modality for this specific thyroid/parathyroid evaluation.