Suppressing bladder artifacts in bone SPECT of the pelvis

Area of Science:

• Nuclear Medicine
• Radiology
• Medical Imaging

Background:

• Bladder-filling artifacts degrade pelvic bone Single Photon Emission Computed Tomography (SPECT) image quality.
• These artifacts can obscure or mimic pathology, impacting diagnostic accuracy.

Purpose of the Study:

• To evaluate a simple protocol of forced diuresis and intravenous (IV) hydration to eliminate bladder-filling artifacts in pelvic bone SPECT.
• To improve image quality and diagnostic accuracy for pelvic bone SPECT.

Main Methods:

• Thirty patients were divided into two groups: Group I (normal void) and Group II (forced diuresis with IV hydration).
• Pelvic SPECT was performed, and artifacts were analyzed qualitatively and quantitatively using regions of interest (ROIs).
• Image reconstruction was performed using filtered backprojection and iterative algorithms.

Main Results:

• Group I patients exhibited significant bladder-filling artifacts (streak and count loss) in various pelvic bone regions.
• Iterative reconstruction reduced but did not eliminate artifacts in Group I.
• Group II patients showed near-background bladder activity and no significant artifacts, with near-identical ROI values across the pelvis.

Conclusions:

• Forced diuresis combined with IV hydration effectively produces artifact-free pelvic bone SPECT.
• This protocol enhances diagnostic accuracy, particularly for evaluating the femoral heads and pubic bones.