Quantitative bone scanning of the hip. Comparison between the perfusion and static phases

Area of Science:

• Orthopedics
• Nuclear Medicine
• Radiology

Background:

• Quantitative bone scanning is a diagnostic tool for hip disorders.
• Assessing femoral head uptake ratios in perfusion and static phases offers insights into bone metabolism and blood flow.

Purpose of the Study:

• To evaluate the utility of quantitative bone scanning in differentiating various hip pathologies.
• To establish uptake ratio benchmarks for normal hips and specific hip disorders.

Main Methods:

• Quantitative bone scanning of the hip was performed on 50 patients.
• Uptake ratios of the involved femoral head were calculated during perfusion and static phases.
• Patients included those with no symptoms, endoprostheses, intertrochanteric fractures, femoral neck fractures, osteoarthritis, and avascular necrosis.

Main Results:

• Asymptomatic patients showed minimal uptake ratio differences (<0.02).
• Patients with endoprostheses had average ratios of 0.52 (perfusion) and 0.34 (static).
• Intertrochanteric fractures, undisplaced femoral neck fractures, and osteoarthritis showed high uptake ratios (>1.1).
• Displaced femoral neck fractures averaged 0.76 (perfusion) and 0.92 (static).
• Avascular necrosis presented ratios of 0.82 (perfusion) and 1.57 (static).

Conclusions:

• Quantitative bone scanning provides objective data for assessing hip disorders.
• Uptake ratios in perfusion and static phases correlate with bone blood flow and metabolic activity.
• This technique can aid in the diagnosis and characterization of various hip pathologies.