[Sequential angio-urography (SAU) with photographic image subtraction].

Area of Science:

• Radiology
• Medical Imaging

Background:

• Conventional urography has limitations in visualizing renal vasculature and detecting certain pathologies.
• Digital subtraction angiography (DSA) is effective but requires specialized digital equipment.

Purpose of the Study:

• To evaluate the efficacy of bolus injection urography with rapid seriography for visualizing the abdominal aorta and renal arteries.
• To determine the diagnostic yield of this technique for detecting urothelial and extrarenal pathologies.
• To propose bolus urography as an alternative to DSA in resource-limited settings.

Main Methods:

• Urography was performed in 250 patients using bolus injection of a large contrast medium volume.
• Rapid seriography was employed to capture the early vascular phase, with image subtraction utilized as needed.
• Visualization rates of the abdominal aorta and renal arteries were recorded.

Main Results:

• The abdominal aorta and renal arteries were successfully demonstrated in 97.6% of patients.
• Pathological conditions not detectable by conventional urography were identified in 34.4% of cases.
• Extrarenal pathology was diagnosed in 12.4% of cases.

Conclusions:

• Bolus injection urography with rapid seriography is highly effective for visualizing renal arteries and the abdominal aorta.
• This technique significantly increases the detection rate of pathologies compared to conventional urography.
• It is a recommended systematic alternative to DSA, particularly where digital equipment is not accessible.