[Experimental measurements of renal circulation using digital functional angiography]

Area of Science:

• Medical Imaging
• Nephrology
• Cardiovascular System

Context:

• Assessing renal blood flow is crucial for diagnosing kidney diseases and hypertension.
• Conventional angiography has limitations in quantifying blood flow parameters.
• Digital image processing offers advanced capabilities for functional analysis.

Purpose:

• To evaluate new digital image processing techniques for assessing renal blood flow.
• To determine the accuracy and reproducibility of functional angiography in measuring renal blood flow.
• To explore the potential of digital angiography as a diagnostic tool for renal vascular conditions.

Summary:

• New digital image processing techniques were tested for functional angiography to assess renal blood flow.
• Density-time variations of contrast media were analyzed from image matrices at 25 frames/sec.
• Calculations using a PDP 11/40 computer determined renal blood flow as a percentage of pre-renal aortic flow, showing high reproducibility and ability to detect flow reductions.

Impact:

• Digital angiography demonstrates diagnostic capabilities for detecting abnormal renal blood flow.
• This technique can serve as a valuable adjunct to conventional angiography.
• It has the potential to assist in the evaluation of renal vascular hypertension.