Vasculature Doppler evaluation

Besides identification of the arterial-lacunar fistula, color Doppler ultrasonography allows evaluation of the penile vasculature to identify hemodynamically significant feeding vessels that present with high velocity flow. Both unilateral and bilateral feeding... 

Renal imaging usually is performed by US. Depending on the state and severity of the disease the kidneys may look normal or appear as in GN in severe renal involvement one may observe rarefaction of vasculature on aCDS with elevated RI values in duplex Doppler (Fig. 19.6). Improvement and normalisation of Doppler findings correlate with clinical improvement. Renal biopsy is mandatory for evaluation of the degree of renal involvement. Extra-renal imaging may be necessary in severe extrarenal manifestation, such as MR and CT in cerebral involvement, or echocardiography and cardiac MR in valvular heart disease. 

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