Power Dopler Ultrasonography vs Color Dopler of the Sentinel Lymph Mammary Glands at Female Dog

摘要

The DOPLER ultrasonography is a relatively new technique in exploring thelymphatic system. Doppler ultrasonography is a further technique of ultrasound investigationapplicable especially to vascular structures and also to the blood flow from these structures. As anindependent technique it is used particularly in assessing the superficial or deep arteries and veins(abdominal, pelvic), except in evaluating the intracranial segments of internal carotid arteries, wheremagnetic resonance or angiography is sovereign. Doppler examination method complements twodimensionalultrasonography applied to organs and parenchyma structures. The objective pursued bythe Doppler technique, related to the lymph nodes is represented by the blood flow of lymph vessels.Doppler obtained data refer to: the presence, direction, speed and character of the blood flow thatcontributes to generating the Doppler signal. The aim of the study is to compare the two methodswhich use Doppler effect, color Doppler and power Doppler in assessing vascular architectonics ofsentinel lymph nodes of mammary glands and to determine the method with the highest sensitivity toidentify lymph vessels. 38 lymph nodes belonging to 18 bitches, of which 14 were presentingpathology and 4 subjects showed no associated pathology were examined using ultrasound. 18metastatic lymph nodes were identified, which revealed impaired vascular architectonics, 12 lymphnodes with inflammatory increased vascular signal and 6 normal. At 2 lymph nodes the presence ofvascular signal was not observed. The Power Doppler method identified more accurately the vascularsignal compared to the Color Doppler ultrasound.