Ultrasonic Image Feature Analysis under Deep Learning Algorithm to Evaluate the Efficacy of Drug-Coated Balloon for Treatment of Arteriosclerotic Occlusion

Table 1

The diagnostic grading standards of DSA [14].

Degree of arterial stenosis	Arterial manifestation of DSA	Score
Normal	The wall of the tube was smooth and the lumen was not stenosis.	0
Degree I (mild)	The wall of the tube was normal or mildly irregular, and the lumen stenosis was 30%-49%.	1
Degree II (moderate)	Vascular stenosis was moderate, but there was no segmental absence of development, and the lumen stenosis was 50%-74%.	2
Degree III (severe)	Vascular stenosis was severe, with partial interruption of development, but the development occurred in the distal segment, with lumen stenosis ranging from 75% to 99%.	3
Degree V (occlusion)	There was no vascular development and occlusion was complete.	4