Philips Clinical & Medical Affairs Global.

The purpose of this study is to assess the satisfaction of the common functions, the operation convenience, and the whole system stability, and the safety of CT 5400 RT System.

The purpose of this study is to evaluate the effectiveness of the Precise Image (PI), an AI feature of CT 5400 RT System

The goal of this clinical trial is to test the Thor system in adult (≥ 18 year old) patients with de novo (new, never treated) calcified lesions in infrainguinal (leg) arteries (peripheral artery disease or PAD).
The main question[s] it aims to answer are:
* Is the Thor system safe in treating these lesions
* Does the Thor system work to treat these lesions
Participants will:
* Receive treatment with the Thor system
* Have follow-up visits at Discharge, 30 days, 6 months, and 12 months