This is a multi-center, prospective and controlled clinical trial which will enroll 200 coronary arteriography or percutaneous coronary intervention with 2-4 interventional cardiologist. The interventional cardiologist performed 100 interventional procedures using either a new protective device (NPD) or a traditional lead clothing (TLC). The cumulative dose outside the NPD or TLC and the first operator at each height (110cm, 90cm, 50cm, 10cm) was measured. The main indicators of the study are the average X-ray shielding efficiency of the NPD and the TLC at four different heights. The investigators will record all operation information in this study.

In this study, the investigators developed a new protection device (NPD) and compared its effects on the reduction of radiation exposure compared with the traditional lead clothing (TLC).

The NPD (WLXP-006, Yingnuoweite Medical Science and Technology, Co., Ltd., Nanjing, China) is a floor-standing medical radiation protection device mainly composed of a barrel-like frame and protective lead rubber (0.5 mm lead equivalent).

Inclusion Criteria:

• Consecutive patients were admitted to the group for coronary arteriography (CAG) or percutaneous coronary intervention (PCI).

Exclusion Criteria:

• There were no exclusion criteria, and the patients were continuously enrolled for interventional diagnosis and treatment.

Patients referred for CAG or PCI were successively included in the First Affiliated Hospital of Nanjing Medical University and The First People's Hospital of Lianyungang.