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A C-arm is a medical X-ray imaging device primarily used for real-time image guidance during surgery. It is widely used in clinical settings such as orthopedics, cardiovascular intervention, and emergency medicine. Its C-arm structure enables multi-angle imaging, assisting doctors with precise positioning and manipulation.
Definition and Core Functions
A C-arm (mobile C-arm X-ray machine) consists of a C-shaped gantry, an X-ray tube, and a digital imaging system. Its core function is to generate real-time images using X-ray fluoroscopy and photography technology to support intraoperative navigation. These devices typically have the following features:
● Low-radiation design: Pulsed fluoroscopy and intelligent exposure control reduce radiation exposure for both doctors and patients.
● Flexible operation: The C-arm can rotate over 115° to accommodate various surgical angles.
● High-definition imaging: Some models are equipped with a dynamic flat-panel detector or 4K monitor for enhanced image resolution.
Typical Application Scenarios
● Orthopedic surgery: Intraoperative positioning for fracture reduction, vertebroplasty, and joint replacement.
● Cardiovascular Intervention: Angiographic procedures such as catheter placement and stent implantation.
● Emergency and Minimally Invasive Surgery: Foreign body removal, nerve block guidance, and laparoscopic surgery assistance.
● Other Fields: Urology, pain management, and gynecological fallopian tube surgery.
Technical Classification
Based on function and scale, they are divided into three categories:
● Small C-arm: Portable, suitable for basic orthopedic and surgical procedures in secondary hospitals.
● Medium C-arm: Supports complex interventional procedures (such as ERCP and tumor treatment), with functions similar to large vascular angiography machines.
● Large C-arm (DSA): Fixed, high-powered device, dedicated to whole-body angiography and high-level procedures in tertiary hospitals.
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