Differences Between C-arm, G-arm, and O-arm
C-arm, G-arm, and O-arm are commonly used devices in medical imaging, each with unique features and applications. Below are the key differences in terms of structure, imaging technology, operability, and clinical use:
C-arm:
Features a C-shaped arc structure, with the X-ray tube and detector (or image intensifier) mounted at both ends. It supports rotation and tilt, and has an open design for easy operation during surgery.
G-arm:
Composed of two independent C-arms crossing each other vertically (similar to the letter "G"). Each arm is equipped with its own X-ray system (tube + detector), enabling simultaneous capture of both anteroposterior and lateral images.
O-arm:
Has a ring-shaped closed structure (similar to a CT scanner), with the X-ray tube and multi-row detectors integrated into the ring frame. It supports 360° rotational scanning and can generate three-dimensional volume images.
C-arm:
Provides 2D real-time imaging, ideal for dynamic guidance and routine surgeries.
Advantages include pulse fluoroscopy (low radiation), digital subtraction angiography (DSA), and flexible image post-processing functions.
G-arm:
Provides dual-plane synchronous 2D imaging, capturing both front and side images simultaneously, which improves accuracy during complex surgeries.
Features a low-dose dual exposure mode that reduces the need for angle adjustments during surgery and shortens operation time.
O-arm:
Provides CT-like 3D imaging, capable of generating high-resolution 3D images suitable for precise surgical navigation.
Uses low-dose spiral scanning technology to rapidly acquire 3D images, seamlessly integrates with navigation systems, and supports accurate implant planning.
C-arm:
Lightweight and flexible, can be moved to different operating rooms.
Requires manual angle adjustment, needing skilled technicians, and frequent adjustments during surgery, leading to higher cumulative radiation exposure.
G-arm:
Dual-plane automatic synchronous imaging reduces manual adjustments, improving surgical efficiency.
The integrated operational interface is larger in size, limiting mobility and requiring more space in the operating room.
O-arm:
Fully automatic ring-shaped scanning with a one-button 3D image generation feature.
Large in size, requiring a fixed installation or a dedicated operating room, with high initial investment and maintenance costs.
C-arm:
Orthopedics: Fracture reduction, joint replacement
Interventional: Cardiac stenting, embolization
Pain Management: Nerve blocks, radiofrequency ablation
Suitable for general surgeries and primary care hospitals.
G-arm:
Complex orthopedic surgeries: Scoliosis correction, pelvic fractures
Multi-angle implant positioning: Spinal pedicle screw implantation, hip fracture fixation
Ideal for orthopedic specialty hospitals, particularly for complex spinal surgeries.
O-arm:
Neurosurgery: Deep brain electrode implantation, tumor resection
Spinal surgery: Minimally invasive fixation, deformity correction
Suitable for large hospitals or specialized centers that require high-precision imaging and navigation systems.
C-arm:
Lower cost and high cost-performance ratio, suitable for routine surgeries and primary care hospitals.
Ideal for hospitals with limited budgets and less complex anatomical requirements.
G-arm:
Mid-high cost, suitable for specialized orthopedic hospitals, especially for complex spinal surgeries.
Recommended for surgeries requiring dual-plane imaging and high positioning accuracy.
O-arm:
High cost, suitable for surgeries that require 3D imaging and precise navigation.
Ideal for neurosurgery centers or other high-precision medical institutions.
In summary, C-arm is suitable for routine surgeries and smaller hospitals with budget constraints, G-arm is best for orthopedic specialty hospitals, particularly for complex spinal surgeries, and O-arm is perfect for high-precision surgeries such as neurosurgery and minimally invasive spinal surgery.
