Interventional X-Ray (Cath Lab / IR)

Fixed fluoroscopy system purpose-built for image-guided interventional procedures. Ceiling-suspended or floor-mounted C-arm geometry, flat-panel detector, high-output X-ray tube, motorized patient table, and integrated hemodynamic / reporting workstations. Distinct from the mobile C-arm modality — cath labs are fixed room installs with significantly higher dose-rate capability, larger detectors, and dedicated infrastructure.

Physics

Continuous or pulsed fluoroscopy at high dose rates. Multiple imaging modes (fluoro, cine, DSA, 3D rotational angiography). Contrast agents + guidewires + stents delivered through percutaneous access; imaging guides placement in real time.

History

• 1929 — Werner Forssmann performs first human cardiac catheterization (on himself).
• 1950s–60s — coronary angiography clinical standard.
• 1970s — PTCA (angioplasty) emerges.
• 2004 — Philips Allura Xper ships — dominant cath platform for a decade.
• 2017 — Philips Azurion with ClarityIQ succeeds Allura.

Key specs

• Detector size — 14×17 cm cardiac, 19" angio / vascular / neuro
• Geometry — single-plane vs biplane
• Tube class — MRC, GIGALIX
• Dose reduction — ClarityIQ (Philips), Care+ (Siemens)
• Software release — Velara / CertaRay (Philips); similar generations on other vendors

Systems

• Philips Allura Xper family (legacy), Azurion (current)
• Siemens Artis family
• GE Innova family

Service reality

Fixed cath labs are capital projects — install is measured in weeks, and the room build-out (ceiling reinforcement, lead shielding, HVAC, hemodynamics cabling, sterile workflow plumbing) often costs as much as the imaging chain. Downtime affects booked interventional cases with sterile setups.

Regulatory

State fluoroscopy registration. Operator licensing (physician + RT in cath room). Dose monitoring (DAP) reported per case.