What Is Interventional Radiology?

Interventional radiology is a medical subspecialty that performs minimally invasive procedures using real-time imaging guidance, such as X-ray fluoroscopy, CT scans, MRI, or ultrasound. Interventional radiologists access diseased areas through incisions smaller than one centimetre, inserting catheters and specialised instruments guided by continuous imaging. Diagnostic procedures include image-guided biopsies and angiography to identify blockages or abnormalities in blood vessels and organs.

Therapeutic interventions treat conditions directly: stent placement opens blocked arteries, embolisation stops bleeding or shrinks tumours, and ablation destroys cancer cells without surgery. The approach causes less tissue damage, requires shorter hospital stays, and results in fewer complications than traditional open surgery, while treating vascular diseases, cancers, and structural abnormalities throughout the body.

How Interventional Radiology Works

Interventional radiology combines advanced medical imaging with specialised minimally invasive techniques to diagnose and treat diseases through small incisions rather than open surgery.

• Interventional radiologists use real-time imaging equipment, including fluoroscopy, CT scanners, ultrasound, and MRI, to visualise internal anatomy continuously during procedures. This constant visual guidance allows precise navigation through blood vessels and organs, ensuring accurate instrument placement and immediate verification of treatment success without exploratory incisions.
• A small puncture site, typically at the groin, wrist, or neck, provides vascular access through which thin catheters and guidewires navigate the body’s natural pathways. These instruments measure 2-3 millimetres in diameter, enabling them to travel through arteries and veins to reach diseased areas anywhere in the body, using the circulatory system as a highway.
• For non-vascular procedures, interventional radiologists use imaging guidance to place needles or catheters directly through the skin into target organs or fluid collections. Examples include liver biopsies, kidney drainage procedures, and tumour ablations performed under CT or ultrasound guidance, ensuring accuracy while avoiding critical structures such as nerves and major vessels.
• Specialised tools delivered through catheters perform therapeutic interventions: balloons inflate to open blockages, coils stop bleeding, radiofrequency probes destroy tumours, and stents prop open narrowed vessels. Each instrument is specifically designed for minimally invasive delivery, replacing what previously required large surgical incisions and direct organ exposure.
• The entire procedure typically occurs under local anaesthesia with conscious sedation, allowing patients to communicate with the medical team and avoid general anaesthesia risks. Most patients remain awake but comfortable throughout treatment, experiencing minimal pain and recovering within hours rather than days or weeks required after traditional surgery.

From vascular blockages to tumour ablation, interventional radiology procedures address conditions across multiple body systems through image guidance.

Interventional Radiology Procedures: Types & Applications

Interventional radiology encompasses minimally invasive procedures categorised by focus: vascular interventions treating blood vessel diseases; non-vascular procedures addressing organs and structures; and interventional oncology targeting cancers through image-guided therapies, often termed pinhole surgery due to incision sizes under one centimetre.

1. Vascular Interventional Radiology

Vascular interventional radiology addresses arterial and venous diseases through catheter-based techniques. Angioplasty opens blocked arteries by inflating a balloon, followed by stent placement to maintain vessel patency. Embolisation stops internal bleeding or cuts off a tumour’s blood supply. Mechanical thrombectomy achieves 97.41% technical success and 95.39% clinical success rates for acute limb ischemia ^[1]. Dialysis access procedures create vascular pathways for patients with kidney failure who require hemodialysis.

2. Non-Vascular Interventional Procedures

Non-vascular procedures target organs, bones, and fluid collections under imaging guidance. Image-guided biopsies extract tissue samples from suspicious masses in the liver, lungs, kidneys, or bones. Drainage procedures place catheters to evacuate abscesses or obstructions. Vertebroplasty injects bone cement into fractured vertebrae for stabilisation. Interventional radiology for postpartum haemorrhage achieves 79-95% success rates while avoiding hysterectomy ^[2].

3. Interventional Oncology

Interventional oncology delivers targeted cancer treatments directly to tumours while sparing healthy tissue. Radiofrequency ablation, microwave ablation, and cryoablation destroy tumours using heat or extreme cold. Chemoembolization combines chemotherapy with embolisation particles, concentrating treatment in liver tumours. Y-90 radioembolization delivers radioactive microspheres into hepatic tumours. Interventional radiology in India increasingly offers these oncologic treatments, expanding cancer care beyond surgery and chemotherapy.

Also read: Mammogram vs USG: The Ultimate Breast Cancer Scan Guide.

Benefits of Interventional Radiology

Interventional radiology delivers clinical outcomes equivalent to traditional surgery while significantly reducing procedural trauma, recovery time, complication rates, and healthcare costs across vascular, oncologic, and non-vascular conditions.

Here are some of the benefits of interventional radiology:

• Incisions under one centimetre preserve surrounding healthy structures, reducing blood loss, infection risk, and wound healing time. Most patients resume normal activities within days rather than the weeks required after conventional surgery.
• Shorter stays reduce the risk of hospital-acquired infections, decrease healthcare costs, and minimise disruption to patients’ personal and professional lives. Outpatient IR procedures are associated with significantly fewer ICU admissions and hospital readmissions than their surgical equivalents.
• Population data indicate that ablation is associated with nearly half the rate of new-onset chronic renal insufficiency compared with radical nephrectomy. This evidence positions IR as a first-line option for localised renal cell carcinomas and early hepatocellular carcinoma.
• Patients return to normal activities within one week, compared with the weeks required after hysterectomy or myomectomy. This procedure preserves fertility while effectively treating fibroids, causing heavy bleeding, pain, and pressure symptoms.
• The global IR market value is projected to exceed USD 43 billion by 2029 at 7.13% annual growth, reflecting expanding clinical adoption worldwide ^[3]. The trajectory demonstrates increasing confidence among physicians and patients in IR outcomes across multiple specialities.
• Healthcare systems benefit financially from reduced costs due to faster recovery, fewer complications, and more efficient outpatient procedure delivery.

Understanding the meaning of interventional radiology becomes clearer when directly compared with traditional surgery across key clinical parameters.

Interventional Radiology vs Traditional Surgery

Image-guided catheter access through natural body pathways fundamentally eliminates the physiological stress, tissue disruption, and prolonged healing associated with conventional open surgical exposure.

Here is a tabular representation to understand the difference between the two:

Interventional radiology’s image-guided precision extends effective treatment across a remarkably broad spectrum of clinical conditions.

Conditions Treated with Interventional Radiology

Vascular and interventional radiology addresses over 100 distinct conditions across the arterial, venous, oncologic, hepatobiliary, genitourinary, and musculoskeletal systems through image-guided pinhole surgical techniques, thereby replacing conventional open surgical approaches.

• Peripheral artery disease, deep vein thrombosis, aneurysms, and chronic venous obstruction are core targets in vascular interventional radiology, treated with angioplasty, stenting, and thrombolysis. Inferior vena cava filters prevent pulmonary embolism in anticoagulation-ineligible patients.
• Hepatobiliary conditions, including liver cancer, bile duct obstruction, and portal hypertension, are treated through chemoembolisation, biliary drainage, and transjugular intrahepatic portosystemic shunts. These interventional radiology procedures eliminate the need for major hepatic surgery.
• Uterine fibroids, benign prostatic hyperplasia, varicocele, and pelvic congestion syndrome undergo catheter-based embolisation, preserving organ function without surgical removal. Prostate artery embolisation treats BPH without resection or general anaesthesia.
• Renal cell carcinoma, hepatocellular carcinoma, lung tumours, and bone metastases undergo percutaneous ablation through radiofrequency, microwave, or cryoablation techniques. Interventional radiology in India increasingly offers these oncologic treatments as viable alternatives to surgery.
• Vertebral compression fractures, chronic pain conditions, and musculoskeletal tumours receive targeted percutaneous treatment under continuous fluoroscopic guidance. Vertebroplasty and nerve blocks address pain refractory to conservative management through minimally invasive interventional radiology procedures.

Why Choose Eskag Sanjeevani Radiology

Established in 2004, Eskag Sanjeevani Radiology operates under a Public-Private Partnership model across 24+ radiology centres spanning five states, including West Bengal, Bihar, Madhya Pradesh, Maharashtra, and Tripura, making advanced diagnostic imaging accessible and affordable across India. The network provides government-approved, certified imaging services, including 128-Slice Cardiac CT, 1.5- and 3 Tesla Soundless MRI, Digital X-Ray, and Ultrasound, supported by expert radiologists who deliver accurate same-day reporting.

Advanced imaging technology, including high-field MRI and ultra-fast CT scanners with low-dose radiation protocols, ensures diagnostic precision for guiding interventional procedures and treatment planning. With 24/7 emergency access, a dedicated patient-centric care approach, and digital report delivery, Eskag Sanjeevani Radiology provides reliable diagnostic infrastructure for patients requiring imaging support before, during, and after interventional radiology procedures.