Outlines requirements and time allocation Interventional Radiology? What's the edures can renlace certain faster recuperation than with surgery ification of vessel.artery (artcriogram)or a vein (yenogram).with an Images are digitized and stored ina computer.The background is eliminated (subtracted)so only the vessels are visible iner (ol)Hod ve The mor arteries are the usual sites of entry.Contrast can be injected through the catheter into the ANGIOGRAM: represents an arteriovenous DSA d bone has be THERAPEUTIC INTERVENTIONAL RADIOLOGY eprodes one with imaging gudance suchas ● sies Draining Balloon Angioplasty.Technique for dilating a narrowed artery using a balloon mdwihout any background,u o theo ANGIOGRAPHY diopaque substanc2 Outlines, requirements and time allocation Interventional Radiology? What's the big deal? ⚫ These procedures can replace certain surgeries ⚫ faster recuperation than with surgery ⚫ usually no hospital admission required (done as an outpatient) ⚫ local anaesthetic used instead of general anesthesia ⚫ safe and effective ⚫ INTERNATIONAL RADIOLOGY FOR DIAGNOSIS AND TREATMENT ⚫ DIAGNOSTIC INTERVENTIONAL RADIOLOGY ⚫ Angiography ⚫ Opacification of vessel, artery (arteriogram) or a vein (venogram), with an iodinated contrast agent ⚫ Digital Subtraction Angiography (DSA) ⚫ Images are digitized and stored in a computer. The background is eliminated (subtracted) so only the vessels are visible Seldinger Technique Technique for inserting a catheter (hollow tube) in a blood vessel. The femoral or axillary arteries are the usual sites of entry. Contrast can be injected through the catheter into the vessel. ANGIOGRAM: Conventional cerebral angiogram performed with a catheter in the right internal carotid artery. The worm-like vessel near the vertex of the skull represents an arteriovenous malformation DSA ⚫ Same case. The background bone has been subtracted by computer so that only the vessels are visible. (Vessels can be depicted as black or white.) ⚫ THERAPEUTIC INTERVENTIONAL RADIOLOGY ⚫ Percutaneous procedures done with imaging guidance such as: ⚫ Dilating stenoses ⚫ Obtaining biopsies ⚫ Infusing medication ⚫ Extracting renal or biliary stones ⚫ Draining abscesses ⚫ Draining obstructed urinary or biliary tracts ⚫ Occluding abnormal vessels ⚫ Balloon Angioplasty. Technique for dilating a narrowed artery using a balloon catheter. Digital Subtraction Angiography (DSA) ⚫ Defined X-ray images of blood vessels only, appearing without any background, due to the use of a computerized digital video subtraction process Angiography ⚫ Defined ⚫ A series of x-ray films allowing visualization of internal structures after the introduction of a radiopaque substance ANGIOGRAPHY ⚫ Visualization of vessels ⚫ Important in surgery ⚫ Relatively invasive ⚫ (puncture vessel, inject contrast) ⚫ Complications (hemorrhage, embolus) ⚫ Can be both diagnostic and therapeutic 20’