Michael Ficorelli

To describe clinical indications for C.T.A. examinations in the circulatory system . To understand and recognize anatomy and landmarks. To show the proper scan protocols and procedures.

Indications Heart Circulation Contrast rate General scanning protocols Circle of Willis Carotid artery Thoracic aorta Pulmonary Abdominal RenalLower Leg

Angiography Better than MRA no motion of flow

phenomon Less contrast than interventional Done in less time not invasive With MDCT fast scan less misregistration

and short breath hold time Good spatial resolution CTA uses port processing

Maximum intensity projection Multi-planner imaging Volume rendering

Post processingUse overlapping reconstructed slices

for mipsGood to subtract out bone and other

anatomy Image can be rotated in all planes

sag, cor, axCan be turned into a negative image

in in interventional

Best to overlap data

Can reconstruct in any plane

Good views to measure aneurysms

Uses all axial data to recon imagesAll the voxel information is usedDisplays internal structures and

vesselsOn most work stations tech can put

color to images

DissectionAneurysmsPlaqueStenosisMorphologyPre and Post surgical assessmentArteriovenous malformation

ANEURYSM

PRE POST

MIPVRTMPR CORONAL AND SAGITAL

BASILAR STENOSIS

PRE CONTRAST

12

3

1. FALSE LUMEN 2- TRUE LUMEN 3- THROMBUS

Note that the portal vein drains blood into the liver, not from the liver. The blood entering the liver from the portal vein, after being cleaned by the liver, flows into the inferior vena cava via the hepatic veins. The inferior mesenteric vein usually does not directly connect to the hepatic portal vein; it drains into the splenic vein.

VRT WITH BONE VRT WITHOUT BONE

RENAL ARTERIES ARE AT THE LEVEL OF L1-L2

AXIAL AXIAL

MIP IMAGE VRT IMAGE

Peripheral Vascular Disease: Occlusive and Aneurismal Disease Evaluate extent of disease Plan future intervention Extremity CTA Indications Assess previous surgery

TraumaCongenital changes