michael ficorelli. to describe clinical indications for c.t.a. examinations in the circulatory...
TRANSCRIPT
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