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CT ANGIOGRAPHY prepared by Dr khalid al joghaiman. PATIENT PREP. BUN 7-20 mg/dl CREAT.- 0.6 –1.2 mg/dl IODINE ALLERGY- STEROID THERAPY HYPERVENTILATION BEFORE EXAM FOR BETTER BREATHOLD. CONTRAST ADMINISTRATION. ORAL CONTRAST????. WATER NEGATIVE CONTRAST.
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PATIENT PREP. • BUN 7-20 mg/dl • CREAT.- 0.6 –1.2 mg/dl • IODINE ALLERGY- STEROID THERAPY • HYPERVENTILATION BEFORE EXAM FOR BETTER BREATHOLD
ORAL CONTRAST???? WATER NEGATIVE CONTRAST
AUTOMATED CONTRAST ADMINISTRATION SYSTEMS • SMARTPREP • CARE • SURESTART
CONTRAST ADMINISTRATION AND SCANNING METHODS • BOLUS TRACKING • BOLUS TIMING • MANUAL PRESET TIME
Circle of Willis?! 40 SEC
CERBRAL CTA CAROTID CTA CHEST CTA (PE) 15 SEC 12 SEC 10-20 SEC MANUAL DELAYS
TWO TECHNIQUES TO REDUCE MOTION ARTIFACTS IN CARDIAC CT • PROSPECTIVE TRIGGERING • RETROSPECTIVE GATING
BOTH METHODS REQUIRE ECG MONITORING DIASTOLIC PHASE
CARDIAC ANGIOGRAM PERFORMED WITH CONTRAST INJECTION 4-5 cc/sec 150 cc total volume
CALCIUM SCORING NO IV CONTRAST USED
3-D VISUALIZATION TOOLS IN CTA • MPR • MIP • SSD • VR • CINE
CTA - MPR PLANE?
MPR PLANE?
SIMPLE FAST ANY PLANE VISUALIZATION LESS USEFUL IN COMPLEX VESSEL VISUALIZATION MPR
CALCIFICATION DETECTION THROMBUS DETECTION AILIASING ARTIFACT EDITING REQUIRED MIP