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CardiacCT Images

Images Provided byDr. Dennis Foley

Professor of Radiology, Director Section of Digital ImagingFroedtert Memorial Lutheran Hospital

Milwaukee, WI

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CardiacCT

Equipment Used: GE Light Speed VCT 64 E-Z-EM EmpowerCTA Injector System

Contrast Used: Iso-osmolar contrast material at 320 mg iodine per mL

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Dr. Foleys Phasing Protocol

Phase Flow Rate Volume Time

1 Contrast 6.0 mL/sec 60 mL 10 sec

2 Contrast 2.0 mL/sec 6 mL 3 sec

3 Saline 5 mL/sec 30 mL 6 sec

We use a triphasic injection protocol where we inject rapidly for the

first phase thats going to produce a dense left heart. We inject lessrapidly in the second phase to get a partly dense right heart. Thenwe inject saline in the third phase to clear the superior vena cava.

Dennis Foley M.D.

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Phase 1: Contrast Rapid infusion rate 6mL/sec

Phase 2: Contrast Reduced infusion rate 2mL/sec

Phase 3: Saline Rapid infusion rate 30mL @ 5mL/sec

Multiphase Injection is Critical to Proper Enhancement of the Heart*

Phase 1: Acquisition Time + 4 X 6 mL/sec

Ex: Acquisition Time = 6 sec + 4 = 10 X 6 = 60 mL

Phase 2: (Peak Time 2) - Acquisition Time + 4 Ex: Peak Time = 15 sec 2 sec = 13 sec

Acquisition Time = 6 sec + 4 = 10 sec13 sec 10 sec = 3 sec @ 2 mL/sec = 6 mL

Phase 3: Saline Rapid infusion rate 30mL @ 5mL/sec

* Protocol care of Dennis Foley M.D. Froedtert Memorial Hospital

CardiacCT

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Ventricle and septum, well delineated between left and right ventricles,bypass graft, two stents, thinning in myocardium.

Right Ventricle

Septum

RCA

CardiacCT

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Transition of contrast in 1 heartbeat pulmonary outflow tract.

CardiacCT

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Aortic valve and proximal RCA.

Aortic Valve

Proximal RCA

CardiacCT

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Mitral valve, ventricles, septum, comparison of opacity in left vs.right heart.

Mitral Valve

CardiacCT

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Comparison of left and right ventricles showing moderator band.Coronary sinus going intro atrium.

CardiacCT

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Right coronary bypass graft, curve planar reformation.

CardiacCT

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Occluded proximal RCA and patent venous graft implant site anddistal opacity of positive left ventricle branch.

Transitionof Contrast

in RightHeart

CardiacCT

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Right coronary and posterior descending.

CardiacCT

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LAD to apex.

CardiacCT