Table 2 Cardiac CT parameters in use at our institution

Contrast volume/injection rate^a

<60 kg: 60 cc @ 4 cc/s

60–80 kg: 85 cc @ 5 cc/s

80–100 kg: 95 cc @ 6 cc/s

>100 kg: 105 cc @ 7 cc/s

Voltage (kV)

<60 kg: 100–120 kV

60–100 kg: 120 kV

>100 kg: 135 kV

Current (mA)

BSA ≤ 18.5: 120 kV@370 mA

BSA 18.5-25: 120 kV@ 440 mA

BSA 25–30: 120 kV@510 mA

BSA >30: 120 kV@580 mA or 135 kV @510 mA

Test bolus

To test timing 4 s after maximum opacification of the coronary arteries

Coverage

160 mm Volume (0.5 × 320 mm)

Tube rotation

0.35 s

Scan mode

Prospective gating for:

HR < 60 bpm: 70-80 %

HR 60–63 bpm: 60 % - R

HR 63–65 bpm: 40 % - R

Retrospective triggering for:

HR > 65