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Intermediate Technical IVT

contrast timing

Precise temporal coordination of contrast injection with image acquisition to optimize vascular enhancement and diagnostic quality.

Full Definition

Contrast timing encompasses the critical temporal parameters governing contrast agent administration and image acquisition in vascular imaging studies. This includes bolus tracking, test bolus timing, and automated triggering techniques to ensure peak arterial enhancement coincides with data acquisition. Proper timing prevents early venous contamination, reduces motion artifacts, and minimizes contrast volume requirements. Advanced techniques include bolus geometry optimization, multi-phase acquisition protocols, and patient-specific timing adjustments based on cardiac output and circulation time. Poor timing results in suboptimal enhancement, necessitating repeat studies or additional contrast administration.

Usage

Usage note: Document specific timing parameters used to facilitate protocol optimization and troubleshooting.

In Context

  • "Optimal contrast timing achieved peak aortic enhancement of 350 HU during the arterial phase." — CT angiography technique note
  • "Poor contrast timing resulted in early venous opacification obscuring the pulmonary arterial anatomy." — Pulmonary embolism CT quality assessment

Also known as

bolus timing injection timing

Don't confuse with

scan delay acquisition timing

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