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Related Concept Videos

Imaging Studies for Cardiovascular System V: CT01:28

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Related Experiment Video

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Whole-brain CT perfusion imaging using increased sampling intervals: A pilot study.

Guoquan Cao1, Weijian Chen1, Houzhang Sun1

  • 1Department of Radiology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China.

Experimental and Therapeutic Medicine
|October 1, 2017
PubMed
Summary
This summary is machine-generated.

A new 15-volume protocol for whole-brain perfusion imaging using 320-detector row CT offers comparable results to the standard 19-volume protocol. This method reduces radiation dose by approximately 16% without compromising perfusion parameter accuracy.

Keywords:
320-detector row CTcomputed tomography perfusionradiation dosesampling interval

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Area of Science:

  • Radiology
  • Medical Imaging
  • Neurology

Background:

  • Whole-brain perfusion imaging is crucial for diagnosing various neurological conditions.
  • Dynamic-volume computed tomography (CT) with 320-detector rows enables comprehensive brain imaging.
  • Optimizing imaging protocols is essential for balancing diagnostic accuracy and radiation dose.

Purpose of the Study:

  • To assess the feasibility of reduced-sampling interval protocols for whole-brain perfusion CT.
  • To compare novel 11-volume (P11) and 15-volume (P15) protocols against a standard 19-volume (P19) protocol.
  • To evaluate diagnostic parameter consistency and radiation dose reduction.

Main Methods:

  • 12 volunteers underwent whole-brain perfusion imaging using 320-detector row dynamic-volume CT.
  • Data acquired with P11, P15, and P19 protocols were analyzed using Volume-Engineered System.
  • Bland-Altman analysis was performed using MedCalc software to assess perfusion parameters (MTT, CBV, CBF, TTP).

Main Results:

  • Inconsistency for MTT, CBV, CBF, and TTP between novel and standard protocols was less than 5%, indicating trustworthy data.
  • P15 demonstrated smaller mean differences and higher consistency for perfusion parameters compared to P11 when compared with P19.
  • The P15 protocol achieved comparable results to P19 with a potential radiation dose reduction of approximately 16%.

Conclusions:

  • The 15-volume protocol (P15) is a feasible and reliable method for whole-brain perfusion imaging.
  • P15 offers higher consistency with the standard protocol (P19) than the 11-volume protocol (P11).
  • P15 is recommended for routine whole-brain perfusion imaging due to its balance of accuracy and reduced radiation exposure.