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Spiral (helical) CT

J P Heiken1, J A Brink, M W Vannier

  • 1Mallinckrodt Institute of Radiology, Washington University School of Medicine, St Louis, MO 63110.

Radiology
|December 1, 1993
PubMed
Summary

Spiral computed tomography (CT) enables rapid, volumetric data acquisition for chest and abdominal imaging. This technique allows for faster scans, often within a single breath-hold, improving patient comfort and image quality.

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Area of Science:

  • Medical Imaging
  • Radiology
  • Diagnostic Technology

Background:

  • Traditional computed tomography (CT) involves sequential data acquisition.
  • Limitations in speed and coverage exist with conventional CT methods.

Purpose of the Study:

  • To review the technological advancements of spiral (helical) computed tomography (CT).
  • To discuss the benefits, drawbacks, and clinical uses of spiral CT.

Main Methods:

  • Spiral CT utilizes continuous patient translation during X-ray source rotation.
  • Simultaneous data acquisition and patient movement yield volumetric datasets.

Main Results:

  • Spiral CT significantly reduces scan times for chest and abdominal examinations.
  • Examinations can be completed within a single or few short breath-holds.
  • Volumetric data allows for multiplanar and 3D reconstructions.

Conclusions:

  • Spiral CT offers substantial advantages in speed and data acquisition for thoracic and abdominal imaging.
  • The technique enhances diagnostic capabilities through advanced visualization methods.
  • Current clinical applications of spiral CT are expanding.

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