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High-resolution computed tomography with single-slice computed tomography and 16-channel multidetector computed
J Vikgren1, M Båth, A A Johnsson
1Departments of Radiology, and Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Göteborg, Sweden.
Acta Radiologica (Stockholm, Sweden : 1987)
|October 25, 2007
Summary
Multidetector CT (MDCT) offers comparable or better image quality than single-slice CT (SSCT) for evaluating interstitial lung disease, particularly regarding motion artifacts. However, helical MDCT shows inferior visibility of certain lung structures compared to conventional HRCT.
Area of Science:
- Radiology
- Pulmonary Medicine
- Medical Imaging
Background:
- High-resolution computed tomography (HRCT) is standard for interstitial lung disease evaluation.
- Multidetector-row CT (MDCT) allows simultaneous thin and thick slice reconstruction, potentially replacing step-and-shoot acquisitions.
- Investigating the utility of MDCT for HRCT is crucial.
Purpose of the Study:
- Compare HRCT using single-slice CT (SSCT) and 16-channel MDCT.
- Evaluate visibility and motion artifacts between SSCT and MDCT.
- Determine if helical MDCT images match or exceed conventional SSCT HRCT quality.
Main Methods:
- 20 patients underwent HRCT step-and-shoot using SSCT and MDCT.
- A helical MDCT acquisition was also performed.
- Images were analyzed for visibility and motion artifacts at four anatomical levels.
Main Results:
- MDCT step-and-shoot showed equal or better visibility than SSCT step-and-shoot for segmental bronchi and fissures.
- Helical MDCT visibility was equal or better for segmental bronchi but not fissures.
- Both MDCT step-and-shoot and helical MDCT demonstrated significantly fewer motion artifacts than SSCT step-and-shoot.
Conclusions:
- Image quality of SSCT step-and-shoot and MDCT step-and-shoot is comparable.
- Helical MDCT provides inferior visibility of anatomical structures compared to HRCT step-and-shoot.
- MDCT shows promise in reducing motion artifacts in lung imaging.
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