Price of isotropy in multidetector CT

Neal C. Dalrymple, Srinivasa R. Prasad, Fadi M. El-Merhi, Kedar N Chintapalli

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

Recent advances in multidetector computed tomography (CT) have made isotropic data acquisition feasible for nearly every application. The benefits of routine use of isotropic data for image display and interpretation have been described in the literature and at educational conferences. However, there is usually a trade-off in the form of an increased radiation dose to the patient. The parameters that affect the radiation dose vary considerably in accordance with the CT scanner design, and those variations determine the cost in dose increase relative to the voxel size. The detector configuration and beam collimation (narrow or wide) used for a particular acquisition also affect the voxel size and the relationship between spatial resolution and the radiation dose. By closely comparing the quality of multidetector CT images obtained with different detector configurations on scanners with four, 16, 40, and 64 channels and the estimated radiation exposure incurred with each option, radiologists may achieve an understanding of the relationship between radiation dose and voxel size. This understanding, in turn, may help balance the need for diagnostic image quality against the concern for patient safety.

Original languageEnglish (US)
Pages (from-to)49-62
Number of pages14
JournalRadiographics
Volume27
Issue number1
DOIs
StatePublished - Jan 2007

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Multidetector Computed Tomography
Radiation
X-Ray Computed Tomography Scanners
Data Display
Patient Safety
Costs and Cost Analysis

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology
  • Medicine(all)

Cite this

Dalrymple, N. C., Prasad, S. R., El-Merhi, F. M., & Chintapalli, K. N. (2007). Price of isotropy in multidetector CT. Radiographics, 27(1), 49-62. https://doi.org/10.1148/rg.271065037

Price of isotropy in multidetector CT. / Dalrymple, Neal C.; Prasad, Srinivasa R.; El-Merhi, Fadi M.; Chintapalli, Kedar N.

In: Radiographics, Vol. 27, No. 1, 01.2007, p. 49-62.

Research output: Contribution to journalArticle

Dalrymple, NC, Prasad, SR, El-Merhi, FM & Chintapalli, KN 2007, 'Price of isotropy in multidetector CT', Radiographics, vol. 27, no. 1, pp. 49-62. https://doi.org/10.1148/rg.271065037
Dalrymple NC, Prasad SR, El-Merhi FM, Chintapalli KN. Price of isotropy in multidetector CT. Radiographics. 2007 Jan;27(1):49-62. https://doi.org/10.1148/rg.271065037
Dalrymple, Neal C. ; Prasad, Srinivasa R. ; El-Merhi, Fadi M. ; Chintapalli, Kedar N. / Price of isotropy in multidetector CT. In: Radiographics. 2007 ; Vol. 27, No. 1. pp. 49-62.
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