Publications [#292761] of G. Allan Johnson

Papers Published

1. Spielmann, AL; Nelson, RC; Lowry, CR; Johnson, GA; Sundaramoothy, G; Sheafor, DH; Paulson, EK, Liver: single breath-hold dynamic subtraction CT with multi-detector row helical technology feasibility study., Radiology, vol. 222 no. 1 (January, 2002), pp. 278-283, ISSN 0033-8419 [11756737], [doi]
   (last updated on 2026/01/14)

   Abstract:
   Fifty-two patients with known or suspected hypervascular malignancy were examined to determine the technical feasibility of performing single-breath-hold dynamic subtraction computed tomography (CT) of the liver with multi-detector row helical CT. The precontrast and hepatic arterial CT scans, which were acquired during the same breath hold, were subtracted. The mean liver-to-muscle contrast ratio on the precontrast, hepatic arterial, and subtracted images was 1.3, 1.4, and 2.3, respectively. In 13 patients with lesions, the subtracted images showed a 2.5-fold increase in mean lesion contrast compared with the hepatic arterial CT scans.

   Keywords:
   Adult • Aged • Feasibility Studies • Female • Humans • Liver Neoplasms • Male • Middle Aged • Neovascularization, Pathologic • Prospective Studies • Subtraction Technique • Tomography, X-Ray Computed • methods* • radiography • radiography* • secondary