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. 2004 Dec 2;131(6):S1–S62. doi: 10.1016/j.otohns.2004.09.067

Table 6.

Characteristic radiographic findings for AFRS

CT findings MRI findings*
Diagnosis requires 1. At least one opacified paranasal sinus
Other strongly supportive radiographic findings
  • 1

    Expansion of the involved sinus

  • 2

    Attenuation-erosion of bone bordering involved sinus (best demonstrated with bone algorithm)

  • 3

    Signal heterogeneity within involved sinus (best demonstrated with soft tissue algorithm)

  • 4

    Unilateral or asymmetric distribution of disease

  • 5

    Displacement of adjacent anatomic compartments

 General
  • 1

    Involvement of at least one paranasal sinus

  • 2

    Expansion of involved paranasal sinus

  • 3

    Displacement of adjacent anatomic compartments

  • 4

    Lack of signal enhancement involving adjacent anatomic compartments
T1:
  • 1

    Peripheral enhancement of involved paranasal sinus (indicative of mucosal edema)

  • 2

    Involved paranasal sinus demonstrates variable signal intensity
T2:
  • 1

    Peripheral enhancement of involved paranasal sinus (indicative of mucosal edema)

  • 2

    Hypointense signal intensity within involved paranasal sinus
*

Optional but should not be used in the absence of CT.