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Research ArticleBrain

MR T1-Weighted Inversion Recovery Imaging in Detecting Brain Metastases: Could It Replace T1-Weighted Spin-Echo Imaging?

Y.-F. Qian, C.-L. Yu, C. Zhang and Y.-Q. Yu
American Journal of Neuroradiology April 2008, 29 (4) 701-704; DOI: https://doi.org/10.3174/ajnr.A0907
Y.-F. Qian
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C.-L. Yu
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C. Zhang
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Y.-Q. Yu
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    Fig 1.

    Brain metastases from pulmonary carcinoma are hyperintense on pre-enhanced T1SE image (A) because of bleeding, and many lesions were missed on the pre-enhanced T1IR image (B).

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    Fig 2.

    A, Brain metastases from pulmonary carcinoma are hypointense on a pre-enhanced T1IR image. B, Compared with T1IR, 2 small cerebellar metastases and 1 small pontine metastasis (black arrow) were not detected with pre-enhanced T1SE imaging, which only showed 3 larger cerebellar lesions.

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    Fig 3.

    Postenhanced images of Fig. 1. The number of enhanced metastases is greater on postenhanced T1SE image (A) than on postenhanced T1IR image (B), and the conspicuity of lesions is better on the postenhanced T1SE image.

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    Fig 4.

    Brain metastases from breast cancer. The volume of the biggest metastases among the 3 lesions is similar between postenhanced T1SE image (A) and T1IR image (B), and the conspicuity of 2 smaller lesions is better on postenhanced T1SE image with more obvious contrast with brain tissue.

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    Table 1:

    Tumor signal intensity, degree of contrast enhancement, and CER detected with T1SE and T1IR

    SequenceSignal Intensity, Mean ± SDDegree of Contrast Enhancement, Mean ± SDCER, Mean ± SD, %
    Pre-EnhancedPost enhanced
    T1SE174.2 ± 17.0346.9 ± 88.8172.8 ± 93.4*101.7 ±5 9.4†
    T1IR270.7 ± 47.6492.9 ± 94.1222.2 ± 108.4*90.0 ± 60.7†
    • Note:—T1SE indicates T1-weighted spin-echo; T1IR, T1-weighted inversion recovery; CER, contrast-to-enhancement ratio.

    • * T1IR is higher (P < .001).

    • † There is no difference between the 2 sequences (P > .05).

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    Table 2:

    CR of metastases detected with T1SE and T1IR

    SequenceCR, Mean±SD
    Tumor to WMTumor to GMTumor to CSF
    Pre-EnhancedPostenhancedPre-EnhancedPostenhancedPre-EnhancedPostenhanced
    T1SE0.2 ± 0.1*0.6 ± 0.4†0.1 ± 0.1*0.9 ± 0.5†0.9 ± 0.3*2.8 ± 1.1*
    T1IR0.3 ± 0.1*0.3 ± 0.2†0.2 ± 0.1*0.7 ± 0.3†2.3 ± 0.8*4.9 ± 1.4*
    • Note:—T1SE indicates T1-weighted spin-echo; T1IR, T1-weighted inversion recovery; CR, contrast ratio; WM, white matter; GM, gray matter.

    • * T1IR is more sensitive (P < .05).

    • † T1SE is more sensitive (P < .05).

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American Journal of Neuroradiology: 29 (4)
American Journal of Neuroradiology
Vol. 29, Issue 4
April 2008
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Cite this article
Y.-F. Qian, C.-L. Yu, C. Zhang, Y.-Q. Yu
MR T1-Weighted Inversion Recovery Imaging in Detecting Brain Metastases: Could It Replace T1-Weighted Spin-Echo Imaging?
American Journal of Neuroradiology Apr 2008, 29 (4) 701-704; DOI: 10.3174/ajnr.A0907

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MR T1-Weighted Inversion Recovery Imaging in Detecting Brain Metastases: Could It Replace T1-Weighted Spin-Echo Imaging?
Y.-F. Qian, C.-L. Yu, C. Zhang, Y.-Q. Yu
American Journal of Neuroradiology Apr 2008, 29 (4) 701-704; DOI: 10.3174/ajnr.A0907
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