Table 1 APTw, MTR(3.5 ppm) and SWI signal intensities (mean ± standard deviation) in the ICH and contralateral normal brain tissue.

From: Amide proton transfer magnetic resonance imaging in detecting intracranial hemorrhage at different stages: a comparative study with susceptibility weighted imaging

ICH stage

Normal brain tissue

Hematoma

Hyperacute ICH (n = 7)

 APTw signal (%)

1.2 ± 0.4

4.6 ± 0.8*

 MTR(3.5 ppm) signal

0.70 ± 0.01

0.58 ± 0.07*

 SWI

247.9 ± 28.8

142.8 ± 62.5*

Acute ICH (n = 7)

 APTw signal (%)

1.5 ± 0.4

3.8 ± 1.6*

 MTR(3.5 ppm) signal

0.71 ± 0.01

0.54 ± 0.09*

 SWI

249.9 ± 44.4

124.0 ± 66.7*

Subacute ICH (n = 19)

 APTw signal (%)

1.2 ± 0.3

3.2 ± 1.9*

 MTR(3.5 ppm) signal

0.71 ± 0.02

0.54 ± 0.08*

 SWI

243.2 ± 42.8

198.6 ± 149.4

  1. *Significant between ICH and contralateral normal brain tissue by using a two-sided Mann-Whitney U test (p < 0.05); APTw, amide proton transfer-weighted; MTR, magnetization transfer ratio; ICH, intracranial hemorrhage; SWI, susceptibility weighted imaging.
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