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Table 2 Results of Quantitative Image quality comparison between iShim- and SS-EPI-DWI

From: Integrated slice-specific dynamic shimming diffusion weighted imaging (DWI) for rectal Cancer detection and characterization

    SDbackground SNR CNR
Cohort    Values t P Ratio t P Ratio t P
Total DWI b1000 5.99 ± 1.59 – – –
b800 6.34 ± 2.49 1.144 0.254
b1600 4.53 ± 1.51 −6.54 < 0.001*
ADC Map SS-EPI 174.68 ± 116.46 −7.174 < 0.001*
iShim 88.3 ± 31.43
Primary
rectal
tumor 		DWI b1000 5.96 ± 1.56 – 22.57 ± 8.66 – 10.81 ± 5.83 –
b800 6.11 ± 2.44 0.436 0.063 41.26 ± 17.02 8.157 < 0.001* 21.53 ± 11.46 6.948 < 0.001*
b1600 4.49 ± 1.54 −5.542 < 0.001* 35.35 ± 14.76 6.208 < 0.001* 22.59 ± 11.95 7.39 < 0.001*
ADC Map SS-EPI 179.71 ± 134.98 −5.46 < 0.001* – –
iShim 91.2 ± 29.51
After treatment DWI b1000 6.08 ± 1.71 – – –
b800 6.93 ± 2.57 1.432 0.158
b1600 4.64 ± 1.43 −3.399 0.001*
ADC Map SS-EPI 162.59 ± 49.08 −7.108 < 0.001*
iShim 80.77 ± 35.44
  1. P with * suggested statistical significance. All the t and P values are the comparison between b = 800 s/mm2 of iShim-DWI and b = 1000 s/mm2 of SS-EPI-DWI, b = 1600 s/mm2 of iShim-DWI and b = 1000 s/mm2 of SS-EPI-DWI for each DWI item
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Cancer Imaging

ISSN: 1470-7330

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