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MRI of Prostate Cancer at 1.5 and 3.0 T: Comparison of Image Quality in Tumor Detection and Staging

Dirk Beyersdorff1, Kasra Taymoorian2, Thomas Knösel3, Dietmar Schnorr2, Roland Felix4, Bernd Hamm1 and Harald Bruhn4

1 Department of Radiology, Charité, Universitätsmedizin Berlin, Schumannstraße 20/21, Berlin 10117, Germany.
2 Department of Urology, Charité, Universitätsmedizin Berlin, Berlin 10117, Germany.
3 Institute of Pathology, Charité, Universitätsmedizin Berlin, Berlin 10117, Germany.
4 Department of Radiation Medicine, Charité, Universitätsmedizin Berlin, Berlin 10117, Germany.



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  		Fig. 1A —62-year-old man with prostate-specific antigen level of 6.3 ng/mL and biopsy-confirmed prostate cancer. Axial (A) and coronal (C) T2-weighted images acquired with torso phased-array coil at 3.0 T and corresponding images (axial, B and coronal, D) acquired with combined endorectal–body phased-array coil at 1.5 T. Note hypointense region in peripheral zone of posterolateral aspect on left (arrows) and less marked hypointensity on right. Extracapsular extension at either field strength is not seen. Images generated with endorectal coil have better overall image quality. Histology of prostatectomy specimen yielded stage pT2c tumor.

 


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  		Fig. 1B —62-year-old man with prostate-specific antigen level of 6.3 ng/mL and biopsy-confirmed prostate cancer. Axial (A) and coronal (C) T2-weighted images acquired with torso phased-array coil at 3.0 T and corresponding images (axial, B and coronal, D) acquired with combined endorectal–body phased-array coil at 1.5 T. Note hypointense region in peripheral zone of posterolateral aspect on left (arrows) and less marked hypointensity on right. Extracapsular extension at either field strength is not seen. Images generated with endorectal coil have better overall image quality. Histology of prostatectomy specimen yielded stage pT2c tumor.

 


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  		Fig. 1C —62-year-old man with prostate-specific antigen level of 6.3 ng/mL and biopsy-confirmed prostate cancer. Axial (A) and coronal (C) T2-weighted images acquired with torso phased-array coil at 3.0 T and corresponding images (axial, B and coronal, D) acquired with combined endorectal–body phased-array coil at 1.5 T. Note hypointense region in peripheral zone of posterolateral aspect on left (arrows) and less marked hypointensity on right. Extracapsular extension at either field strength is not seen. Images generated with endorectal coil have better overall image quality. Histology of prostatectomy specimen yielded stage pT2c tumor.

 


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  		Fig. 1D —62-year-old man with prostate-specific antigen level of 6.3 ng/mL and biopsy-confirmed prostate cancer. Axial (A) and coronal (C) T2-weighted images acquired with torso phased-array coil at 3.0 T and corresponding images (axial, B and coronal, D) acquired with combined endorectal–body phased-array coil at 1.5 T. Note hypointense region in peripheral zone of posterolateral aspect on left (arrows) and less marked hypointensity on right. Extracapsular extension at either field strength is not seen. Images generated with endorectal coil have better overall image quality. Histology of prostatectomy specimen yielded stage pT2c tumor.

 


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  		Fig. 2A —59-year-old man with prostate-specific antigen level of 8 ng/mL and biopsy-confirmed prostate cancer. Axial (A) and coronal (C) T2-weighted images acquired with torso phased-array coil at 3.0 T and corresponding images (axial, B and coronal, D) acquired with combined endorectal–body phased-array coil at 1.5 T. Note hypointense region in peripheral zone on right in posterolateral basal aspect with bulging of capsule (large arrows), asymmetry of neurovascular bundle, and moderately hypointense area in peripheral zone on left in posterolateral aspect (small arrow, A and B). Criteria for extracapsular extension are depicted at both field strengths.

 


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  		Fig. 2B —59-year-old man with prostate-specific antigen level of 8 ng/mL and biopsy-confirmed prostate cancer. Axial (A) and coronal (C) T2-weighted images acquired with torso phased-array coil at 3.0 T and corresponding images (axial, B and coronal, D) acquired with combined endorectal–body phased-array coil at 1.5 T. Note hypointense region in peripheral zone on right in posterolateral basal aspect with bulging of capsule (large arrows), asymmetry of neurovascular bundle, and moderately hypointense area in peripheral zone on left in posterolateral aspect (small arrow, A and B). Criteria for extracapsular extension are depicted at both field strengths.

 


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  		Fig. 2C —59-year-old man with prostate-specific antigen level of 8 ng/mL and biopsy-confirmed prostate cancer. Axial (A) and coronal (C) T2-weighted images acquired with torso phased-array coil at 3.0 T and corresponding images (axial, B and coronal, D) acquired with combined endorectal–body phased-array coil at 1.5 T. Note hypointense region in peripheral zone on right in posterolateral basal aspect with bulging of capsule (large arrows), asymmetry of neurovascular bundle, and moderately hypointense area in peripheral zone on left in posterolateral aspect (small arrow, A and B). Criteria for extracapsular extension are depicted at both field strengths.

 


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  		Fig. 2D —59-year-old man with prostate-specific antigen level of 8 ng/mL and biopsy-confirmed prostate cancer. Axial (A) and coronal (C) T2-weighted images acquired with torso phased-array coil at 3.0 T and corresponding images (axial, B and coronal, D) acquired with combined endorectal–body phased-array coil at 1.5 T. Note hypointense region in peripheral zone on right in posterolateral basal aspect with bulging of capsule (large arrows), asymmetry of neurovascular bundle, and moderately hypointense area in peripheral zone on left in posterolateral aspect (small arrow, A and B). Criteria for extracapsular extension are depicted at both field strengths.

 


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  		Fig. 2E —59-year-old man with prostate-specific antigen level of 8 ng/mL and biopsy-confirmed prostate cancer. E, Histology of prostatectomy specimen yielded pT3a tumor with extracapsular infiltration in posterolateral aspect on right (white arrow). Note prostate capsule (black arrow). Histology shows no extracapsular extension on left (H and E).

 

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