Bates T S, Gillatt D A, Cavanagh P M, Speakman M
Bristol Urological Institute, Southmend Hospital, UK.
Br J Urol. 1997 Jun;79(6):927-32. doi: 10.1046/j.1464-410x.1997.00188.x.
To assess the staging accuracy of endorectal magnetic resonance imaging (MRI), using a mid-field system, in patients with clinically localized prostate cancer and to compare the results with transrectal ultrasonography (TRUS).
Twenty patients with clinically localized prostate cancer were prospectively staged with TRUS and endorectal MRI using a 0.5 T magnet. All patients subsequently underwent radical prostatectomy and the results of pre-operative staging were compared with the histological findings.
The sensitivity and specificity for diagnosing capsular penetration were 38% and 100%, respectively, for endorectal MRI, and 23% and 86% for TRUS. The sensitivity and specificity for diagnosing seminal vesicle invasion were 100% and 94%, respectively, for endorectal MRI, and 33% and 100% for TRUS. The overall staging accuracy for endorectal MRI was 75% compared with 50% for TRUS.
Compared with TRUS, endorectal MRI with a 0.5 T magnet provided greater sensitivity and specificity for capsular penetration and increased sensitivity for seminal vesicle invasion.
使用中场系统评估直肠内磁共振成像（MRI）对临床局限性前列腺癌患者的分期准确性，并将结果与经直肠超声检查（TRUS）进行比较。
对20例临床局限性前列腺癌患者采用0.5T磁体进行TRUS和直肠内MRI前瞻性分期。所有患者随后均接受了根治性前列腺切除术，并将术前分期结果与组织学检查结果进行比较。
直肠内MRI诊断包膜侵犯的敏感性和特异性分别为38%和100%，TRUS分别为23%和86%。直肠内MRI诊断精囊侵犯的敏感性和特异性分别为100%和94%，TRUS分别为33%和100%。直肠内MRI的总体分期准确性为75%，而TRUS为50%。
与TRUS相比，0.5T磁体的直肠内MRI对包膜侵犯具有更高的敏感性和特异性，对精囊侵犯的敏感性也有所提高。
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