定量MRI生物标志物用于临床显著前列腺癌的分类:对回声时间的可重现性进行校准
Karoline Kallis1, Christopher C Conlin2, Courtney Ollison1
1Department of Radiation Medicine and Applied Sciences, UC San Diego Health, La Jolla, California, USA.
Journal of applied clinical medical physics
|October 7, 2024
概括
一种新的校准方法标准化了MRI回声时间,提高了用于检测临床显著前列腺癌 (csPCa) 的限制频谱成像限制得分 (RSIrs) 的准确性. 这将使回声时间诱导的错误减少高达72%.
科学领域:
- 放射学和成像科学 放射学和成像科学
- 医学物理 医学物理
- 瘤学研究研究
背景情况:
- 限制频谱成像限制得分 (RSIrs) 显示为临床显著前列腺癌 (csPCa) 的定量生物标志物具有前景.
- 在MRI采集过程中回声时间 (TE) 的差异可以在RSIrs测量中引入变化,阻碍其临床应用.
- 在不同MRI协议中标准化RSIrs测量对于其在前列腺癌检测中的可靠使用至关重要.
研究的目的:
- 开发和验证一种线性校准方法,以纠正限制光谱成像 (RSI) 中回声时间 (TE) 变化.
- 为了使限制谱成像限制得分 (RSIrs) 能够作为检测临床显著前列腺癌 (csPCa) 的可靠定量生物标志物.
- 为了减少RSIrs测量的回声时间诱导的错误,以提高诊断准确度.
主要方法:
- 分析了197名接受MRI和活检的患者队列,其中97人被诊断患有csPCa.
- 在最低 TE (~75 ms) 和 TE = 90 ms 时获得了 RSI 数据.
- 采用线性回归模型,将在TE=90毫秒获得的C图校准为参考TE (~75毫秒),并以RSIrs.的98百分位进行比较.
主要成果:
- 校准方法显著减少了RSIrs测量的TE诱导偏差.
- 在校准后,RSIrs的绝对误差在非csPCa情况下减少了72%,在csPCa情况下减少了55%.
- 与未经校正的值相比,校准的RSIrs在区分csPCa方面表现得更好.
结论:
- 拟议的线性校准方法有效地标准化了RSIrs在不同回声时间上的测量.
- 这种校准大大减少了回声时间引起的错误,提高了RSIrs作为定量生物标志物的可靠性.
- 该方法促进了RSIrs的临床应用,以准确检测临床上显著的前列腺癌.
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