Vatsa Rakhee, Kumar Rohit, Shukla Jaya, Rana Nivedita, Vadi Shelvin Kumar, Lal Anupam, Singh Shrawan Kumar, Mittal Bhagwant Rai
Department of Nuclear Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Department of Radiodiagnosis, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
World J Nucl Med. 2021 Feb 12;20(2):156-163. doi: 10.4103/wjnm.WJNM_46_20. eCollection 2021 Apr-Jun.
Prostate cancer (PCa) is one of the major causes of death due to cancer in men. Conventional imaging modalities such as magnetic resonance imaging (MRI) provide locoregional status, but fall short in identifying distant metastasis. C-11 choline F-18 fluorocholine (F-18 FCH) has been shown to be useful in imaging of PCa. The present prospective study evaluates and compares the role of F-18 FCH positron emission tomography-computed tomography (PET-CT) with locoregional MRI and whole-body bone scintigraphy in PCa patients for initial staging and recurrence evaluation. This study included a total of 50 patients. Tc-99m skeletal scintigraphy, F-18 FCH PET-CT, and diffusion-weighted MRI of the pelvic region were performed within a span of 2-3 weeks of each other, in random order. For the primary site, core biopsy findings of the lesion were considered as gold standard. The kappa test was used to measure agreement between bone scintigraphy, F-18 FCH, and MRI. For comparing Tc-99m bone scintigraphy, F-18 FCH, and MRI, McNemar's test was applied. F-18 FCH PET-CT and MRI were able to detect primary lesion in all initial staging patients. The sensitivity and specificity of F-18 FCH PET-CT versus MRI were found to be 92.8% versus 89.2% and 100 versus 80%, respectively, for the recurrence at the primary site. A total of 55 bony lesions at distant sites were detected on F-18 FCH PET-CT in comparison to 43 bone lesions on whole-body bone scintigraphy. F-18 FCH PET/CT also detected additional lung lesions in 2 patients and abdominal lymph nodes in 12 patients. F-18 FCH PET-CT could detect primary lesions, local metastasis, bone metastasis, and distant metastasis in a single study and is also a useful modality in recurrence evaluation in PCa patients.
前列腺癌(PCa)是男性因癌症死亡的主要原因之一。传统成像方式如磁共振成像(MRI)可提供局部区域状况,但在识别远处转移方面存在不足。碳-11胆碱、氟-18氟胆碱(F-18 FCH)已被证明在前列腺癌成像中有用。本前瞻性研究评估并比较了F-18 FCH正电子发射断层扫描-计算机断层扫描(PET-CT)与局部区域MRI及全身骨闪烁显像在前列腺癌患者初始分期和复发评估中的作用。本研究共纳入50例患者。锝-99m骨闪烁显像、F-18 FCH PET-CT及盆腔区域的扩散加权MRI在彼此间隔2至3周的时间内随机顺序进行。对于原发部位,病变的核心活检结果被视为金标准。kappa检验用于测量骨闪烁显像、F-18 FCH及MRI之间的一致性。为比较锝-99m骨闪烁显像、F-18 FCH及MRI,应用了McNemar检验。F-18 FCH PET-CT和MRI能够在所有初始分期患者中检测到原发病变。对于原发部位复发,F-18 FCH PET-CT与MRI的敏感性和特异性分别为92.8%对89.2%以及100%对80%。F-18 FCH PET-CT共检测到55处远处骨病变,而全身骨闪烁显像检测到43处骨病变。F-18 FCH PET/CT还在2例患者中检测到额外的肺部病变,在12例患者中检测到腹部淋巴结病变。F-18 FCH PET-CT能够在单次检查中检测到原发病变、局部转移、骨转移及远处转移,也是前列腺癌患者复发评估中的一种有用方式。