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18F-FDG PET/CT及68Ga-FAPI PET/CT在淋巴瘤诊断中的价值对比

廖太平 张春银

廖太平, 张春银. 18F-FDG PET/CT及68Ga-FAPI PET/CT在淋巴瘤诊断中的价值对比[J]. 分子影像学杂志, 2023, 46(4): 597-604. doi: 10.12122/j.issn.1674-4500.2023.04.04
引用本文: 廖太平, 张春银. 18F-FDG PET/CT及68Ga-FAPI PET/CT在淋巴瘤诊断中的价值对比[J]. 分子影像学杂志, 2023, 46(4): 597-604. doi: 10.12122/j.issn.1674-4500.2023.04.04
LIAO Taiping, ZHANG Chunyin. Comparison of the value of 18F-FDG PET/CT and 68Ga-FAPI PET/CT in the diagnosis of lymphoma[J]. Journal of Molecular Imaging, 2023, 46(4): 597-604. doi: 10.12122/j.issn.1674-4500.2023.04.04
Citation: LIAO Taiping, ZHANG Chunyin. Comparison of the value of 18F-FDG PET/CT and 68Ga-FAPI PET/CT in the diagnosis of lymphoma[J]. Journal of Molecular Imaging, 2023, 46(4): 597-604. doi: 10.12122/j.issn.1674-4500.2023.04.04

18F-FDG PET/CT及68Ga-FAPI PET/CT在淋巴瘤诊断中的价值对比

doi: 10.12122/j.issn.1674-4500.2023.04.04
详细信息
    作者简介:

    廖太平,在读硕士研究生,E-mail: 2523649410@qq.com

    通讯作者:

    张春银,主任医师,E-mail: zhangchunyin345@sina.com

Comparison of the value of 18F-FDG PET/CT and 68Ga-FAPI PET/CT in the diagnosis of lymphoma

  • 摘要:   目的  比较18F-FDG PET/CT及68Ga-FAPI PET/CT对淋巴瘤的诊断价值,探究68Ga-FAPI PET/CT在淋巴瘤诊断中的应用前景。  方法  回顾性分析我院2020年1月~2022年12月淋巴瘤待诊的37例患者,对比其18F-FDG PET/CT及68Ga-FAPI PET/CT的最大标准摄取值(SUVmax)值及TBR值的差异,分别研究两种检查方法的SUVmax及TBR值与Ki67之间的相关性,并比较两种检查方法在淋巴瘤分期及浸润灶诊断上的差异。  结果  37例患者中有30例确诊为淋巴瘤。18F-FDG PET/CT的诊断效能高于68Ga-FAPI PET/CT。淋巴瘤患者中SUVmax-FDG>SUVmax-FAPI(17.35 vs 4.80),差异有统计学意义(P < 0.05);淋巴瘤患者中TBR-FDG>TBR-FAPI(29.35 vs 7.05),差异有统计学意义(P < 0.05)。SUVmax-FDG、TBR-FDG与Ki67之间呈正相关关系(SUVmax-FDG:R2=0.28,P < 0.05;TBR-FDG:R2=0.19,P < 0.05),SUVmax-FAPI、TBR-FAPI Ki67之间无相关性(P>0.05)。在检测淋巴瘤浸润方面,18F-FDG PET/CT优于68Ga-FAPI PET/CT。  结论  18F-FDG PET/CT诊断淋巴瘤的SUVmax及TBR值高于68Ga-FAPI PET/CT,在淋巴瘤的诊断和分期中具有更好的效果,可以更好地指导淋巴瘤的临床诊疗,但68Ga-FAPI PET/CT在淋巴瘤的诊断中仍具有很大的指导作用。

     

  • 图  1  18F-FDG PET/CT及68Ga-FAPI PET/CT的TBR诊断淋巴瘤的ROC曲线

    Figure  1.  ROC curve of TBR diagnosis of lymphoma by 18F-FDG PET/CT and 68Ga-FAPI PET/CT.

    图  2  MALT淋巴瘤的18F-FDG及68Ga-FAPI PET/CT图像

    Figure  2.  18F-FDG and 68Ga-FAPI PET/CT images of MALT lymphoma

    The patient is a 57-year-old woman who was admitted to the hospital due to abdominal pain for 3 months. A, E: MIP images showed a focal area of increased radiotracer accumulation (arrow) in the upper abdomen; B-D: On the 18F-FDG PET/CT images, a soft tissue mass adjacent to the abdominal aorta with a diameter of approximately 4.3 cm was seen, with increased radiotracer uptake (arrow), SUVmax of about 8.7, and TBR of about 17.4; F-H: On the 68Ga-FAPI PET/CT images, a focal area of increased radiotracer accumulation with a diameter of approximately 5.1 cm adjacent to the abdominal aorta was seen, with SUVmax of about 14.3 and TBR of about 15.9. The pathological result was MALT lymphoma.

    图  3  18F-FDG及68Ga-FAPI PET/CT检测肝浸润灶的对比图像

    Figure  3.  Comparison of 18F-FDG and 68Ga-FAPI PET/CT images for detecting liver infiltrates

    The patient was a 53-year-old woman who was admitted to the hospital due to a 10 d history of cough and sputum. A: MIP image showed multiple areas of increased radiotracer accumulation in the mediastinum and mid-abdomen; B-D: On the 18F-FDG PET/CT images, a slightly low-density nodule with increased radiotracer uptake (SUVmax was about 11.1, TBR was about 3.0) was seen at the top of the liver; E-G: Enlarged lymph nodes adjacent to the abdominal aorta were observed to be fused together, exhibiting increased radiotracer uptake (SUVmax was about 27, TBR was about 13). The spleen was also significantly enlarged with marked radiotracer accumulation; H-K: The 68Ga-FAPI PET/CT images showed no increased radiotracer uptake in the nodule at the top of the liver or spleen; L-N: The soft tissue mass adjacent to the abdominal aorta does not demonstrate uptake of radiotracer. The pathological result was diffuse large B-cell lymphoma.

    图  4  成人斯蒂尔病的18F-FDG及68Ga-FAPI PET/CT图像

    Figure  4.  18F-FDG and 68Ga-FAPI PET/CT images of adult-onset Still's disease

    The patient is a 37-year-old woman who experienced joint pain in all four limbs for 3 months. A、E: MIP images showed diffuse nodular and focal areas of increased radiotracer accumulation throughout the body, with splenomegaly and increased radiotracer uptake; B-D: On the 18F-FDG PET/CT images, lymph nodes in the mediastinum and bilateral axilla were enlarged, with increased radiotracer uptake and SUVmax of about 26.3 (indicated by the arrow); F-H: On the 68Ga-FAPI PET/CT images, multiple abnormal lymph nodes were seen, but no abnormal areas of radiotracer accumulation were observed. The pathological result was adult-onset Still's disease.

    图  5  18F-FDG及68Ga-FAPI PET/CT淋巴瘤骨髓浸润图像对比

    Figure  5.  Comparison of 18F-FDG and 68Ga-FAPI PET/CT images of lymphoma bone marrow infiltration

    The patient is a 36-year-old man who presented with multiple lymph node enlargements throughout the body for 1 month. A, H: MIP images, A: diffuse abnormal accumulation of radiopharmaceuticals throughout the body, including the axial bones, limb bones, scapulae, and pelvis, as well as diffuse radiopharmaceutical uptake; B-D: 18F-FDG PET/CT images showed multiple lymph nodes in the bilateral axillae and mediastinum with fusion and abnormal radiopharmaceutical accumulation, with a SUVmax of about 6.3; E-G: Diffuse abnormal radiopharmaceutical uptake in the bone marrow cavity of the pelvic bones, with a SUVmax of about 5.8; I-K: 68Ga-FAPI PET/CT showed lymph nodes in the mediastinum and bilateral axillae, with a SUVmax of about 5.5 and a TBR of about 5.0. No significant abnormal radiopharmaceutical accumulation was observed in the bones throughout the body in the MIP image (H) and figures; L-N: The pathological result was T-lymphoblastic lymphoma with bone marrow infiltration.

    图  6  脾脏弥漫大B细胞淋巴瘤的18F-FDG及68Ga-FAPI PET/CT图像

    Figure  6.  18F-FDG and 68Ga-FAPI PET/CT images of splenic diffuse large B-cell lymphoma

    The patient is a 35-year-old man with paroxysmal upper abdominal pain for 6 days. A, E: MIP images showed that both reveal significant tracer accumulation in the spleen; B-D: 18F-FDG PET/CT images demonstrated an enlarged spleen with a slightly low-density mass in the anterior portion, accompanied by significant tracer uptake with an SUVmax of approximately 27.9. There were also metabolically active lymph nodes with an SUVmax of approximately 9.2 in the surrounding area (indicated by arrows in figure A-D). F-H: 68Ga-FA-PI PET/CT images showed increased tracer uptake with an SUVmax of approximately 12.5 in the anterior portion of the spleen. Pathological results confirmed the diagnosis of diffuse large B-cell lymphoma of the spleen.

    表  1  淋巴瘤患者的特征

    Table  1.   Characteristics of patients with lymphoma

    Features Cases(n
    Gender
      Male 15
      Female 15
    Pathological results
      Diffuse large B-cell lymphoma 13
      Extranodal NK/T-cell lymphoma 5
      Follicular lymphoma 4
      MALT lymphoma 3
      Pediatric nodal marginal zone lymphoma 1
      T-cell lymphoblastic lymphoma 1
      Primary mediastinal large B-cell lymphoma 1
      Angioimmunoblastic T-cell lymphoma 1
      Cutaneous T-cell lymphoma 1
    Infiltration
      Nasopharynx 3
      Tonsil 3
      Sternocleidomastoid muscle 1
      Appendix 1
      Liver 3
      Spleen 7
      Small intestine 1
    下载: 导出CSV

    表  2  18F-FDG PET/CT和68Ga-FAPI PET/CT对淋巴瘤的诊断效能对比分析

    Table  2.   Comparison of diagnostic efficacy of 18F-FDG PET/CT and 68Ga-FAPI PET/CT in lymphoma (%)

    Radiopharmaceuticals Sensitivity Specificity Positive predictive value Negative predictive value Accuracy
    FDG 83.33 28.57 83.33 28.57 72.97
    FAPI 43.33 71.43 86.67 22.73 48.65
    FDG: Fluorodeoxyglucose; FAPI: Fibroblast activating protein inhibitor.
    下载: 导出CSV

    表  3  TBR-FAPI与TBR-FDG对淋巴瘤的诊断效能分析

    Table  3.   Diagnostic efficacy analysis of TBR-FAPI and TBR-FDG for lymphoma.

    Diagnostic methods Optimal threshold Sensitivity (%) Specificity (%) AUC Youden index P
    TBR-FDG 17.1 83.3 100 0.895 0.833 0.001
    TBR-FAPI 1.9 96.7 14.3 0.402 0.11 0.427
    下载: 导出CSV
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