Preoperative staging of non-small cell lung cancer: prospective comparison of PET/MR and PET/CT |
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Authors: | Sang Min Lee Jin Mo Goo Chang Min Park Soon Ho Yoon Jin Chul Paeng Gi Jeong Cheon Young Tae Kim Young Sik Park |
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Institution: | 1.Department of Radiology,Seoul National University College of Medicine,Seoul,Korea;2.Institute of Radiation Medicine,Seoul National University Medical Research Center,Seoul,Korea;3.Department of Radiology and Research Institute of Radiology,University of Ulsan College of Medicine,Seoul,Korea;4.Cancer Research Institute,Seoul National University College of Medicine,Seoul,Korea;5.Department of Nuclear Medicine,Seoul National University College of Medicine,Seoul,Korea;6.Department of Thoracic and Cardiovascular Surgery,Seoul National University College of Medicine,Seoul,Korea;7.Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine,Seoul National University Hospital,Seoul,Korea;8.Department of Internal Medicine,Seoul National University College of Medicine,Seoul,Korea |
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Abstract: | ObjectivesTo prospectively compare the accuracies of PET/MR and PET/CT in the preoperative staging of non-small cell lung cancer (NSCLC).MethodsInstitutional review board approval and patients’ informed consents were obtained. 45 patients with proven or radiologically suspected lung cancer which appeared to be resectable on CT were enrolled. PET/MR was performed for the preoperative staging of NSCLC followed by PET/CT without contrast enhancement on the same day. Dedicated MR images including diffusion weighted images were obtained. Readers assessed PET/MR and PET/CT with contrast-enhanced CT. Accuracies of PET/MR and PET/CT for NSCLC staging were compared.ResultsPrimary tumour stages (n?=?40) were correctly diagnosed in 32 patients (80.0 %) on PET/MR and in 32 patients (80.0 %) on PET/CT (P?=?1.0). Node stages (n?=?42) were correctly determined in 24 patients (57.1 %) on PET/MR and in 22 patients (52.4 %) on PET/CT (P?=?0.683). Metastatic lesions in the brain, bone, liver, and pleura were detected in 6 patients (13.3 %). PET/MR missed one patient with pleural metastasis while PET/CT missed one patient with solitary brain metastasis and two patients with pleural metastases (P?=?0.480).ConclusionsThis study demonstrated that PET/MR in combination with contrast-enhanced CT was comparable to PET/CT in the preoperative staging of NSCLC while reducing radiation exposure. Key points ? PET/MR can be comparable to PET/CT for preoperative NSCLC staging.? PET/MR and PET/CT show excellent correlation in measuring SUVmax of primary lesions.? Using PET/MR, estimated radiation dose can decrease by 31.1?% compared with PET/CT. |
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