Comparison of diffusion weighted MRI parameters of mediastinal lymph nodes with PET/CT in lung cancer patients

Yıl 2014, Cilt: 27 Sayı: 1, 21 - 26, 30.09.2015

Onur Buğdaycı Mehmet Nihat Kodallı Fuat Dede İsmet Cengiç Derya Türeli Hilal Altaş Aydın Ahmet Aslan

https://doi.org/10.5472/MMJ.2013.03242.1

Cited By: 1

Öz

ABSTRACT
Objective: We have compared diffusion-weighted magnetic
resonance imaging (DW-MRI) properties of mediastinal lymph
nodes in lung cancer patients with positron emission tomography/
computed tomography (PET/CT) findings.
Patients and Methods: Twenty-one consecutive untreated
patients with lung cancer were included. DW-MRI was performed
on a 1,5T scanner with b values of 50, 500 and 1000. Additional
MR imaging was performed for anatomical correlation.
Results: A total of 47 lymph nodes were analyzed. While no
correlation was found between minimum apparent diffusion
coefficient (ADC) values (ADCmin) of lymph nodes and their
maximum standardized uptake values (SUVmax) on PET/CT,
ADCmin ratios of lymph nodes to main lesion (ADCmin Node/
Lesion) (r = - 0.407; p = 0.005) and lymph node to cerebrospinal
fluid (ADCmin Node/CSF) (r = - 0.364; p = 0.012) were correlated
with SUVmax. Cutoff values for DW-MRI parameters were
determined using ROC analysis. Six lymph nodes were
histopathologically examined. Both methods correctly identified
one metastatic and two metastasis negative lymph nodes, while
staging one lymph node with granulomatous change as metastasis
positive. Two metastasis negative lymph nodes, reported as
suspicious on PET/CT, were correctly staged on DW-MRI.
Conclusion: Our findings indicate that DW-MRI could be at
least as valuable as PET/CT in mediastinal staging of patients with
lung cancer.

Anahtar Kelimeler

Difüzyon manyetik rezonans görüntüleme, Pozitron-emisyon tomografi/Bilgisayarlı tomografi, Akciğer tümörleri, Lenf nodları, Mediasten

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