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Lung carcinoma: diffusion-weighted mr imaging--preliminary evaluation with apparent diffusion coefficient.

Munetaka Matoba1, Hisao Tonami, Tamaki Kondou

  • 1Department of Radiology, Kanazawa Medical University, Kahoku, Ishikaw, Japan. m-matoba@kanazawa-med.ac.jp

Radiology
|April 3, 2007
PubMed
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Diffusion-weighted magnetic resonance imaging (DW-MRI) using the SPLICE sequence can help characterize lung carcinomas. Apparent diffusion coefficients (ADCs) were higher in well-differentiated adenocarcinoma, suggesting potential for tissue differentiation.

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Area of Science:

  • Radiology
  • Oncology
  • Medical Imaging

Background:

  • Lung carcinoma diagnosis and characterization are crucial for effective treatment planning.
  • Diffusion-weighted magnetic resonance imaging (DW-MRI) offers insights into tissue microstructure.
  • The SPLICE sequence provides enhanced diffusion-weighted signals for improved imaging.

Purpose of the Study:

  • To evaluate the utility of DW-MRI with a SPLICE sequence for characterizing lung carcinomas.
  • To determine if apparent diffusion coefficients (ADCs) can differentiate between lung carcinoma subtypes.
  • To correlate ADC values with tumor cellularity in lung carcinomas.

Main Methods:

  • Prospective study involving 30 lung carcinoma patients.
  • DW-MRI using the SPLICE sequence was performed.
  • Apparent diffusion coefficients (ADCs) were calculated and compared among histologic types.
  • Correlation between ADCs and tumor cellularity was assessed in excised tumors.

Main Results:

  • Significant differences in ADCs were observed among lung carcinoma histologic types.
  • Adenocarcinoma showed higher ADCs compared to squamous cell and large-cell carcinomas.
  • Well-differentiated adenocarcinoma exhibited significantly higher ADCs than other subtypes and squamous cell carcinomas.
  • ADCs demonstrated a strong negative correlation with tumor cellularity (Spearman coefficient, -0.75; P < .02).

Conclusions:

  • DW-MRI with the SPLICE sequence can aid in the tissue characterization of lung carcinomas.
  • While ADCs overlap, well-differentiated adenocarcinoma tends to have higher ADCs.
  • ADC values correlate with tumor cellularity, offering potential for non-invasive assessment.