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Related Experiment Videos

Diffusion-weighted MR imaging for urinary bladder carcinoma: initial results.

Mitsuru Matsuki1, Yuki Inada, Fuminari Tatsugami

  • 1Department of Radiology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka, 569-8686, Japan. rad053@poh.osaka-med.ac.jp

European Radiology
|July 26, 2006
PubMed
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Free-breathing diffusion-weighted (DW) magnetic resonance (MR) imaging effectively detects urinary bladder cancer. This technique shows tumors as high signal intensity with lower apparent diffusion coefficient (ADC) values than surrounding tissues.

Area of Science:

  • Radiology
  • Oncology
  • Medical Imaging

Background:

  • Urinary bladder carcinoma detection often relies on invasive procedures.
  • Diffusion-weighted (DW) magnetic resonance (MR) imaging offers a non-invasive imaging modality.
  • Optimizing DW imaging for free-breathing scans is crucial for patient comfort and feasibility.

Purpose of the Study:

  • To assess the feasibility of free-breathing DW MR imaging for detecting urinary bladder cancer.
  • To evaluate the diagnostic performance of DW MR imaging compared to cystoscopic findings.
  • To analyze apparent diffusion coefficient (ADC) values of bladder tumors and surrounding structures.

Main Methods:

  • DW MR images were acquired in 15 patients with 17 urinary bladder carcinomas using a free-breathing, multisection spin-echo, single-shot echo planar sequence.

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  • Images were evaluated for tumor visibility against surrounding tissues.
  • Apparent diffusion coefficient (ADC) values were measured in tumors, urine, normal bladder wall, prostate, and seminal vesicles.

    • Main Results:

    • All 17 urinary bladder carcinomas were clearly visualized as high signal intensity on DW images.
    • Significantly lower ADC values were observed in carcinomas (1.18±0.19 x10⁻³ mm²/s) compared to urine, normal bladder wall, prostate, and seminal vesicles.
    • DW imaging demonstrated clear delineation of tumors from adjacent structures.

    Conclusions:

    • Free-breathing DW MR imaging is a feasible and effective method for detecting urinary bladder carcinoma.
    • Lower ADC values in tumors aid in their differentiation from normal tissues.
    • DW MR imaging shows potential for evaluating tumor invasion into surrounding structures.