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Related Experiment Videos

Penile bulb imaging.

Kent E Wallner1, Gregory S Merrick, Mark L Benson

  • 1Department of Radiation Oncology, Department of Veterans Affairs, Puget Sound Health Care System, Seattle, WA 98108-1597, USA.

International Journal of Radiation Oncology, Biology, Physics
|July 4, 2002
PubMed
Summary
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This study details the penile bulb

Area of Science:

  • Radiology
  • Radiation Oncology
  • Anatomy

Background:

  • Erectile dysfunction is a potential side effect of radiation therapy.
  • Penile bulb dosimetry is increasingly important for treatment planning and evaluation.
  • Detailed anatomical descriptions of the penile bulb across imaging modalities are lacking.

Purpose of the Study:

  • To describe the anatomical boundaries of the penile bulb.
  • To evaluate the penile bulb's appearance on computed tomography (CT), magnetic resonance imaging (MR), and transrectal ultrasound (TRUS).
  • To assess imaging changes before and after brachytherapy.

Main Methods:

  • Nonenhanced axial CT scans were acquired.
  • Nonenhanced MR images (T1- and T2-weighted) were obtained.

Related Experiment Videos

  • Transrectal ultrasound (TRUS) images were acquired using a stepper unit.

    • Main Results:

    • T2-weighted MR images best visualize the penile bulb as a hyperintense midline structure.
    • CT and TRUS provide good visualization of the penile bulb, with specific anatomical landmarks identified.
    • Edema post-brachytherapy can obscure the penile bulb; volumes range from 5.6 to 12.4 cc (median 8.1 cc).

    Conclusions:

    • Familiarity with penile bulb imaging is crucial for radiation oncology.
    • Incorporating penile bulb dosimetry into treatment planning can improve radiation delivery.
    • This can potentially reduce radiation-induced erectile dysfunction.