Radiation Therapy

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Our radiologists lead the way in prostate imaging. We offer the newest techniques to better detect and stage prostate cancer. Call 310-481-7545 to find out more about prostate imaging and treatment options.


  • 69 year-old, BPH gradual
  • PSA rise 1.6 → 4.8 ng/dl
  • Abnormal digital rectal exam → Biopsy: Gleason 5+4=9


Radiation Therapy Follow-Up

LEFT: T2-weighted image prior to treatment shows large, low-signal mass (yellow oval) on the right crossing midline anteriorly

RIGHT: Color perfusion map shows correspondingly increased perfusion (yellow-green pixels) with washout (red pixels)

Radiation therapy images of decreased prefusion

LEFT: T2-weighted image after treatment shows normalization of T2 signal with reappearance of the normal peripheral-transitional zone border.

RIGHT: Color perfusion map shows correspondingly decreased perfusion (blue pixels) consistent with response to treatment.

Example Report (Prior to Therapy) test

* Findings

No suspicious lymph nodes or bone lesions
Prostate measures 58 gm with mild prostatic hyperplasia
A single suspicious area is identified:

Location Bilateral anterior & right posterior
Size 2.8 cm
Capsule Involvement posterolaterally
T2 Asymmetric, ill-defined
Perfusion Abnormal
Overall suspicion High (4/5)

Seminal vesicles and neurovascular bundles appear normal

* Impression

  1. Technical quality: excellent
  2. Large right lesion crosses midline anteriorly and extends to capsule
  3. Organ-confined disease - no suspicious lymph nodes or bone lesions

Advantage: UCLA Prostate MRI

  • Although PSA remains the mainstay of treatment monitoring, MRI can add value when there is concern for residual disease
  • Removable table (GE HDxt or Siemens Skyra) allows for imaging after external patient mold is applied for registration with radiation planning.