Transrectal ultrasonography

Transrectal ultrasound image

Transrectal ultrasonography (TRUS) is a diagnostic medical imaging technique used primarily to visualize the prostate gland and surrounding tissues. It involves the use of an ultrasound probe inserted into the rectum to obtain detailed images of the prostate and is commonly used in the evaluation of prostate conditions, including prostate cancer.

Procedure

The procedure is typically performed with the patient lying on their side with knees bent. A lubricated ultrasound probe is gently inserted into the rectum. The probe emits sound waves that bounce off the prostate and surrounding tissues, creating echoes that are converted into images by a computer. These images are displayed on a monitor and can be used to assess the size, shape, and texture of the prostate.

Uses

Transrectal ultrasonography is used for several purposes, including:

• Prostate Cancer Detection: TRUS is often used in conjunction with a prostate biopsy to detect prostate cancer. It helps guide the biopsy needle to specific areas of the prostate.
• Prostate Volume Measurement: It provides accurate measurements of prostate volume, which is important in the diagnosis and management of benign prostatic hyperplasia (BPH).
• Guidance for Procedures: TRUS is used to guide certain procedures, such as the placement of brachytherapy seeds for prostate cancer treatment.

Advantages and Limitations

TRUS is a minimally invasive procedure that provides real-time imaging and is generally well-tolerated by patients. However, it has limitations, including:

• Limited Field of View: The probe's position in the rectum limits the field of view to the posterior and lateral aspects of the prostate.
• Operator Dependency: The quality of the images and the accuracy of the procedure can depend on the skill and experience of the operator.

Related Pages

• Prostate cancer
• Ultrasound
• Prostate biopsy
• Benign prostatic hyperplasia