What Is a Prostate Ultrasound?

A prostate ultrasound uses high-frequency sound waves to create real-time images of the prostate and nearby structures. It does not use ionizing radiation.

The examination may help:

• Measure prostate volume
• Evaluate benign prostate enlargement
• Investigate urinary symptoms
• Examine prostate abnormalities
• Assess the bladder and residual urine
• Support fertility evaluation
• Guide a prostate biopsy or another procedure
• Plan treatment for BPH

The appropriate ultrasound method depends on the reason for testing.

Who Should Consider a Prostate Ultrasound?

A urologist may recommend ultrasound for patients experiencing:

• Frequent urination
• Nighttime urination
• Sudden urinary urgency
• Weak or interrupted urine flow
• Difficulty starting urination
• Straining during urination
• Incomplete bladder emptying
• Urinary retention
• Recurrent urinary infections
• Blood in the urine
• Pelvic or prostate discomfort
• Abnormal digital rectal examination
• Elevated or changing PSA
• Male infertility concerns

Ultrasound findings must be interpreted together with symptoms, examination results, laboratory testing, and medical history.

Types of Prostate Ultrasound

Transabdominal Prostate Ultrasound

A transabdominal ultrasound is performed by moving a probe over the lower abdomen.

It may evaluate:

• Approximate prostate size
• Bladder structure
• Bladder stones
• Urinary retention
• Urine remaining after voiding
• Kidneys and upper urinary tract when included

A comfortably full bladder is often required before the scan.

Transrectal Ultrasound

A transrectal ultrasound, commonly abbreviated as TRUS, uses a narrow ultrasound probe placed gently inside the rectum.

Because the prostate lies directly in front of the rectum, TRUS can provide more detailed images and measurements than an abdominal scan.

It may be used to:

• Measure prostate volume precisely
• Evaluate internal prostate structure
• Investigate an abnormal examination
• Assess certain infertility concerns
• Guide prostate biopsy
• Support BPH treatment planning

RadiologyInfo lists prostate enlargement, abnormal growths, urinary difficulty, abnormal examination findings, and elevated blood-test results among common reasons for transrectal prostate ultrasound. RadiologyInfo: Prostate Ultrasound

Transabdominal vs. Transrectal Ultrasound

A transabdominal scan is less invasive and can evaluate the bladder, urinary retention, and approximate prostate size.

A transrectal scan provides more detailed prostate imaging and more precise volume measurements. It is also commonly used to guide biopsy procedures.

The urologist may recommend one or both examinations according to the clinical concern.

What Can a Prostate Ultrasound Detect?

A prostate ultrasound may identify or evaluate:

• Enlarged prostate
• Prostate volume
• Changes in prostate shape
• Calcifications
• Cysts
• Areas requiring additional evaluation
• Abscesses in selected cases
• Seminal vesicle abnormalities
• Bladder-wall changes
• Residual urine
• Urinary obstruction-related findings

An ultrasound result alone may not determine whether an abnormal area is benign, inflammatory, or cancerous.

Prostate Ultrasound for BPH

Benign prostatic hyperplasia, or BPH, is a noncancerous enlargement of the prostate.

Ultrasound can help evaluate:

• Prostate size
• Bladder-wall changes
• Residual urine after voiding
• Possible urinary obstruction
• Treatment and procedure planning

Transabdominal ultrasound may measure the prostate and post-void residual urine, while TRUS may provide more exact sizing for BPH procedure planning. RadiologyInfo: BPH Diagnosis

Prostate Ultrasound and PSA Testing

PSA is a blood test that measures prostate-specific antigen. An elevated PSA can occur with:

• Benign prostate enlargement
• Prostatitis
• Urinary infection
• Recent urinary procedures
• Ejaculation
• Prostate cancer
• Other prostate irritation

A prostate ultrasound may provide additional structural information, but it cannot explain every PSA elevation or independently rule out cancer.

Depending on the case, the doctor may recommend repeat PSA testing, prostate MRI, biomarker tests, or biopsy.

Can Ultrasound Diagnose Prostate Cancer?

A prostate ultrasound may identify an abnormal area, but it cannot confirm or exclude prostate cancer by itself.

When cancer is suspected, evaluation may include:

• PSA testing
• Digital rectal examination
• Multiparametric prostate MRI
• Prostate biopsy
• Pathological tissue examination

A biopsy is required to confirm a prostate cancer diagnosis.

Ultrasound-Guided Prostate Biopsy

Ultrasound provides real-time imaging that can help guide a biopsy needle into the prostate.

Biopsy access may be:

• Transperineal, through the skin between the scrotum and anus
• Transrectal, through the rectal wall

The ultrasound probe may still be placed in the rectum to display the prostate during either approach. Tissue samples are sent to a laboratory for pathological examination.

Biopsy is a separate procedure from a diagnostic ultrasound and involves additional preparation, anesthesia, risks, and recovery.

Prostate Ultrasound for Male Infertility

TRUS may be considered when infertility evaluation suggests:

• Ejaculatory duct obstruction
• Low semen volume
• Azoospermia
• Seminal vesicle abnormalities
• Reproductive tract cysts
• Painful ejaculation
• Blood in the semen

It is generally combined with semen analysis, hormone testing, and physical examination.

How to Prepare for a Transabdominal Ultrasound

Preparation may include:

• Drinking water before the appointment
• Arriving with a comfortably full bladder
• Avoiding urination until initial images are taken
• Wearing easily adjustable clothing
• Bringing previous imaging and PSA results

The clinic will specify how much water to drink and when.

After initial imaging, the patient may be asked to urinate so the clinic can measure post-void residual urine.

How to Prepare for a Transrectal Ultrasound

Preparation requirements vary. The clinic may advise:

• Using an enema before the examination
• Emptying the rectum
• Taking regular medication as instructed
• Reporting rectal bleeding or disease
• Reporting previous rectal surgery
• Informing the doctor about blood thinners
• Bringing PSA and MRI results

Antibiotics are not routinely required for a simple ultrasound without biopsy unless the clinic has a specific medical reason.

What Happens During Transabdominal Ultrasound?

The patient generally lies on an examination table while gel is applied to the lower abdomen.

The clinician moves the ultrasound probe over the skin to examine:

• Bladder
• Prostate
• Urinary tract structures
• structures
• Residual urine when requested

The examination is noninvasive and usually causes minimal discomfort.

What Happens During Transrectal Ultrasound?

The patient usually lies on one side with the knees bent. A covered, lubricated probe is gently inserted a short distance into the rectum.

The clinician then:

1. Examines the prostate from multiple angles.
2. Measures its dimensions and volume.
3. Reviews internal structure.
4. Assesses nearby seminal vesicles when needed.
5. Saves images for interpretation.

Patients may feel pressure or mild discomfort. A diagnostic TRUS is generally completed relatively quickly.

Is Prostate Ultrasound Painful?

A transabdominal scan is generally painless, although maintaining a full bladder can feel uncomfortable.

A transrectal ultrasound may cause pressure or mild discomfort. Significant pain is uncommon and should be reported immediately.

Patients with anal fissures, severe hemorrhoids, rectal inflammation, or previous rectal surgery should notify the clinic in advance.

Are There Risks?

Diagnostic ultrasound does not use radiation and generally has a strong safety profile.

A simple transrectal ultrasound may cause temporary:

• Rectal pressure
• Mild discomfort
• Minor irritation

Biopsy-guided ultrasound involves separate risks, including bleeding, infection, urinary difficulty, and pain. These risks relate primarily to the biopsy rather than ultrasound imaging itself.

Additional Prostate Tests

Depending on symptoms and findings, the urologist may recommend:

• Urinalysis and urine culture
• PSA testing
• Kidney function testing
• Urinary flow measurement
• Post-void residual testing
• Digital rectal examination
• Cystoscopy
• Urodynamic testing
• Prostate MRI
• Prostate biopsy
• Semen analysis

Not every patient requires every examination.

Understanding Prostate Volume

Prostate volume is interpreted according to:

• Age
• Urinary symptoms
• PSA level
• Urine-flow results
• Residual urine
• Medication use
• Treatment goals
• Planned BPH procedure

A larger prostate does not always cause more severe symptoms. The prostate’s shape and relationship to the urethra also matter.

Post-Void Residual Urine Test

Post-void residual testing measures how much urine remains in the bladder after urination.

An elevated residual volume may be associated with:

• Prostate obstruction
• Urethral narrowing
• Weak bladder contraction
• Neurological conditions
• Medication effects

The result can help guide BPH and bladder treatment.

Prostate Ultrasound for International Patients

Busan offers prostate ultrasound through urology clinics, imaging centers, and hospitals. English-language support varies by facility.

International patients should bring:

• Previous prostate ultrasound images
• PSA test results
• Prostate MRI records
• A list of medications
• Information about blood thinners
• Prostate biopsy or surgery records
• Urine-flow test results
• Semen analysis results when relevant
• Details of urinary symptoms

Patients should confirm whether a full bladder, enema, or other preparation is required.

How Long Does the Examination Take?

A routine prostate ultrasound may be completed during one outpatient appointment. The total visit may take longer when combined with:

• Medical consultation
• Urine testing
• PSA testing
• Urinary flow testing
• Post-void residual measurement
• Biopsy planning

Result timing depends on whether the urologist interprets the scan during the visit or a separate radiology report is prepared.

Prostate Ultrasound Cost in Busan

The total cost may depend on:

• Urology consultation
• Transabdominal ultrasound
• Transrectal ultrasound
• Kidney and bladder imaging
• Post-void residual testing
• Urinary flow testing
• PSA and blood testing
• Prostate MRI
• Biopsy guidance
• Medical certificates
• Follow-up consultation

Patients should request an individualized estimate based on the required examination.

When Should You Seek Urgent Medical Care?

Seek urgent evaluation for:

• Complete inability to urinate
• High fever or shaking chills
• Severe pelvic or lower-abdominal pain
• Significant blood or clots in the urine
• Severe weakness or confusion
• Rapidly worsening urinary symptoms
• Fever and pain after a recent prostate procedure
• Reduced urine output

These symptoms may indicate acute prostatitis, urinary retention, severe infection, or another urgent condition.

Frequently Asked Questions

Do I need a full bladder for prostate ultrasound?

A full bladder is commonly required for transabdominal imaging. It is generally not required in the same way for transrectal ultrasound.

Does a prostate ultrasound use radiation?

No. Ultrasound creates images with sound waves and does not use ionizing radiation.

Can ultrasound diagnose an enlarged prostate?

Yes. It can measure prostate size and assess related bladder-emptying concerns.

Can ultrasound rule out prostate cancer?

No. Ultrasound alone cannot reliably exclude cancer. PSA testing, MRI, and biopsy may be necessary based on risk.

Is a transrectal ultrasound the same as a prostate biopsy?

No. TRUS is an imaging examination. It may guide a biopsy, but tissue collection is a separate procedure.

Can international patients receive prostate ultrasound in Busan?

Yes. International patients can receive transabdominal or transrectal prostate imaging, urinary testing, and urology consultation in Busan.