What is MRI with Transrectal Ultrasound Fusion-Guided Prostate Biopsy

Prostate cancer has a new standard of care in MRI-guided fusion biopsy with transrectal ultrasound. While a prostate biopsy has been the only way to get a definitive diagnosis of prostate cancer, it has only been working if cancer cells are identified in the sample tissue. But in some cases, such as when the tumor occurs at the top surface of the prostate or other unusual locations, a biopsy may not give a correct diagnosis. For instance, the standard TRUS (transrectal ultrasound) guided biopsy in which tissue samples are collected from the prostate in a systematic pattern gives a negative result with tumors located in unusual areas of the prostate. About 15-20 percent of tumor locations can be missed by the biopsy needle.

What makes the MRI-ultrasound fusion biopsy more definitive?

The MRI-ultrasound fusion approach is an improvement on the traditional 12-core TRUS, which involved taking biopsies from twelve prostate areas where the cancer is considered more likely to occur. With the TRUS biopsy, about 70 percent of men who have a negative biopsy result are not essentially free of the cancer. The MRI-ultrasound fusion technology blends the superior imaging capability of the high-definition multi-parametric (mp) MRI with real-time ultrasound imaging. There is better visualization of the suspicious areas of the prostate where the cancer may occur that may not be visible on ultrasound alone. The fusion-guided biopsy detects almost twice as many prostate cancers in all stages as the standard TRUS biopsy.

The ability of MRI-ultrasound fusion-guided biopsy to create a three-dimensional (3D) map of the prostate ensures that doctors are able to see the targeted areas of the prostate better and perform more precise biopsies. The technology uses a machine known as UroNav developed by Invivo, which is supplied with sophisticated software to produce super-detailed MRI images and fuse them with the ultrasound images generated by a transrectal probe administered on the patient in an outpatient setting. The resulting images enable the examining physician to direct biopsy needles with pinpoint accuracy and to easily access any lesions or suspicious areas revealed by MRI. The technology allows the urologist to hit the target spot more accurately and improves cancer detection rate. In fact, it is primarily used for men who have an ongoing suspicion of prostate cancer, such as those with consistently elevated PSA, but whose TRUS biopsy results are repeatedly negative.

Fewer biopsies, more accurate detection

The fusion-guided biopsy is a very targeted approach in which biopsies are performed only in highly suspicious areas of the prostate appearing in the MRI image. As a result, significantly fewer biopsies are done with the MRI-ultrasound fusion than with the traditional TRUS technique, minimizing the adverse effects that often accompany repeat biopsies. Multiple prostate biopsies can lead to complications such as bleeding, infection, urinary retention problems, sepsis or even death.

In spite of fewer biopsies, the MRI fusion approach increases the rate of detection of aggressive prostate cancer. The extensive MRI images obtained before the biopsy helps highlight both high-risk and intermediate-risk cancers often missed by traditional TRUS biopsy. With MRI-ultrasound fusion, the likelihood of detecting cancer increases as the grade of the tumor increases. The use of MRI fusion biopsy helps to avoid metastatic disease by finding cancer before it spreads to other areas of the body.

Improved cancer differentiation

Through MRI fusion, doctors are able to more accurately differentiate cancers that require treatment from the ones that should undergo watchful waiting (active surveillance). Fusion technology is able to show higher-risk cancers and does not highlight the insignificant low-grade tumors, making it less likely for urologic oncologists to over-treat indolent and low-grade cancers. A number of prostate cancers are low-grade, non-aggressive and do not cause problems at all and treating them through chemotherapy, radiotherapy or surgery can impair the quality of life or even cause death. MRI fusion effectively saves patients from the adverse effects of treating low-grade tumors. Fusion technology eliminates up to 50 percent of prostate cancer treatments that are unnecessarily administered on low-grade cancers.

At Advanced Urology Institute, we have adopted the MRI-ultrasound fusion biopsy and changed the way we screen, evaluate and diagnose prostate cancer. It has become our standard for detecting prostate cancer and we believe in the next few years it will be the gold standard for detecting the cancer. We are proud that it offers a higher detection rate, superior accuracy and reduces the rate of repeat biopsies — making our practice one of the best places for detection and monitoring of the cancer. It helps us deliver the best treatment outcomes for our patients.

If you think you are at high risk of prostate cancer or already have started experiencing some symptoms, let us show you how the precision of our high-definition MRI fusion machine, the expertise of our skilled physicians in MRI fusion biopsy and the know-how of our radiologists proficient in multi-parametric MRI imaging can help you. For more information on the treatment and diagnosis of prostate cancer, visit the “Advanced Urology Institute” site.

Effective Ways To Detect Prostate Cancer

If you are a man, there is a 1-in-6 chance that you will develop prostate cancer at some point in your life. Prostate cancer is basically a tumor of the prostate, the gland located in front of the rectum and just below the bladder. The prostate helps in making the milky fluid called semen, which carries sperm out of the body during ejaculation. Prostate cancer is most common among men over 65 years of age and fairly prevalent in men aged 50-64 years. Still, the cancer can occur in younger men below 50 and screening for it should begin between 40 and 45 years of age.

Risk factors of the cancer include:

  • (Age
  • Obesity
  • Family history
  • Race
  • History of STDs (sexually transmitted diseases)
  • Diets high in fats from red meat

While prostate cancer is a highly treatable condition, many men suffer needlessly because they did not know the symptoms in order to catch it before the advanced stages. And though the cancer typically shows few signs until it has reached advanced stages, knowing the symptoms can be the difference between having to face surgery and just making a few lifestyle changes. The symptoms of prostate cancer include:

In some instances of early prostate cancer, no symptoms occur and the cancer can only be detected through routine screenings.

Effective Ways to Detect Prostate Cancer

Your urologist will start by asking you about your medical history, symptoms and risk factors. A physical examination will also be performed. The doctor will then request a prostate-specific antigen (PSA) test to analyze your blood sample for higher-than-normal levels of the prostate-specific antigen, which is a protein secreted by the prostate gland. Higher PSA levels may indicate presence of cancer. In some cases, your doctor will opt to use the PSA3 test to check for levels of antigen 3 in your urine. When PSA levels are abnormal, the urologist will usually suggest that you return in 6 months for a second PSA test to confirm the presence of the cancer. Other test options that may be used to confirm a diagnosis of prostate cancer are:

(a) Digital rectal exam: The doctor will insert a gloved finger into your lower rectum and prostate gland to check for any abnormalities in size, texture or shape of the prostate.

(b) Targeted biopsy: The doctor removes tissue samples from the prostate by using either MRI fusion-targeted 3D imaging method or the ultrasound high-yield saturation method. Samples taken are analyzed to detect the cancer and determine its severity.

(c) Prostate imaging: Also called perfusion dynamic MRI, prostate imaging uses a special contrast agent inserted into the prostate to precisely identify patients with the risk of prostate carcinoma.
Once prostate cancer is confirmed, the next step is determining its aggressiveness. The aggressiveness of a cancer helps the urologist to choose the best treatment option for the condition. So, after knowing how aggressive the cancer is, the urologist can recommend:

(a) Active surveillance: You are not offered any treatment but kept under careful observation and medical monitoring.

(b) External beam therapy (EBT): The urologist refers you to a radiation oncologist to deliver a beam of high-energy proton beams or x-ray to the tumor location. The oncologist may also use other radiation techniques such as conformal external beam radiation therapy, stereotactic body radiation therapy, proton beam therapy, or image-guided radiation therapy.

(c) Brachytherapy: In this case, radiation is delivered to your prostate by placing radioactive materials inside the prostate. The two forms used are low-dose rate (LDR) and the high-dose rate (HDR) Brachytherapy.

(d) Cryotherapy: This method uses extremely low temperatures (as low as -190 degrees Celsius) to freeze and destroy cancer cells.

(e) Surgery: The urologist makes an incision through the perineum or in the lower abdomen to remove the prostate. A skilled and experienced urologist will perform the surgery without interfering with your sexual function.
At Advanced Urology Institute, we have the best pool of urologists and state-of-the art equipment to help detect and treat prostate cancer. If you want to be screened for the condition, even without symptoms, never hesitate to see a urologist. Remember, early detection is the key to successful prostate cancer treatment. To learn more about prostate cancer screening, prevention and treatment, visit Advanced Urology Institute.