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Renal Ultrasound in Fairbanks, AK

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Renal Ultrasound in Fairbanks, Alaska

A renal ultrasound — also called a kidney ultrasound — is a non-invasive imaging exam that uses high-frequency sound waves to evaluate the size, shape, and internal structure of the kidneys. It’s one of the most common ways providers check for kidney stones, cysts, blockages, and other abnormalities, and it does all of this without radiation, needles, or sedation. At Fairbanks Ultrasound, we perform renal ultrasounds locally in Fairbanks, AK, with same-day walk-in availability for patients who arrive with a valid referral or imaging order.

Because Fairbanks sits hundreds of miles from the nearest major metropolitan medical center, many patients in the Interior have historically had to wait longer than they should for basic diagnostic imaging, or travel out of the area entirely. Our goal is to make sure that a renal ultrasound — often one of the first steps in figuring out the source of kidney pain, blood in the urine, or abnormal lab results — is available quickly, locally, and without unnecessary delay.

How Does a Renal Ultrasound Work?

During a renal ultrasound, a sonographer applies a small amount of water-based gel to the skin over the kidneys and moves a handheld device called a transducer across the area. The transducer sends out sound waves that bounce off internal structures and return as echoes, which a computer translates into real-time images of the kidneys. Because the images are generated instantly, your sonographer can view the kidneys from multiple angles during the same visit, and a radiologist reviews the full set of images to prepare your report.

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What Does a Renal Ultrasound Detect?

A renal ultrasound gives your provider a clear look at several different aspects of kidney health in a single exam. Common findings include:

Kidney Stones

Kidney stones, or renal calculi, are hard mineral deposits that form inside the kidney and can cause significant pain as they move through the urinary tract. Ultrasound is one of the most widely used non-radiation methods for detecting stones, particularly larger stones located in the kidney itself. For a deeper look at stone detection specifically, see our related guides below.

Kidney Cysts

Cysts are fluid-filled sacs that are usually benign and often found incidentally during an unrelated exam. Ultrasound can distinguish a simple cyst — which typically requires no treatment — from a more complex one that may need further evaluation.

Hydronephrosis (Swelling from Blockage)

When something blocks the normal flow of urine — a stone, a structural narrowing, or another obstruction — urine can back up and cause the kidney to swell. This condition, known as hydronephrosis, is often clearly visible on ultrasound and can help your provider identify the location and likely cause of a blockage.

Abnormal Kidney Size, Shape, or Scarring

Chronic kidney disease, prior infections, and congenital differences can all affect the size and shape of the kidneys over time. A renal ultrasound provides measurable, trackable data that your provider can compare against future exams to monitor changes.

Blood Flow and Renal Artery Health

Using a specialized mode called Doppler ultrasound, your sonographer can also evaluate blood flow through the renal arteries, which supply the kidneys with oxygen-rich blood. This can help identify narrowing or reduced blood flow that may contribute to high blood pressure or declining kidney function.

If you’re specifically concerned about kidney stones, our team has put together detailed guides on stone detection and diagnosis:

Why Would a Doctor Order a Renal Ultrasound?

Providers order renal ultrasounds for a wide range of reasons. The most common include:

  • Flank pain or back pain that may be related to the kidneys
  • Blood in the urine (hematuria), visible or detected on a urine test
  • Recurring urinary tract infections
  • Abnormal kidney function reflected in blood work (elevated creatinine or BUN)
  • A family history of kidney disease or polycystic kidney disease
  • Monitoring a previously identified kidney condition over time
  • Follow-up on an incidental finding from another imaging exam
how long does an abdominal ultrasound take and what to expect

In many cases, a renal ultrasound is the first imaging step your provider will order before considering more advanced testing, since it’s fast, affordable, and avoids radiation entirely.

Renal Ultrasound vs. CT and MRI

While CT scans and MRI can also evaluate the kidneys, ultrasound is typically used first because it’s faster, less expensive, and doesn’t expose you to radiation or require contrast dye. CT is often reserved for cases where a stone needs to be located with more precision, or when ultrasound findings need further clarification. Your provider will determine which imaging approach is right for your specific situation.

How to Prepare for Your Renal Ultrasound

Preparation depends on which structures are being evaluated during your visit. In many cases, you’ll be asked to arrive with a full bladder, since this can improve visualization of the lower urinary tract. In other cases, a period of fasting beforehand may be recommended to reduce bowel gas that can interfere with image quality. Our team will let you know exactly what to do ahead of your specific appointment, and our prep guides below walk you through the details:

What to Expect During Your Exam

Your renal ultrasound takes place at our Fairbanks, Alaska imaging center. After checking in, you’ll be brought back to a private exam room and asked to lie down on the exam table. Your sonographer will apply a small amount of warmed gel to the skin over your kidneys and use the transducer to capture images from several angles, sometimes asking you to hold your breath briefly or shift position to get a clearer view. The exam itself is completely painless and typically takes between 20 and 30 minutes from start to finish. Same-day walk-in appointments are available for patients who arrive with a valid referral or imaging order.

Understanding Your Results

After your exam, a board-certified radiologist reviews your images and prepares a detailed report, which is sent to your referring provider. In many cases, your provider will discuss the results with you at a follow-up visit. If something unexpected is found — such as a stone, cyst, or area that needs a closer look — your provider may recommend additional imaging or a specialist referral to determine next steps.

Why Choose Fairbanks Ultrasound

Fairbanks Ultrasound is a locally owned and operated imaging center serving Fairbanks and the surrounding Interior Alaska community. Our sonographers and radiologists are experienced in a wide range of diagnostic exams, and our same-day walk-in availability means you don’t have to wait weeks for an appointment that a hospital-based imaging center might otherwise require. We’re proud to be part of the Fairbanks community, and we’re committed to making high-quality diagnostic imaging accessible close to home.

Frequently Asked Questions

Yes — “renal ultrasound” and “kidney ultrasound” refer to the same exam.

Most patients schedule with a referral or imaging order from their provider. Same-day walk-ins are welcome when a valid order is presented.

Yes, ultrasound is one of the most common non-radiation methods used to detect kidney stones, though very small stones can sometimes be missed. See our full guide linked above for more detail.

Most renal ultrasound exams take between 20 and 30 minutes.

It depends on what your provider wants evaluated. Our team will give you specific instructions ahead of your appointment — see our prep guides above for general guidance.

Your referring provider will review your results with you and determine whether any follow-up imaging, testing, or specialist referral is needed.

Schedule your renal ultrasound in Fairbanks, Alaska today. Call (907) 374-4644 or book online.

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