CTU, in medical terms, stands for Computed Tomography Urography.
Understanding Computed Tomography Urography (CTU)
CTU is a specialized imaging technique that utilizes computed tomography (CT) scans to visualize the urinary tract. It is an important diagnostic tool used to evaluate various conditions affecting the kidneys, ureters, bladder, and surrounding structures.
How CTU Works:
- A CT scanner uses X-rays to create detailed cross-sectional images of the body.
- During a CTU, intravenous contrast dye is often administered to improve the visibility of the urinary tract structures, highlighting abnormalities. This is often referred to as contrast-enhanced imaging.
- The scan captures images of the urinary system in different phases, including both before and after the contrast agent is excreted. This process is sometimes called excretory imaging.
- These images are then analyzed by radiologists to diagnose conditions.
Key Aspects of CTU:
| Feature | Description |
|---|---|
| Imaging Modality | Uses X-rays and computed tomography. |
| Contrast | Often uses intravenous contrast dye to enhance visualization of urinary tract. |
| Focus | Evaluates the upper and lower urinary tract including kidneys, ureters, bladder and surrounding area. |
| Excretory Imaging | Includes images during contrast excretion for comprehensive evaluation of the urinary tract function. |
Why CTU is Performed:
CTU is performed for various reasons, such as:
- Evaluating Hematuria (Blood in Urine): Finding the source of blood in the urine.
- Detecting Urinary Tract Stones: Identifying kidney stones or ureteral stones.
- Diagnosing Urinary Tract Infections (UTIs): Investigating complications from UTIs.
- Assessing Urinary Tract Tumors: Detecting or evaluating masses or cancers in the urinary system. The reference mentions that CTU can be used to assess both upper tract and abdominopelvic recurrences.
- Evaluating Congenital Abnormalities: Identifying structural problems present from birth.
- Evaluating Recurrences: CTU can identify recurrences within the abdominopelvic area, including the upper urinary tract.
Practical Insights:
- CTU is a powerful tool, providing comprehensive views of the entire urinary tract.
- It is particularly beneficial for detecting subtle abnormalities that may not be visible on other imaging modalities.
- The use of contrast agents can have risks, and should be evaluated before the test, particularly in patients with pre-existing kidney conditions.
