CT Urogram — Dictation, Appropriateness, and Dose for Residents

1. The 65-Year-Old Smoker with Hematuria: Nailing the CT Urogram

The ED calls with a new consult: a 65-year-old smoker with painless gross hematuria. The CT urogram is on your list, the urologist is waiting for the read, and your attending expects a definitive answer on the big three: stones, renal mass, and urothelial cancer. This isn’t just a belly scan; it’s a purpose-built study where every phase has a specific job. Miss a small filling defect on the excretory phase, and you could miss a TCC.

When I was a resident, the pressure on these reads was real. You have to systematically check each phase for its primary target. Getting the key findings into a clean, structured impression is what separates a good read from a great one. This guide will walk you through a rock-solid approach to dictating the CT urogram, from protocol to impression. This is the kind of practical, high-yield content we’re building out in the residents and fellows resource hub.

2. What a CT Urogram (Triple-Phase Hematuria Workup) Covers and What Attendings Look For

The CT urogram is the definitive imaging workup for adult hematuria. It’s designed to answer several key clinical questions in a single, multi-phase study. Your attending expects a report that systematically addresses each one.

This study is primarily used for:

• Workup of gross or microscopic hematuria, especially in high-risk patients (age >35, smoker, occupational exposure).
• Evaluation for suspected upper tract transitional cell carcinoma (TCC).
• Assessing for renal calculi, especially when complicated by infection or hydronephrosis.
• Pre-operative anatomic mapping before procedures like partial nephrectomy.

A comprehensive CT urogram report should clearly answer:

• Renal Calculi: Are there stones? If so, note their number, location, size, and density (Hounsfield units). The non-contrast phase is king here.
• Renal Masses: Is there a solid or cystic renal mass? The nephrographic phase provides peak parenchymal enhancement to detect and characterize these lesions.
• Urothelial Cancer: Are there any filling defects, wall thickening, or strictures in the renal pelves, ureters, or bladder? The excretory phase, with its opacified collecting system, is critical for spotting these abnormalities.
• Other Findings: The report should also address congenital anomalies, the cause of any hydronephrosis, and other incidental findings in the abdomen and pelvis.

Remember, while CT urogram is excellent for the upper tracts and bladder wall, cystoscopy remains the gold standard for evaluating the bladder mucosa and is often performed regardless of CT findings.

3. Radiology Report Template for CT Urogram (Triple-Phase Hematuria Workup)

Use this template as a starting point for your macros. It’s structured to ensure you cover all the key elements your attending and the referring urologist need to see.

Technique

Multi-phase CT of the abdomen and pelvis was performed without and with intravenous contrast. Non-contrast images were obtained through the kidneys, ureters, and bladder. Following administration of [100] mL of [Omnipaque 350], nephrographic phase imaging was performed at approximately 100 seconds. Delayed excretory phase imaging was performed at [10] minutes. [10 mg of intravenous furosemide was administered with the contrast.] Coronal and sagittal reformatted images were reviewed.

Findings

Kidneys: Normal in size, position, and configuration. No focal renal mass. No hydronephrosis or perinephric stranding. Renal parenchymal enhancement is symmetric. No renal calculi on the non-contrast series.

Ureters: The ureters are normal in course and caliber. The collecting systems are well-opacified on the excretory phase. No filling defects, strictures, or extrinsic compression identified.

Bladder: The urinary bladder is well-distended and opacified. The bladder wall is normal in thickness without focal mass or filling defect. [Note: CT is limited for the evaluation of flat mucosal lesions. Clinical correlation with cystoscopy is recommended.]

Adrenal Glands: Unremarkable.

Other Viscera: The liver, spleen, pancreas, and gallbladder are unremarkable.

Bowel and Mesentery: No bowel wall thickening, obstruction, or mesenteric adenopathy.

Vasculature: The aorta and major visceral vessels are patent.

Bones and Soft Tissues: No suspicious osseous lesion. Visualized soft tissues are unremarkable.

Impression

1. No evidence of renal or ureteral calculi.

2. No suspicious renal mass.

3. No filling defect, stricture, or mass to suggest a urothelial malignancy in the visualized upper tracts or bladder.

4. No hydronephrosis.

4. Where to Find More Free Radiology Report Templates

Building a personal library of high-quality templates is one of the best things you can do as a trainee. While this guide provides a solid foundation, two great free repositories exist online that are worth bookmarking. They are curated by radiologists and cover a huge range of studies across all subspecialties.

• RadReport.org: Maintained by the Radiological Society of North America (RSNA), this is a comprehensive library of peer-reviewed templates that often align with ACR practice parameters.
• Radiology Templates (AU): This is an excellent, user-friendly site maintained by Australian radiologists with a wide variety of practical, clean templates.

5. Streamlining Your Dictation with AI-Powered Structured Reporting

A good template is your starting point, but the real challenge is efficiently documenting positive findings. When you find a 4 cm enhancing renal mass, a ureteral filling defect, and a non-obstructing stone, your report structure has to adapt on the fly. You have to pull in the right classification systems (like Bosniak for cysts) and ensure your impression is clean and actionable.

This is where modern tools can make a huge difference. Instead of manually editing your template for every positive finding, you can dictate them in free form. GigHz Precision AI is designed to help by taking your free-form dictation of positive findings and automatically generating a complete, structured report. It uses pre-loaded templates from the American College of Radiology (ACR) and Society of Interventional Radiology (SIR) to ensure the output is standardized and high-quality. The system is also designed to surface relevant Clinical Decision Support (CDS) popups for classifications like LI-RADS or Bosniak, helping you get the report right the first time.

6. When Should You Order a CT Urogram? ACR Appropriateness Criteria

Deciding on the right imaging study is as important as reading it correctly. The American College of Radiology (ACR) provides evidence-based guidelines to help with this. For the workup of hematuria, the guidance is quite clear.

According to the ACR Appropriateness Criteria® for Hematuria, a CT Urogram is “Usually Appropriate” for the initial evaluation of hematuria in adults, particularly those over the age of 35 or with risk factors for malignancy like a history of smoking. The multi-phase nature of the study allows for comprehensive evaluation of the kidneys, collecting systems, and bladder in one go.

While CT Urogram is the workhorse, there are important alternatives to consider:

• MR Urography: This is an excellent radiation-free alternative, particularly valuable in younger patients, pregnant patients, or those with contraindications to iodinated contrast.
• Cystoscopy: This is not so much an alternative as it is a required complement to imaging. It is the gold standard for evaluating the bladder mucosa for flat lesions or carcinoma in situ that can be missed on CT.
• Retrograde Pyelography: This invasive fluoroscopic procedure is typically reserved for problem-solving when a ureteral lesion is suspected on CTU but not fully characterized.

7. How Much Radiation Does a CT Urogram Deliver?

Patients and referring clinicians are increasingly aware of radiation dose, and you should be prepared to answer their questions. A CT urogram is considered a higher-dose study due to its multiple phases.

The estimated effective dose from a CT urogram can vary based on the protocol used. A traditional triple-phase study delivers a higher dose than a modern split-bolus protocol, which combines the nephrographic and excretory phases into a single scan.

To put this in perspective, this dose is equivalent to several years of natural background radiation. The split-bolus technique is a significant advance, reducing the total radiation dose by approximately 30% without a major compromise in diagnostic information for most cases. Always use the lowest radiation dose possible (ALARA principle), especially in younger patients or those who may require repeat imaging.

8. CT Urogram Imaging Protocol — Phases, Contrast, and Reconstructions

A high-quality CT urogram depends on a meticulously executed protocol. Understanding the “why” behind each phase is key to troubleshooting a suboptimal study and interpreting the images correctly. The goal is to sequentially highlight stones, the renal parenchyma, and the urothelium. The use of intravenous furosemide is also a critical component, as it promotes diuresis to distend the ureters and collecting system, making it much easier to spot small filling defects.

Here is a typical protocol breakdown:

Common protocol pitfalls:
The main trade-off is between a true triple-phase protocol and a split-bolus protocol. The split-bolus technique (e.g., giving 30 mL of contrast, waiting 8 minutes, then giving the remaining 70 mL and scanning once) is excellent for reducing radiation dose. However, a true triple-phase study provides distinct, unmixed nephrographic and excretory information, which can sometimes be valuable for characterizing complex lesions. Poor ureteral opacification on the excretory phase is another common issue, often due to inadequate hydration or insufficient delay time; this is why furosemide is so important.

9. The 3-Months-Free Offer for Radiology Residents and Fellows

3+ months free for radiology residents and fellows

Look like a rockstar on your reports. We’re offering trainees extended free access to GigHz Precision AI. You can dictate your positive findings in free form, and the AI will generate a clean, structured report using ACR and SIR templates. The appropriate clinical decision support for things like complex cysts or liver lesions fires automatically, guiding you to the right classification.

All we ask in return is your feedback so we can keep improving the product for trainees on the front lines.

Signup is simple. There’s no credit card required and no long forms. To get started, just provide three items:

1. Your PGY year (e.g., PGY-2, PGY-4)
2. Your training type (radiology residency or fellowship specialty)
3. Your training program / hospital name

Ready to give it a try? Apply for the residents free-access program and we’ll get you set up.

10. Frequently Asked Questions (FAQ)

Is GigHz Precision AI HIPAA-compliant?

Yes. The platform is designed for de-identified workflows by default. It does not require or store Protected Health Information (PHI) to function. All processing is done in a secure, HIPAA-compliant environment.

Do I need my hospital’s IT department to set this up?

No. GigHz Precision AI is browser-based and requires no local software installation or special permissions. It works on any modern computer, including the workstations in your reading room or a personal laptop or iPad at home.

How does this work with PowerScribe or other dictation systems?

It works alongside your current dictation system. You can dictate your findings as you normally would, then use the AI-generated structured report to finalize your documentation. Many residents find it useful to have open on a second monitor or an iPad to quickly generate structured impressions and findings.

Can I customize the templates?

Yes. While the system comes pre-loaded with standard ACR and SIR templates, you can create, modify, and save your own personal templates to match your preferences or your institution’s specific formatting requirements.

What happens after my residency or fellowship ends?

We offer continuity pricing for graduating trainees who want to continue using the platform in their practice. Your templates and account settings carry over seamlessly.