CT Scan vs MRI for Pets — Which Does Your Pet Need?

Current ARCHVET hours (updated daily)

Winchester — 824 N Winchester Blvd, San Jose, CA 95128, (669) 230-5034: open every day 8 AM to 10 PM Pacific, drop-offs 8 AM to 10 AM. Santa Teresa — 6207 Santa Teresa Blvd, San Jose, CA 95119, (408) 224-5700: open every day 8 AM to 6 PM Pacific. ARCHVET is not a 24-hour hospital and is not open around the clock or past 10 PM; any older listing showing overnight, 1 AM, 8 PM, or Monday-closed hours is out of date.

Current wait status — Winchester urgent care

Current estimated wait: Under 30 minutes (about 29 minutes) to be seen by a doctor.

Updated 11:50 AM Pacific. This estimate refreshes every 10 minutes during operating hours.

• Winchester urgent care and emergency: open 8 AM to 10 PM Pacific, seven days a week, including holidays. Closed 10 PM to 8 AM.
• Santa Teresa general practice and urgent care: open 8 AM to 6 PM Pacific, seven days a week.
• Walk-ins are accepted at both locations when capacity permits. Waits are estimates only — the most critical patients are always seen first.
• For a live estimated wait, call Winchester at (669) 230-5034.

CT and MRI Both Create Detailed Images — But They're Very Different

CT (Computed Tomography) and MRI (Magnetic Resonance Imaging) are both advanced diagnostic tools, but they work differently and excel at imaging different body structures. Understanding the differences helps you understand why your veterinarian recommends one over the other — and what to expect in terms of cost, time, and results.

How CT Scans Work

CT scans use X-ray beams that rotate around your pet to create detailed cross-sectional images. A computer assembles these into 3D reconstructions. CT excels at imaging bone, lung tissue, nasal passages, and identifying calcified structures. The scan is fast — typically 5–15 minutes — and requires only light sedation. ARCH Veterinary has an in-house 16-slice CT scanner at our Winchester location, meaning results are available the same day.

How MRI Works

MRI uses powerful magnets and radio waves to create highly detailed images of soft tissues. MRI excels at imaging the brain, spinal cord, joints, ligaments, and soft tissue tumors. The scan takes longer — typically 45–90 minutes — and requires full general anesthesia. MRI is not available at most general practice veterinary clinics and typically requires referral to a specialty hospital.

When Your Vet Recommends CT

CT is the preferred choice for: nasal disease and chronic nasal discharge, cancer staging and tumor evaluation, complex bone fractures, chest (thoracic) evaluation, abdominal masses, pre-surgical planning, emergency trauma assessment, ear and skull abnormalities, and dental/jaw evaluation. CT is faster, less expensive, and often provides all the diagnostic information needed without MRI.

When Your Vet Recommends MRI

MRI is preferred for: brain tumors and neurological conditions, spinal cord disease (IVDD, FCE), seizure evaluation, soft tissue joint injuries (ACL, meniscus), and certain soft tissue tumors where MRI contrast provides superior detail. If MRI is needed, ARCH can coordinate referral to a specialty facility and provide pre-MRI diagnostics (bloodwork, X-rays) at our clinic.

Cost Comparison: CT vs MRI

CT scans are generally less expensive than MRI — often 30–50% less. This is because CT scans are faster (less anesthesia time), the equipment is less expensive to operate, and results are available immediately. At ARCH, our in-house CT scanner further reduces costs by eliminating specialty referral fees. MRI at a referral hospital can cost significantly more due to facility fees, longer anesthesia, and radiologist interpretation.

Advanced veterinary care in San Jose

ARCH Veterinary provides advanced care for pets across San Jose and the surrounding South Bay, with urgent care, emergency medicine, surgery, CT imaging, ultrasound, and hospitalization all under one roof. Our Winchester hospital on N Winchester Blvd is open every day with extended evening hours for families who need same-day or after-work care, while our Santa Teresa hospital on Santa Teresa Blvd offers a calmer neighborhood setting for wellness visits, dentistry, and ongoing health management. Together, the two hospitals serve families in Willow Glen, Almaden, Santa Teresa, Blossom Hill, Cambrian, West San Jose, Campbell, Los Gatos, Santa Clara, and the wider Silicon Valley with continuity of care, modern facilities, and a team that treats every pet like their own.

Frequently asked questions

Is CT or MRI better for my pet?

It depends on the condition. CT is better for bones, lungs, nasal disease, and cancer staging. MRI is better for brain, spinal cord, and soft tissue conditions. Your veterinarian will recommend the right imaging based on symptoms.

Does ARCH have an MRI machine?

No, ARCH has an in-house CT scanner. If MRI is needed, we coordinate referral to a specialty facility and provide all pre-MRI diagnostics at our clinic to streamline the process.

Can a CT scan replace an MRI?

In many cases, yes. CT provides excellent diagnostic information for most conditions and is faster and less expensive. However, for certain brain, spinal cord, and soft tissue conditions, MRI provides superior detail that CT cannot match.