Medical imaging is one of the most powerful tools in healthcare today, allowing doctors to detect, diagnose, and monitor conditions with accuracy and precision. At GLMI, we provide a wide range of imaging services for patients across Buffalo, Williamsville, Cheektowaga, Orchard Park, and Cambria. Preparing properly for your scan helps ensure the clearest images and the most accurate results.

This guide explains how to prepare for the most common imaging tests we provide at GLMI, including ultrasound, low-dose CT, PET/CT, nuclear medicine, bone densitometry, and X-ray/fluoroscopy.

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Preparing for Ultrasound

Ultrasound exams use sound waves to capture real-time images of your body’s organs and blood vessels. Preparation depends on the type of ultrasound you need:

• Abdominal ultrasound – You may need to avoid eating or drinking for 8–12 hours before the test.
• Pelvic ultrasound – A full bladder is often required, so you may be asked to drink several glasses of water before your appointment.
• Vascular ultrasound – Minimal preparation is required, though your doctor may recommend avoiding caffeine beforehand.

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Preparing for a Low-Dose CT Scan

Low-dose CT scans use advanced X-ray technology to provide detailed images of internal structures. To prepare:

• You may be asked to fast for a few hours if contrast material is required.
• Wear comfortable clothing and avoid jewelry or metal around the area being scanned.
• Drink extra water afterward to help flush contrast dye from your system if it’s used.

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Preparing for a PET/CT Scan

PET/CT scans evaluate both anatomy and function, providing powerful insights into organ health and metabolism. Preparation steps include:

• Avoid strenuous exercise for at least 24 hours before your scan.
• You may need to avoid eating for several hours prior to the test.
• Diabetic patients should follow special instructions from their provider to manage blood sugar levels.

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Preparing for Nuclear Medicine Tests

Nuclear medicine scans use small amounts of radioactive material to examine organ function and structure. Preparation varies depending on the test:

• Some tests require fasting or avoiding caffeine beforehand.
• You may need to temporarily adjust certain medications as directed by your physician.
• Drink plenty of fluids after your scan to help eliminate the tracer from your body.

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Preparing for Bone Densitometry

Bone densitometry, or bone density testing, measures bone strength and helps detect osteoporosis. Preparation is simple:

• Avoid calcium supplements for 24 hours before the test.
• Wear loose clothing without zippers, snaps, or metal fasteners.
• Inform your technologist if you have recently had a CT scan with contrast or a barium study.

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Preparing for X-ray and Fluoroscopy

X-ray and fluoroscopy exams are quick and widely used. Preparation depends on the type of exam:

• Some studies may require fasting or the use of contrast material.
• Wear clothing without metal fasteners, and you may be asked to remove jewelry.
• Follow all instructions provided by your physician or technologist to ensure clear results.

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General Tips for Any Imaging Appointment

In addition to the scan-specific instructions above, here are general preparation tips for any imaging test at GLMI:

• Arrive early to allow time for check-in and paperwork.
• Bring a list of your current medications and allergies.
• Let your technologist know if you are pregnant, may be pregnant, or are breastfeeding.
• Don’t hesitate to ask questions — our team is here to make you comfortable and informed.

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Why Preparation Matters

Proper preparation ensures that your scan produces the clearest images possible, which helps our radiologists provide the most accurate diagnosis. Following instructions can:

• Reduce the likelihood of repeat scans.
• Shorten exam times and minimize discomfort.
• Improve your doctor’s ability to create an effective treatment plan.

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Schedule Your Imaging Appointment

Whether you need an ultrasound, CT scan, PET/CT scan, nuclear medicine test, bone density scan, or X-ray/fluoroscopy exam, GLMI provides comprehensive imaging services to patients across Western New York.

Contact GLMI today to schedule your imaging appointment at our convenient locations in Williamsville, Cheektowaga, Orchard Park, or Cambria.

Medical Disclaimer: This article is for informational purposes only and is not a substitute for professional medical advice. Always consult your physician or qualified healthcare provider about your specific symptoms and treatment options.