Radiology Specialist

William R. Martin, MD -  - Diagnostic Imaging

Upper Valley Interventional Radiology

William R. Martin, MD

Diagnostic Imaging & Diagnostic Radiologist located in McAllen, TX

Radiology is essential for diagnosing the health condition that’s responsible for your symptoms. Experienced radiologist William R. Martin, MD, and the radiology staff at Upper Valley Interventional Radiology in McAllen, Texas, perform high-quality diagnostic imaging tests using today’s most advanced equipment in the comfort of their office. Whether you need X-rays, CT scan, MRI, ultrasound, bone density testing or cardiac testing, call the office or schedule an appointment online.

Radiology Q & A

What is radiology?

Radiology uses imaging technology to visualize the hard and soft tissues inside your body. Radiologists use different types of imaging to diagnose diseases and injuries, screen for illnesses, and assess how well your body responds to treatments. 

Another specialty area called interventional radiology uses real-time imaging technology to guide procedures, such as inserting stents or injecting medications into a joint.

What types of imaging do radiologists use?

Radiologists are extensively trained to interpret:


X-rays use a low dose of radiation to produce images.

CT scans

CT scans also use X-rays, but the X-rays are shot in a series of cross sections as the scanning device rotates around your body. About 1,000 images are recorded with each rotation, and then a specialized computer reconstructs them into 2- or 3-dimensional images.


MRI uses a magnetic field, radiofrequency pulses, and a computer to create detailed images of your organs, bones, soft tissues, and virtually every structure in your body.


Ultrasound uses high-frequency sound waves that safely enter your body and bounce off structures, then the echoes are translated into images. Ultrasound can capture movement, such as the heart beating or blood moving through arteries.


Fluoroscopy shows a continuous X-ray on a monitor, creating real-time imaging that’s used during endovascular, surgical, and interventional procedures.


Mammography is a low-dose X-ray to identify breast diseases such as cancer.

Cardiac imaging

Heart diseases are diagnosed with echocardiography, chest X-rays, MRI, CT scans, and nuclear medicine.

Nuclear medicine

Nuclear medicine is a specialized area of radiology that uses a small amount of radioactive material that builds up in the area being checked. The testing device detects the radioactive energy and creates images that help assess organ function and structure.

Bone mineral densitometry

This imaging test diagnoses osteoporosis using X-rays to measure the mineral content of your bones.

Positron emission tomography (PET) scan

A PET scan produces images by detecting tiny particles emitted from a radioactive substance that you receive prior to the scan. PET scans may detect disease before it appears on other types of imaging.

How do radiologists promote my health?

All doctors depend on imaging to accurately diagnose injuries and diseases, and to determine the best treatment. However, a radiologist like Dr. Martin can also protect your health by providing expert pain management and offering innovative options such as BalanceBack™, which diagnoses balance problems. 

If you have questions about radiology, call Upper Valley Interventional Radiology or schedule an appointment online.

Our Services








Pain Management




Vascular Disease