About
As a skilled Radiologist, Dr. David Lloyd Webster interprets medical images and performs image-guided procedures, playing a key role in patient diagnosis and care. Practicing at medical facilities in Sudbury, ON, he supports various clinical departments. His practice adheres strictly to the standards and ethical guidelines set by the College of Physicians and Surgeons of Ontario (CPSO). Areas of subspecialty focus or particular interest may include Nuclear Medicine, providing specialized insights for complex cases. Dr. Webster prioritizes patient safety in every aspect of his work, ensuring that diagnostic processes are accurate, efficient, and minimally invasive for patients requiring diagnostic imaging or image-guided procedures.
He graduated with a Medical Degree from Schulich School of Medicine and Dentistry in 1977 in Canada. With over 35 years of experience as a practicing Radiologist since 1989, Dr. Webster has developed a comprehensive expertise in diagnostic imaging. He is certified as a RCPSC Specialist, maintaining high standards of professional competence and ongoing education to stay current with advancements in radiology technology and practice.
Dr. Webster’s clinical philosophy emphasizes a patient-safety focused approach, with a dedication to diagnostic accuracy in the Sudbury community. He is fluent in English and committed to clear communication, ensuring patients and referring physicians are well-informed about imaging procedures and results, fostering trust and optimal care outcomes.

- Fluoroscopy Procedure Interpretation: Interpreting real-time X-ray imaging (fluoroscopy) used during procedures like barium studies (GI tract), hysterosalpingograms, or to guide certain injections.
- Ultrasound Interpretation (Sonography): Evaluation and reporting of diagnostic ultrasound images for assessing organs (e.g., liver, kidneys, thyroid, reproductive organs), blood flow, pregnancies, and musculoskeletal conditions.
- Magnetic Resonance Imaging (MRI) Interpretation: Specialized analysis and reporting of MRI scans, providing detailed images of soft tissues, brain, spine, joints, abdomen, and pelvis without using ionizing radiation.
- Mammography and Breast Imaging Interpretation: Expert review and reporting of mammograms (including tomosynthesis/3D mammography) and breast ultrasound for cancer screening, diagnosis, and follow-up.
- Bone Densitometry (DEXA) Scan Interpretation: Analyzing DEXA scans to measure bone mineral density, assess osteoporosis risk, and monitor treatment effectiveness.
Note: This list provides an overview of common radiology services. Dr. Webster interprets a wide range of medical imaging studies and/or performs procedures as indicated by your referring physician. Specific subspecialty services depend on the physician's focus and training.
All medical imaging services are provided in accordance with the standards of practice set by the College of Physicians and Surgeons of Ontario (CPSO).
Dr. Webster primarily practices at medical imaging facilities located in the Downtown Sudbury area, including the Minnow Lake and Ramsey Lake neighborhoods. These facilities are conveniently situated near the Sudbury Community Arena and Mackey Building (City Hall Annex). Patients can access the location easily via GOVA Transit (Greater Sudbury Transit). The facility is wheelchair accessible. Parking is available at the facility.
- Are imaging studies interpreted by Dr. Webster covered by Ontario Health Insurance Plan (OHIP) in ON?
- Medically necessary diagnostic imaging studies interpreted by a Radiologist like Dr. Webster are typically covered by Ontario Health Insurance Plan (OHIP) in ON when prescribed by your referring physician and performed at an accredited medical facility. Some advanced or specialized interventional procedures may also be covered. It's always best to confirm specific coverage details with Ontario Health Insurance Plan (OHIP) or the imaging clinic/hospital.
- Do I need a referral from my doctor to have an imaging study interpreted by Dr. Webster?
- Yes, almost all diagnostic imaging tests (like X-rays, CT, MRI, ultrasounds) and interventional radiology procedures require a formal request or requisition from your family doctor, specialist, or other authorized healthcare provider. Dr. Webster provides expert interpretation of these physician-ordered studies.
- Is there general preparation needed before an imaging appointment?
- Preparation varies significantly based on the type of imaging test. Some require fasting for several hours, others may need you to drink water for a full bladder, or avoid certain medications. You will receive specific instructions from the clinic or hospital when your appointment is scheduled. It's very important to follow these instructions carefully to ensure the quality of your exam and your safety.
- What does a Radiologist actually do? Do they take the pictures?
- A Radiologist (like Dr. Webster) is a medical doctor who has completed extensive specialty training in interpreting all types of medical images (X-rays, CT, MRI, ultrasound, nuclear medicine, etc.) to diagnose diseases and injuries. They provide a written report of their findings to your doctor. While skilled technologists operate the imaging equipment to take the pictures, the Radiologist is the expert physician who analyzes these images to provide a diagnosis. Some Radiologists (Interventional Radiologists) also perform image-guided minimally invasive procedures.
- I'm concerned about radiation exposure. Are X-rays and CT scans safe?
- Patient safety is our top priority. Radiologists and technologists are trained to use the lowest radiation dose necessary to obtain high-quality diagnostic images (this is known as the ALARA principle - As Low As Reasonably Achievable). While X-rays and CT scans do use ionizing radiation, the amount for most diagnostic exams is carefully controlled and the benefit of an accurate diagnosis generally far outweighs the very small potential risk. If you have specific concerns, please discuss them with your referring doctor or the imaging staff before your exam.
- How will I get the results of my imaging exam?
- After your imaging exam is completed, Dr. Webster (or a colleague Radiologist) will carefully review the images and prepare a detailed report. This report is sent directly to the physician who ordered your test (your referring doctor). Your referring doctor will then discuss the results with you, typically at a follow-up appointment, and explain what they mean in the context of your overall health. Please allow a few business days for the report to reach your doctor.
Suite 301, 41 Ramsey Lake Road
Sudbury, ON P3E 5J1
Phone: (705) 675-4714 | Fax: (705) 671-7384
The facility is wheelchair accessible.
Dr. Webster is a licensed physician regulated by the College of Physicians and Surgeons of Ontario (CPSO) under the Medicine Act, 1991 in ON. Imaging services are typically provided based on referrals from other physicians.
Verify registration with the College of Physicians and Surgeons of Ontario (CPSO): https://doctors.cpso.on.ca/DoctorDetails/Webster-David-Lloyd/0025153-29976