Image Wisely is a joint initiative of the American College of Radiology, Radiological Society of North America, American Society of Radiological Technologists and American Association of Physicists in Medicine.

Case 5: Imaging Wisely When Evaluating for Pulmonary Embolism

Explains doses to patients and their impacted organs from CT and V/Q scans in the evaluation of pulmonary embolism.

Authors: E. Grady; F.H. Fahey

Target Audience: Radiologists, radiologic technologists, nuclear medicine technologists and medical physicists working in diagnostic radiology or nuclear medicine

This educational activity is free.

Learning Objectives
Upon completion of this case, the participant will be able to:

  1. Demonstrate contributions of medical radiation to overall radiation exposure of patients and potential consequences that have been published in the medical literature
  2. Demonstrate differences in radiosensitivity of different tissues, and differences in radiosensitivity over different age groups
  3. Describe effective dose to patients from computed tomography (CT) and ventilation/perfusion (V/Q) scans in evaluation of pulmonary embolism as well as specific doses to certain tissues and the fetus
  4. Describe recent literature and selected national guidelines for evaluating pulmonary embolism in the setting of a normal chest radiograph

Access the case »

CE Credit Information

The American College of Radiology is accredited by the Accreditation Council for Continuing Medical Education (ACCME) to provide continuing medical education for physicians.

The American College of Radiology designates this online activity for a maximum of 0.5 AMA PRA Category 1 Credit(s)™. Physicians should claim only the credit commensurate with the extent of their participation in the activity.

The American College of Radiology (ACR) is approved by the American Registry of Radiologic Technologists (ARRT) as a Recognized Continuing Education Evaluation Mechanism (RCEEM) to sponsor and/or review Continuing Education programs for Radiologic Technologists and Radiation Therapists.

The American College of Radiology designates this educational activity as meeting the criteria for up to 0.5 Category A Credit hour(s) of the ARRT.

This Image Wisely Radiation Safety Case has been approved by the Commission on Accreditation of Medical Physics Education Programs, Inc. (CAMPEP) for 0.5 MPCEC continuing education credit hours.

There is no charge to participate in this educational activity. For CE credit tracking and reporting, you will be redirected to the ACR website to log in or register and add the free module to your shopping cart for $0. Step-by-step instructions on accessing the case are available here. In order to successfully complete the activity, participants must complete an activity evaluation and claim credit commensurate with their participation in the activity. For information about the accreditation of this program, please contact the ACR at