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  • Approval: This course is approved by ASRT - an approved continuing education provider of ARRT.
  • Release Date: 6/8/2018
  • Expiration Date: 7/1/2021
  • Credit Hours: 1 Credit
  • Course Description and objectives:

    Course Description
    Acute cholecystitis is one of the most common reasons for hospital admission of patients with acute abdominal pain. Approximately 90% to 95% of cases of acute calculous cholecystitis are related to gallstones, and 5% to 10% of cases are due to acute acalculous disease. Hepatobiliary scintigraphy with iminodiacetic acid derivatives is an important adjunct in the evaluation of abdominal pain and the diagnosis of acute cholecystitis. The proper use of hepatobiliary scintigraphy requires a good understanding of the physiology of the hepatobiliary system, the metabolism of hepatobiliary radiopharmaceuticals, the sensitivity, specificity, and radiation dosimetry of currently used radiopharmaceuticals, and the accuracy and risk of alternative diagnostic imaging studies. The absence of gallbladder filling identifies the cystic duct obstruction and defines the diagnosis of acute cholecystitis on hepatobiliary scintigraphy. Careful technique and patient preparation are important to a successful study and accurate diagnosis. The functional information available with nuclear imaging often cannot be obtained from anatomic imaging and can be used to make more accurate and confident diagnoses. Radiopharmaceuticals for hepatobiliary imaging have been available since the 1980s and they are used today for a variety of indications, but this review will focus only on the role of hepatobiliary scintigraphy for diagnosing acute cholecystitis.

    Learning Objectives
    After reading this article, the participant should be able to:

    • Explain the anatomy of the hepatobiliary system and the role of hepatobiliary scintigraphy in acute cholecystitis.
    • Describe the procedure and common image findings for hepatobiliary scintigraphy in patients suspected of acute cholecystitis.
    • Compare hepatobiliary scintigraphy with other diagnostic imaging modalities.

    Categories: Nuclear Medicine, Radiation Therapy/Dosimetry

  • CE Information:

    CE Information
    In order to receive CE credit, you must first complete the activity content. When completed, go to the “Take CE Test!” link to access the post-test.

    Submit the completed answers to determine if you have passed the post-test assessment. You must answer 6 out of 8 questions correctly to receive the CE credit. You will have no more than 3 attempts to successfully complete the post-test.

    Participants successfully completing the activity content and passing the post-test will receive 1.0 ARRT Category A credits.

    Approved by the American Society of Radiologic Technologists for ARRT Category A credit.

    Approved by the state of Florida for ARRT Category A credit.

    Texas direct credit.

    This activity may be available in multiple formats or from different sponsors. ARRT does not allow CE activities such as Internet courses, home study programs, or directed readings to be repeated for CE credit in the same biennium.


Hepatobiliary Scintigraphy for the Diagnosis of Acute Cholecystitis

Linda Giering, PhD*

*Medical Writer, Matawan, New Jersey

Address correspondence to: Linda Giering, PhD. Email: lindagiering@gmail.com.

Disclosure statement: The author reports having no significant financial or advisory relationships with corporate organizations related to this activity.

 

ABSTRACT

Acute cholecystitis is one of the most common reasons for hospital admission of patients with acute abdominal pain. Approximately 90% to 95% of cases of acute calculous cholecystitis are related to gallstones, and 5% to 10% of cases are due to acute acalculous disease. Hepatobiliary scintigraphy with iminodiacetic acid derivatives is an important adjunct in the evaluation of abdominal pain and the diagnosis of acute cholecystitis. The proper use of hepatobiliary scintigraphy requires a good understanding of the physiology of the hepatobiliary system, the metabolism of hepatobiliary radiopharmaceuticals, the sensitivity, specificity, and radiation dosimetry of currently used radiopharmaceuticals, and the accuracy and risk of alternative diagnostic imaging studies.

The absence of gallbladder filling identifies the cystic duct obstruction and defines the diagnosis of acute cholecystitis on hepatobiliary scintigraphy. Careful technique and patient preparation are important to a successful study and accurate diagnosis. The functional information available with nuclear imaging often cannot be obtained from anatomic imaging and can be used to make more accurate and confident diagnoses. Radiopharmaceuticals for hepatobiliary imaging have been available since the 1980s and they are used today for a variety of indications, but this review will focus only on the role of hepatobiliary scintigraphy for diagnosing acute cholecystitis.    

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Sample eRADIMAGING Course *

* This sample course is for reference purposes only. It is not currently available for earning CE credits. To earn ARRT CE credits please subscribe to eRADIMAGING where you will see a complete listing of all active and eligible CE courses.

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