Computed Tomography Dose Reduction Using Sequential or Fast Pitch Sprial Technique (CT DOSE)

This study is currently recruiting participants.
Verified September 2012 by William Beaumont Hospitals
Siemens Healthcare Diagnostics Inc
Information provided by (Responsible Party):
Gilbert L. Raff, MD, William Beaumont Hospitals Identifier:
First received: January 6, 2011
Last updated: September 26, 2012
Last verified: September 2012

This is a prospective, controlled observational trial of patients undergoing clinically indicated cardiothoracic computed tomography (CT), including pulmonary or aortic angiography and coronary CT angiography (CCTA).

Coronary Artery Disease
Aortic Aneurysm
Pulmonary Embolism

Study Type: Observational
Study Design: Observational Model: Case Control
Time Perspective: Prospective
Official Title: Computed Tomography Dose Reduction Using Sequential or Fast Pitch Sprial Technique Employed in Cardiothoracic Imaging

Resource links provided by NLM:

Further study details as provided by William Beaumont Hospitals:

Primary Outcome Measures:
  • Radiation dose [ Time Frame: Time of CT scan ] [ Designated as safety issue: Yes ]
    The primary endpoint is radiation dose, measured as dose-length-product (DLP, in mGy∙cm) and effective radiation dose, calculated as DLP x 0.014 (in mSv).

Secondary Outcome Measures:
  • Assessment of Image Quality [ Time Frame: Time of CT Scan ] [ Designated as safety issue: No ]
    Signal noise (standard deviation of attenuation in Hounsfield units) will be determined in regions of interest in: A) air anterior to the chest wall, B) mid-LV septum and C) mid thoracic aorta or main PA. This will be done in a sequential sample of every 5th case (approximately 600 cases total).

Estimated Enrollment: 3000
Study Start Date: January 2011
Estimated Study Completion Date: December 2013
Estimated Primary Completion Date: June 2013 (Final data collection date for primary outcome measure)
Control Group
Data from patients in the control group will be obtained retrospectively from patient medical records and stored image data
Prospective Patient Group
Data from patients in the Flash group will be obtained prospectively from scanner consoles and medical records.

Detailed Description:

The development of a novel CT scanner capable of sequential or fast-pitch spiral techniques in most patients (Siemens Definition Flash) represents a potentially crucial technical innovation at a particularly critical juncture. National healthcare systems are under pressure to deliver accurate and cost-effective diagnosis of an increasing number of patients and CT angiography in various settings is a proven, highly accurate technique that has been shown to improve diagnostic efficiency and reduce the cost of care.

However, there has been increasing concern about the lifetime attributable risk of cancer from radiation related to diagnostic procedures. Such concern extends to other radiation-based procedures that contribute to the cumulative lifetime radiation exposure of patients. The Flash scanner holds the promise of substantially reducing exposure resulting from a variety of examinations.

The CT DOSE multicenter trial is therefore designed to validate the extent of dose reduction attendant to the use of the Flash scanner in cardiothoracic scanning, and to determine whether image quality is preserved in spite of significant dose reduction.


Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population

Patients undergoing clinically indicated cardiothoracic computed tomography (CT), including pulmonary or aortic angiography and coronary CT angiography (CCTA)at 10 sites. Patient selection will be based on a site consecutive CT scan log.


Inclusion Criteria:

  • Scans from patients undergoing clinically indicated pulmonary angiography, aortography and/or CCTA.
  • Age greater than or equal to 18 years.

Exclusion Criteria:

  • No exclusions
  Contacts and Locations
Please refer to this study by its identifier: NCT01272453

Contact: Ann DePetris, RN, MSA 248.551.6683

United States, California
Naval Medical Center Completed
San Diego, California, United States, 92134
United States, Massachusetts
Massachusetts General Hospital Completed
Boston, Massachusetts, United States, 02114
United States, Michigan
William Beaumont Hospital-Royal Oak Completed
Royal Oak, Michigan, United States, 48073
William Beaumont Hospital-Troy Completed
Troy, Michigan, United States, 48085
United States, Minnesota
Minneapolis Heart Institute/ Abbott Northwestern Completed
Minneapolis, Minnesota, United States, 55407
United States, New York
NYU Langone Medical Center Completed
New York, New York, United States, 10006
United States, Ohio
Cleveland Clinic Foundation Recruiting
Cleveland, Ohio, United States, 44195
Contact: Sandra Halliburton, PhD   
Principal Investigator: Sandra Halliburton, PhD         
United States, South Carolina
Medical University of South Carolina Completed
Charleston, South Carolina, United States, 29425
Saudi Arabia
King Abdul-Aziz Cardiac Center, national Guard Health Affairs Completed
Riyadh, Kingdom of Saudi Arabia, Saudi Arabia, 11426
Sponsors and Collaborators
Gilbert L. Raff, MD
Siemens Healthcare Diagnostics Inc
Principal Investigator: Gilbert Raff, MD William Beaumont Hospitals
  More Information

No publications provided

Responsible Party: Gilbert L. Raff, MD, Medical Director, Advanced Cardiovascular Imaging, William Beaumont Hospitals Identifier: NCT01272453     History of Changes
Other Study ID Numbers: 2010-209
Study First Received: January 6, 2011
Last Updated: September 26, 2012
Health Authority: United States: Institutional Review Board

Keywords provided by William Beaumont Hospitals:
coronary artery disease
CT scan
coronary angiography
chest pain
aortic aneurysm
pulmonary embolism

Additional relevant MeSH terms:
Aortic Aneurysm
Coronary Artery Disease
Myocardial Ischemia
Coronary Disease
Pulmonary Embolism
Vascular Diseases
Cardiovascular Diseases
Aortic Diseases
Heart Diseases
Arterial Occlusive Diseases
Embolism and Thrombosis
Lung Diseases
Respiratory Tract Diseases processed this record on April 15, 2014