Modalities and Data Acquisition

  • J. Anthony Seibert


Acquisition modalities are the image engines in a picture archiving and communications system (PACS). Of the modality mix, radiography comprises approximately 60–70% of all studies performed in a diagnostic radiology department. Since analog screen-film recording technology is still being used in many hospitals and clinics, the implementation of a PACS for electronic image acquisition, display, and archiving is associated with the conversion of analog to digital radiography technology. But the imaging modalities are much more than radiography. Real-time digital fluoroscopy, interventional angiography, and cardiology studies are producing hundreds to thousands of images per examination. Cross-sectional imaging acquisition systems such as computed tomography (CT), magnetic resonance imaging (MRI), ultrasound (US), single-photon emission computed tomography (SPECT), and positron-emission computed tomography (PET) are expanding rapidly and are in many cases becoming the examinations of choice over projection imaging.


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Suggested Reading

  1. ACR Accreditation Procedures: Mammography, Ultrasound, Magnetic Resonance Imaging, Computed Tomography, Nuclear Medicine and PET. Available at: Accessed August 25, 2008.
  2. Digital Imaging and Communications in Medicine (DICOM) standard: Part 3: Information Object Definitions. Available at:, file 08_03pu.pdf. Accessed June 19, 2009.
  3. Integrating the Healthcare Enterprise. Available at: Accessed August 25, 2008.
  4. PACS Perfect, Parts I and II: PACS maintenance and quality control. Available at: and Accessed August 28, 2008.
  5. Seibert JA, Filipow LJ, Andriole KP, eds. Practical Digital Imaging and PACS. Madison, WI: Medical Physics Publishing; 1999.Google Scholar

Copyright information

© Society for Imaging Informatics in Medicine 2009

Authors and Affiliations

  • J. Anthony Seibert
    • 1
  1. 1.Professor of RadiologyUniversity of California DavisSacramentoUSA

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