Download Medical Imaging System

Medical Imaging System
Ku-Yaw Chang
canseco@mail.dyu.edu.tw
Assistant Professor, Department of
Computer Science and Information Engineering
Da-Yeh University
Outline
Background
DICOM
PACS
2004/2/26
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Background
Digital diagnostic imaging modalities
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Computed tomography (CT)
Magnetic resonance imaging (MRI)
Positron emission tomography (PET)
Single-photon emission computed
tomography (SPECT)
Ultrasound (US)
Functional MRI (fMRI)
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Background
Structural/anatomical information
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CT, MRI and US
Functional information
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PET, SPECT, and fMRI
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CT
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CT
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CT
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CT
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MR
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An Introduction to Medical Imaging System
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MR
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An Introduction to Medical Imaging System
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MR
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US
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An Introduction to Medical Imaging System
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US
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An Introduction to Medical Imaging System
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US
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PET
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PET
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PET
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PET
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DICOM
Digital Imaging and COmmunications in
Medicine
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An evolving standard in digital medicine
DICOM
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an image or file format
a networking protocol
built on top of TCP/IP
designed to store and transmit medical data
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DICOM
Official website
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http://medical.nema.org/
http://www.dicom.org.tw/index.jsp (Taiwan)
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Advantages (1)
Universal standard of digital medicine.
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All current digital image acquisition devices
produce DICOM images and work on DICOM
networks.
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Advantages (2)
Excellent image quality.
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DICOM supports up to 65536 (16 bits) shades
of gray for the monochrome image display,
still dominating many modalities. With this
respect, converting DICOM images into
JPEGs or bitmaps (with 256 shades of gray)
makes them practically unusable for
diagnostic reading. On the other hand,
DICOM does include various image-encoding
formats, from basic bitmapped data to
wavelets.
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Advantages (3)
Full support for image-acquisition parameters.
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Not only does DICOM store the image pixels, but it
also records a multitude of other image-related
parameters such as patient 3D position, physical
sizes of the objects in the image, slice thickness,
image exposure parameters, etc. This data
enormously enriches the informational content of
DICOM images, and facilitates processing and
interpreting the image data in various ways - for
instance, creating 3D images from the sequences of
2D CT slices.
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Advantages (4)
Complete encoding of medical data.
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DICOM files and messages use about 4000
standardized fields ("DICOM dictionary") to
convey various medical data - from patient
name to image color depth to current patient
diagnosis. This data is often essential for
correct diagnostics.
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PACS
Picture Archiving and Communication Systems
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complete medical systems with all hardware and
software included,
Components
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archiving servers (one or many, for online and deep
storage)
diagnostic workstations
digital image acquisition devices
DICOM conformance statement
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ensuring their conformance to the standard and
interconnectivity.
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PACS
Integrated with
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HIS: Hospital(Healthcare) Information System
RIS: Radiology Information System
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marosisTM m-gate
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Reference Website
GE Medical Systems
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http://www.gemedicalsystems.com/index.html
Fujitsu (Taiwan)
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http://tw.fujitsu.com/
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See you next time!
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